In
any condensed matter system, electrons are the "glue" that holds the
atoms together. Therefore the electronic structure constitutes a microscopic
base for all material properties. The electronic interactions determine whether
a solid is metallic, insulating or semiconducting, whether it is transparent or
exhibits a distinctive color, whether it is a magnet or a superconductor.
The
research program of the Institute for Electronic Properties is devoted towards
the investigation of the electronic structure of atoms, clusters,
nanostructures, and solids. The ultimate goal is the development of an
understanding and thus a base for the control of the properties of new
materials.
After
the departure of the former institute director Prof. Wolfgang Eberhardt to
BESSY in the year 2001 it was decided that in the future the Institute for
Electronic Properties should focus on research on magnetic nanostructures. It
thus can serve as a nucleus for the various research activities within this
field, which exist at the research center. A list of three candidates for the
future institute director has been established and negotiations with the first
candidate on the list are on the way. We hope that this position can be filled
in spring or early summer 2003 so that the institute can resume full operation.
In the past year the institute has shrunken considerably due to personnel
following Prof. Eberhardt to the BESSY GmbH or taking up an employment in
industry. The largest group remaining is the research group on magnetic
multilayers, which can well serve as a nucleus for the new "Institute for
Electronic Properties of Magnetic Nanostructures". Therefore the
activities of this group are highlighted in this overview.
The
areas of research of this group can be summarized as follows:
1. Deposition of magnetic thin films and multilayers by various
techniques (MBE, ion-beam, and magnetron sputtering).
2. Characterization of magnetic and magnetotransport properties
of magnetic thin film and multilayers by LEED, RHEED, MOKE, SQUID, Brillouin
light scattering (BLS) and ferromagnetic resonance (FMR), magnetoresistance
measurements, I-V characteristics, XPS, AES, XRR, soft x-ray emission (SXE),
near-edge x-ray absorption spectroscopy (NEXAFS), AFM, and STM.
3. Definition of stripes and junctions by optical and e-beam
lithography down to the 100 nm scale for transport measurements.
4. Instrumental development for (i) an in-situ chemical
analysis by XPS and AES in the ion-beam sputtering machine and (ii) electrical
transport measurements at low temperature and in a magnetic field with an
enhanced sensitivity.
Some
important research results in 2002 were:
-
The coexistence of strong antiferromagnetic interlayer
coupling and electronic transport (in CPP geometry) via tunneling could be
shown for epitaxial Fe/Si/Fe(001) trilayers. The existence of a band gap in the
Si spacer layer at the Fermi energy providing a tunneling barrier is confirmed
by preliminary spectroscopic data (SXE and NEXAFS, in collaboration with S.
Eisebitt and A. Zimina, BESSY) and correlates with sharp interfaces observed by
TEM (in collaboration with C. Jia). These results are an important piece of
information for the theoretical understanding of the coupling mechanism across Si
spacers.
-
Development of a new theoretical model to calculate BLS
spectra and MOKE hysteresis loops for magnetic multilayers with strong
antiferromagnetic coupling, for which a twisted magnetization state occurs
within each magnetic layer. The excellent agreement between MOKE and BLS
measurements and the fits according to the new model confirm the existence of
the proposed twisted magnetization state.
-
Successful deposition of VITROVAC thin films with good soft
magnetic properties by sputtering from targets built from amorphous VITROVAC
ribbons (in collaboration with U. Poppe). The magnetic characterization by BLS
and FMR indicates preparation and thickness dependent variations of the film
magnetization.
-
Optimization of the GMR ratio of Co/Cu/Permalloy pseudo spin
valves by varying the Ar pressure during magnetron sputter deposition. The
dependence is non-monotonic, and a maximum of 4% is achieved at an intermediate
pressure.
-
The GMR ratio of Co/Cu multilayers strongly depends on the
number of bilayers. This dependence can be understood by assuming that the
first few bilayers are not significantly contributing to the GMR effect but act
as buffer layers which improve the growth quality of the subsequent bilayers.
