Journal Article/Review

FZJ-2015-04981

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Role of the tuning parameter at magnetic quantum phase transitions

Fritsch, V. (Corresponding author) ; Stockert, O. (Corresponding author) ; Huang