-
pairs of samples with rough and smooth interfaces could be confirmed for a
single sample with a wedge-shaped bottom Fe layer: The oscillations of the
RHEED intensity (measured along the wedge after deposition) correlate with
oscillations of the GMR ratio (measured at different position along the wedge
after lithographically defining stripe conductors perpendicular to the wedge
slope). These results allow excluding any influence of different buffer layer
qualities on the GMR ratios.
-
trilayers could be prepared by a combination of e-beam and optical lithography.
The contacts with a diameter of about 200 nm show metallic behavior and a
currently not understood dependence of the resistance on the current density. A
new process for the fabrication of nanopillars of epitaxial Fe/Cr/Fe
multilayers has been developed as an alternative route for the observation of
current-induced magnetic switching.
Most
members of the former cluster group have left the institute and with them the
equipment for cluster deposition has been transferred to Berlin. However, the
existing cluster beam apperatus is being upgrated with a linear double
reflectron. The most important scientific achievement in research on clusters was
the interpretation of scanning tunneling spectroscopy data of endohedral
fullerenes Ce@C44 and Ce@C50. Orbitals and orbital
symmetries of the fullerene molecules were calculated and assigned.
Work
continued on the two soft x-ray beamlines of IFF at DELTA and BESSY. For the
latter beamline (UE56/1-SGM) the beam
stability was improved by the installation of a more sophisticated mirror
chamber. The focus at the sample position could be improved up to a 70 mm vertical
spot size. Results obtained on the two beamlines include:
-
Investigation of the electronic structure of Co and Cu
submonolayers on stepped W(110) surfaces. The dispertion of the electronic
states of Co and Cu is compatible with the assumption of quasi on dimensional
structures, e.g., monoatomic chains.
-
For the Heussler alloy Co2CrxFe1-xAl
the electronic structure was investigated by magnetic x-ray circular dichroism
(MXCD) and the domains were observed by photoemission electron microscopy
(PEEM). The observed magnetic moments of Fe and Cr are considerably larger than
those reported in metallic compounds.
-
Soft x-ray spectroscopy of fluids. Here first observations
of concentration dependent differences in adsorption edges of iron and other 3d
metal ions in solution could be made.
In
2002 again some members of the institute received personal awards and
achievements:
Dr.
S. Blügel has been appointed institute director for the Institute Theory I of
the IFF.
Prof.
Dr. P. Grünberg received an honorary doctorate from the Ruhr-University Bochum.
Dr.
P.S. Bechthold was appointed APL Professor at the University of Cologne.
The following students have been awarded their diploma and Ph.D. degrees in
2002:
Diploma:
Henning
Dassow: Herstellung von Nanokontakten zum Nachweis strominduzierten
magnetischen Schaltens
Bernd
Heitkamp: Charakterisierung magnetischer Materialien mit X-PEEM
Lars
Pohlmann: Transporteigenschaften in Fe/Si/Fe Schichtsystemen mit halbleitenden
Zwischenschichten
Doctorate:
Jörg
Wingbermühle: Transportphänomene in magnetischen Tunnelkontakten unter
besonderer Berücksichtigung der
Ionenstrahldeposition
Christopher
Zilkens: Gestufte Oberflächen und quasieindimensionale Strukturen Photoemission
an 3d Metallen auf W(110)
Matthias
Buchmeier: Magnetische Schichtsysteme: Veränderung statischer und dynamischer
magnetischer Eigenschaften durch starke Zwischenschichtkopplung
I
would like to close this report by thanking all members of the institute for
their dedicated work during the past year.
Thomas
Brückel
Personnel 2002/2003 and areas of activity Scientists Research Areas
 |
 |
Scientists
|
Field
of Activity
|
| Dr.
L. Baumgarten |
F-sec
laser photoemission and high resolution photoemission from solids |
| Prof.
P.S. Bechthold | Electronic
structure, geometry and materials properties of clusters |
Dr.
G. Bihlmayer
until 31.10.02 | Electronic
structure theory of solids and multilayers |
| Dr.
D.E. Bürgler | Magnetic
multilayers for sensors and memory applications |
| Prof.
Dr. Th. Brückel | Interims
director |
| Dr.
S. Cramm | Beamlines
at DELTA and BESSY II |
| Dr.
R.R. Gareev | Magnetic
multilayers for sensors and memory applications |
| Prof.
P. Grünberg | Magnetic
multilayers for sensors and memory applications |
Dr.
J. Morenzin
until 31.08.02 | Development
of a magnetic security system |
| Dr.
A. Paul | Magnetic
multilayers for sensors and memory applications |
 |
 |
Technical
Engineers
|
| W.
Bergs |
Cluster
beam apparatus |
| K.
Bickmann |
Vacuum-Laboratory |
| J.
Gollnick | Secretary |
| F.-J.
Köhne | Magnetic
multilayers for sensors and memory applications |
| J.
Lauer | Electronic-Laboratory |
| H.
Pfeifer | lectronic-Laboratory |
| C.
Schiffer | Electronic-Laboratory |
| R.
Schreiber | Magnetic
multilayers for sensors and memory applications |
 |
 |
Thesis
Students
|
H.
Braak
(Diploma-student) |
Magnetic
multilayers for sensors and memory applications |
M.
Buchmeier
(PhD-student) | Magnetic
multilayers for sensors and memory applications |
M.
Breidbach
(PhD-student) | Magnetic
multilayers for sensors and memory applications |
T.
Damm
(PhD-student) | Magnetic
multilayers for sensors and memory applications |
H.
Dassow
(PhD-student) | Magnetic
multilayers for sensors and memory applications |
M.
Heide
(PhD-student)
until 31.12.02 | STM-theory |
B.
Heitkamp
(Diploma-student)
until 31.03.02 | Photoelectron
microscopy |
L.
Pohlmann
(PhD-student) | Magnetic
multilayers for sensors and memory applications |
D.
Wortmann
(PhD-student)
until 31.12.02 | Magnetic
multilayers for sensors and memory applications |
C.
Zilkens
(PhD-student)
until 31.01.02 | F-sec
laser photoemission and high resolution photoemission from solids
|
 |
 |
Trainees
|
| D.
Esser |
Electronic-Laboratory |
Publications in journals
Bode,M.*; Heinze,S.*; Hennefarth,M.*; Pietzsch,O.*; Kubetzka,A.*;
Getzlaff,M.*; Wiesendanger,R.*; Nie,X.; Bihlmayer,G.; Blügel,S.
Structural, electronic and magnetic properties of a Mn monolayer
on W(110)
Physical review B, 66 (2002), S. 014425
Bode,M.*; Heinze,S.; Kubetzka,A.*; Pietzsch,O.*; Nie,X.; Bihlmayer,G.;
Blügel,S.; Wiesendanger,R.*
Magnetization-direction-dependent local electronic structure
probed by scanning tunneling spectroscopy
Physical review letters, 89 (2002), S. 237205
Eberhardt,W.
Clusters as new materials
Surface science, 500 (2002), S. 242 - 270
Galanakis,I.; Bihlmayer,G.; Bellini,V.*; Papanikolaou,N.*; Zeller,R.;
Blügel,S.; Dederichs,P.H.
Broken bond counting rule for the surface energies of noble metals
Europhysics letters, 58 (2002), S. 751
Gambardella,P.*; Dallmeyer,A.; Maiti,K.; Malagoli,M. C.; Eberhardt,W.;
Kern,K.; Carbone,C.
Ferromagnetism in one-dimensional monatomic metal chains
Nature, 416 (2002), S. 301 - 304
Gareev,R. R.; Bürgler,D. E.; Buchmeier,M.; Schreiber,R.; Grünberg,P.
Enhanced antiferromagnetic exchange coupling in Fe/Si/Fe epitaxial
trilayers with Fe0.5Si0.5 boundary layers
Applied physics letters, 81 (2002), 7, S. 1264
Gareev,R.R.; Bürgler,D.; Buchmeier,M.; Schreiber,R.; Grünberg,P.
Very strong interlayer exchange coupling in epitaxial Fe/Fe1-xSix/Fe
trilayers (x = 0.4-1.0)
Journal of magnetism and magnetic materials, 240 (2002), S. 235
- 237
Grünberg,P.; Bürgler,D.E.; Gareev,R.R.; Olligs,D.; Buchmeier,M.;
Breidbach,M.; Kuanr,B.; Schreiber,R.
Experiments on the relation between GMR and interface roughness
and on the interlayer exchange coupling across semiconductors
Journal of physics D - applied physics, 35 (2002), S. 2403
Heinze,S.*; Kurz,Ph.; Wortmann,D.; Bihlmayer,G.; Blügel,S.
Complex magnetism in ultra-thin films : atomic-scale spin structures
and resolution by the spin-polarized scanning tunneling microscope
Applied physics A, 75 (2002), S. 25
Hoffmann,R.*; Bürgler,D. E.; van Schendel,P.J.A.*; Hug,H.
J.*; Martin,S.*; Güntherodt,H.-J.*
Perpendicular magnetic domains of a thin Ag/Fe/Ag film observed
by magnetic force microscopy at room temperature
Journal of magnetism and magnetic materials, 250 (2002), S. 32
Klingeler,R.; Bechthold,P. S.; Neeb,M.; Eberhardt,W.
An experimental setup for nondestructive deposition of size-selected
clusters
Review of scientific instruments, 73 (2002), 4, S. 1803 - 1808
Klingeler,R.; Pontius,N.; Lüttgens,G.; Bechthold,P. S.; Neeb,M.;
Eberhardt,W.
Photoelectron spectroscopy of GdO
Physical review A, 65 (2002), S. 032502
Kuanr,B.; Buchmeier,M.; Bürgler,D.E.; Grünberg,P.
Exchange coupling of MBE grown Fe/Al/Fe trilayers by dynamic
techniques
Journal of applied physics, 91 (2002), S. 7209
Kurz,Ph.; Bihlmayer,G.; Hirai,K.*; Blügel,S.
Itinerant magnets on a triangular Cu(111) lattice
Phase transitions, 75 (2002), S. 101 - 112
Kurz,Ph.; Bihlmayer,G.; Blügel,S.
Magnetism and electronic structure of hcp Gd and the Gd(0001)
surface
Journal of physics: condensed matter, 14 (2002), S. 6353
Lüttgens,G.; Pontius,N.; Bechthold,P. S.; Neeb,M.; Eberhardt,W.
Photon-induced thermal desorption of CO from small metal-carbonyl
clusters
Physical review letters, 88 (2002), S. 076102
Maiti,K.; Malagoli,M. C.; Dallmeyer,A.; Carbone,C.
Finite temperature magnetism in Gd : evidence against a stoner
behavior
Physical review letters, 88 (2002), 16, S. 167205
Maus-Friedrichs,W.*; Frerichs,M.*; Gunhold,A.*; Krischok,S.*; Kempter,V.*;
Bihlmayer,G.
The characterization of SrTiO3(001) with MIES, UPS(HeI) and first-principles
calculations
Surface science, 515 (2002), S. 499 - 506
Olligs,D.; Bürgler,D. E.; Wang,Y. G.; Kentzinger,E.; Rücker,U.;
Schreiber,R.; Brückel,Th.; Grünberg,P.
Roughness-induced enhancement of giant magnetoresistance in epitaxial
Fe/Cr/Fe(001) trilayers
Europhysics letters, 59 (2002), 3, S. 458 - 464
Paul,A.
Effect of interface roughness on magnetic multilayers of Fe/Tb
and Fe/Cr
Journal of magnetism and magnetic materials, 240 (2002), S. 497
- 500
Paul,A.; Lodha,G. S.*
Interface roughness correlation due to changing layer period
in Pt/C multilayers
Physical review B, 65 (2002), S. 245426
Pontius,N.; Lüttgens,G.; Bechthold,P. S.; Neeb,M.; Eberhardt,W.
Size dependent hot-electron dynamics in small Pdn- clusters
Journal of chemical physics, 115 (2001), S. 10479
Schondelmaier, D.; Cramm, S.; Klingeler, R.; Eberhardt, W.
Orientation and self-assembly of hydrophobic fluoroalkylsilane
Langmuir, 18 (2002) 16, S. 6242 - 6245
Wortmann,D.; Ishida,H.*; Blügel,S.
An ab initio Green-function formulation of the transfer matrix
: application to complex bandstructures
Physical review B, 65 (2002), S. 165103
ortmann,D.; Ishida,H.*; Blügel,S.
Embedded Green-function approach to the ballistic electron tran
sport through an interface
Physical review B, 66 (2002), S. 075113
Wortmann,D.; Kurz,Ph.; Heinze,S.*; Hirai,K.*; Bihlmayer,G.; Blügel,S.
Resolving noncollinear magnetism by spin-polarized scanning tunneling
microscopy
Journal of magnetism and magnetic materials, 240 (2002), S. 57 -
63
Wortmann,D.; Kurz,Ph.; Heinze,S.; Hirai,K.*; Bihlmayer,G.; Blügel,S.
Resolving noncollinear magnetism by spin-polarized scanning tunneling
microscopy
Journal of magnetism and magnetic materials, 240 (2002), S. 57 -
63
Invited talks
Bihlmayer,G.; Kurz,P.; Blügel,S.
Ab-initio prediction of complex magnetic structures in low dimensions
19th General Conference of the EPS Condensed Matter Division
Brighton: 07.04.2002 - 11.04.2002
Bihlmayer,G.; Kurz,Ph.; Förster,F.; Blügel,S.
Non-collinear ab-initio calculations with the FLAPW-method
ESF/TMR Workshop : Noncollinear Magnetism
Wien: 08.03.2001
Blügel,S.; Heinze,S.*; Wortmann,D.; Bihlmayer,G.
Theorie komplexer magnetischer Strukturen in d¸nnen Schichten
und deren Auflˆsung mittels des spin-polarisierten STM
DPG-Frühjahrstagung
Hamburg: 26.03.2001 - 30.03.2001
Bode,M.*; Pietzsch,O.*; Kubetzka,A.*; Heinze,S.*; Kleiber,M.*;
Ravlic,R.*; Nie,X.; Blügel,S.; Wiesendanger,R.*
Spin-polarisierte Rastertunnelmikroskopie
DPG-Frühjahrstagung
Hamburg: 26.03.2001 - 30.03.2001
Buchmeier,M.; Kuanr,B.; Gareev,R. R.; Bürgler,D. E.; Grünberg,P.
Studies of strongly coupled epitaxial Fe(001)/Al/Fe trilayers
by brillouin light scattering
DPG-Frühjahrstagung
Regensburg: 11.03.2002
Bürgler,D.E.
Interlayer coupling in Fe/Fe-(1-x)Si-x/Fe(001) structures
ICMFS 2002
Kyoto, Japan: 08.03.2002
Förster,F.; Bihlmayer,G.; Blügel,S.
Structure and magnetism of thin Fe films on Cu(100)
Symposium on Surface Science
St. Christoph: 03.03.2002 - 09.03.2002
Förster,F.; Bihlmayer,G.; Blügel,S.
Structure and magnetism of thin Fe films on Cu(100)
Symposium on Surface Science 2002
St. Christoph am Arlberg: 03.03.2002 - 09.03.2002
Gareev,R. R.; Bürgler,D. E.; Buchmeier,M.; Schreiber,R.; Grünberg,P.
Antiferromagnetic interlayer exchange coupling in MBE-grown Fe/Fe1-xSix/Fe
structures
DPG-Frühjahrstagung
Regensburg: 11.03.2002
Grünberg,P.; Bürgler,D.E.; Gareev,R.R.; Buchmeier,M.
Magnetic multilayers : exchange coupling of ferromagnetic films
across metallic and semiconducting interlayers
281. WE Heraeus Seminar
Wandlitz: 12.06.2002 - 15.06.2002
Heide,M.; Nie,X.; Bihlmayer,G.; Blügel,S.
Ab initio investigations of Fe/W(110) : magnetic structure of
domain-walls
DPG-Frühjahrstagung
Regensburg: 11.03.2002 - 15.03.2002
Neeb,M.; Breuer,C.; Klingeler,R.; Blanchard,A.; Wirth,I.; Bechthold,P.
S.; Eberhardt,W.
Tunneling spectroscopy on small endohedral metallofullerenes
on HOPG
The Electrochemical Society Centennial Meeting
Philadelphia, USA: 12.05.2002 - 17.05.2002
Neeb,M.; Breuer,C.; Klingeler,R.; Blanchard,A.; Wirth,I.; Bechthold,P.
S.; Eberhardt,W.
Tunnelspektroskopie an kleinen metalldotierten Fullerenen auf
HOPG
DPG-Frühjahrstagung
Regensburg: 11.03.2002 - 15.03.2002
Neeb,M.; Pontius,N.; Lüttgens,G.; Bechthold,P. S.; Eberhardt,W.
Photoelectron spectroscopy on clusters as new materials
New Opportunities in Ultrafast Science using X-rays : Workshop
Napa, CA: 14.04.2002 - 17.04.2002
Wortmann,D.
Spin-polarized ballistic electron transport through an interface
by an embedded Green-function method
ESCM 2002 : Electronic Structure and Computational Magnetism
Washington, DC: 14.07.2002 - 17.07.2002
Other talks
Bürgler,D. E.
Zwischenschicht-Kopplung über metallische, amorphe, zusammengesetzte
und halbleitende Zwischenschichten
Kolloquium : RWTH Aachen
Aachen: 10.01.2002
Bürgler,D. E.; Grünberg,P.
Structures of thin magnetic films separated by metallic or semiconducting
interlayers : growth, structural, magnetic and magnetotransport
properties
Seminar : Tohoku University
Sendai, Japan: 12.03.2002
Bürgler,D.E.
Kopplungs- und Transportph‰nomene in magnetischen Nanostrukturen
IFF-Kolloquium : Forschungszentrum Jülich
Jülich: 25.05.2002
Bürgler,D.E.
Magnetische Zwischenschichtkopplung über nicht-metallische
Zwischenschichten
SFB-Kolloquium : Universität Bochum
Bochum: 17.10.2002
Bürgler,D.E.; Grünberg,P.
Structures of thin magnetic films separated by metallic or semiconducting
interlayers : growth, structural, magnetic and magnetotransport
properties
Seminar NTT
Atsugi, Japan: 15.03.2002
Cramm,S.
Installation and first use of the IFF-IEE beamlines
Beiratstreffen im IFF : Forschungszentrum Jülich
Jülich: 21.03.2002
Damm,T.
Fortschritte Ionenstrahl-Sputteranlage
BMBF-Leitprojekt "Magneto-Elektronik"
Bielefeld: 29.05.2002
Grünberg,P.
Experiments on the relation between GMR and interface roughness
and on the interlayer exchange coupling across semiconductors
NTT
Tokyo, Japan: 13.03.2002
Grünberg,P.
Interlayer exchange coupling across metals and insulators
Kolloquium : Universite Paris Sud
Paris, France: 31.10.2002
Grünberg,P.
Magnetische Multilagen
Rundgespräch Schichtsysteme
Bad Honnef: 14.02.2002
Grünberg,P.; Bürgler,D.E.
Experiments on the relation between GMR and interface roughness
and on the interlayer exchange coupling across semiconductors
Institute for Materials Research
Sendai, Japan: 11.03.2002
Neeb,M.; Pontius,N.; Lüttgens,G.; Bechthold,P. S.; Eberhardt,W.
Time-resolved photoelectron spectroscopy on clusters
BESSY FEL Workshop
Berlin: 04.12.2002
Posters
Breidbach,M.; Olligs,D.; Bürgler,D.E.; Schreiber,R.; Grünberg,P.
Roughness-induced enhancement of giant magnetoresistance in epitaxial
Fe/Cr/Fe(001) trilayers
HGF-Workshop 'Kondensierte Materie' : Forschungszentrum Jülich
Jülich: 06.11.2002
Buchmeier,M.; Kuanr,B. K.; Dassow,H.; Bürgler,D. E.; Grünberg,P.
Studies of strongly coupled epitaxial Fe(001)/Al/Fe trilayers
by brillouin light scattering
3-Königs-Treffen : WE-Heraeus 2002
07.01.2002 - 09.01.2002
Buchmeier,M.; Kuanr,B.K.; Schreiber,R.; Bürgler,D.E.; Grünberg,P.
Studies of strongly coupled epitaxial Fe(001)/Al/Fe trilayers
by Brillouin Light Scattering
ICMFS 2002
Kyoto, Japan: 05.03.2002
Buchmeier,M.; Kuanr,B.K.; Schreiber,R.; Bürgler,D.E.; Grünberg,P.
Studies of strongly coupled epitaxial Fe(001)/Al/Fe trilayers
by Brillouin Light Scattering
HGF-Workshop 'Kondensierte Materie' : Forschungszentrum Jülich
Jülich: 06.11.2002
Bürgler,D. E.; Gareev,R. R.; Buchmeier,M.; Schreiber,R.; Grünberg,P.
Interlayer exchange coupling across iron-silicide spacers with
varying Si content
Gordon Research Conference on Magnetic Nanostructures
Il Ciocco, Italien: 28.04.2002 - 03.05.2002
Cramm,S.
First experiments and tests at beamline Ue56/1
BESSY User Meeting
Berlin: 09.12.2002
Damm,T.; Paul,A.; Bürgler,D.E.; Grünberg,P.; Jia,C*
Ion-beam and magnetron sputtering for the preparation of magnetic
multilayers
HGF-Workshop 'Kondensierte Materie' : Forschungszentrum Jülich
Jülich: 06.11.2002
Dassow,H.; Bürgler,D.E.; Grünberg,P.; Steffen,A.*; Lehmann,R.*;
van der Hart,A.*
Fabrication of nanocontacts for current induced remagnetization
of Fe/Cr/Fe layers
HGF-Workshop 'Kondensierte Materie' : Forschungszentrum Jülich
Jülich: 06.11.2002
I02
Gareev,R. R.; Bürgler,D. E.; Buchmeier,M.; Schreiber,R.; Grünberg,P.
Interlayer exchange coupling in Fe/FeSi/ /Si/FeSi/Fe structures
with combined metallic- and insulating-type spacers
MORIS 02 : Magneto Optical Recording International Symposium
05.05.2002 - 08.05.2002
Gareev,R.R.; Bürgler,D.E.; Pohlmann,L.; Buchmeier,M.; Schreiber,R.;
Grünberg,P.; Cramm,S.; Qin,Y.L.*; Jia,C.L.*; Siegel,M.*; Eisebitte,S.*;
Zimina,A.
Magnetic interlayer coupling across non-metallic spacer layers
HGF-Workshop Kondensierte Materie : Forschungszentrum Jülich
Jülich: 06.11.2002
Gareev,R.R.; Pohlmann,L. L.; Stein,S.; Bürgler,D.E.; Grünberg,P.
Tunneling across epitaxial Fe/Si/Fe structures with strong antiferromagnetic
coupling
MMM 2002 : 47th Annual Conference on Magnetism & Magnetic Materials
Tampa, Fla.: 11.11.2002 - 15.11.2002
Gareev,R.R.; Pohlmann,L.; Stein,S.; Bürgler,D.E.; Grünberg,P.
A.
Tunneling across epitaxial Fe/Si/Fe structures with strong antiferromagnetic
coupling
47th Annual Conference on Magnetism & Magnetic Materials
Tampa, Florida: 11.11.2002 - 15.11.2002
Heide,M.; Bihlmayer,G.; Blügel,S.
Magnetic structure of domain walls in ultrathin Fe films on the
W(110) surface
DPG-Frühjahrstagung
11.03.2002 - 15.03.2002
Heide,M.; Heinze,S.*; Nie,X.; Bihlmayer,G.; Blügel,S.
Ab initio investigation of Fe/W(110) : magnetism, domain-walls,
STM-images
3-Königs-Treffen : WE-Heraeus 2002
07.01.2002 - 09.01.2002
Heide,M.; Heinze,S.*; Nie,X.; Bihlmayer,G.; Blügel,S.
Ab initio investigations of Fe/W(110) : magnetism, domain-walls,
STM-images 269
WE-Heraeus Seminar on Magnetism on the Sub-Micrometer Scale : Interactions
and Microscopy
Bad Honnef: 07.01.2002 - 09.01.2002
Heide,M.; Nie,X.; Bihlmayer,G.; Blügel,S.
Ab initio investigations of Fe/W(110) : magnetic structure of
Domain-Walls
WE Heraeus Seminar
Berlin: 11.06.2002 - 15.06.2002
Heide,M.; Nie,X.; Bihlmayer,G.; Blügel,S.
Ab initio investigations of Fe/W(110) : magnetic structure of
domain-walls
2nd Annual Meeting of the RTN (Computational Magnetoelectronics)
Oleron Island, France: 05.10.2002 - 09.10.2002
Blügel,S.
Ab initio investigations of Fe/W(110) : magnetic structure of
domain-walls 281
WE-Heraeus Seminar on Spin-Orbit Interaction and Local Structure
Wandlitz: 12.06.2002 - 15.06.2002
Paul,A.; Damm,T.; Bürgler,D.E.; Stein,S.; Kohlstedt,H.; Grünberg,P.
Correlation of magnetotransport and structure evolution in sputtered
Co/Cu multilayers
HGF-Workshop Kondensierte Materie : Forschungszentrum Jülich
Jülich: 06.11.2002
Wortmann,D.; Bihlmayer,G.; Blügel,S.
A transfer matrix method for ballistic transport : MgO/Fe (001)
19th General Conference of the EPS Condensed Matter Division
Brighton: 07.04.2002 - 11.04.2002
Wortmann,D.; Ishida,H.*; Blügel,S.
A transfer matrix method for ballistic transport : MgO/Fe(001)
Physical Society Meeting of the European Physical Society CMD19CMMP
Brighton, UK: 07.04.2002 - 11.04.2002
Wortmann,D.; Ishida,H.*; Blügel,S.
An embedded Green-function approach to the ballistic electron
transport through an interface
RTN Magnetoelectronics Mid-Term Meeting
Oleron, France: 05.10.2002 - 09.10.2002
Wortmann,D.; Ishida,S.*; Blügel,S.
An embedded Green function approach to the ballistic electron
transport through an interface
Trends in Nanotechnology Conference
Santiago de Compostela, Spain: 09.09.2002 - 13.09.2002
Pd.D. Theses
Zilkens, C.
Gestufte Oberflächen und Quasieindimensionale Strukturen
Photoemission and 3d Metallen auf W(110)
2002
Köln, Univ., Diss., 2002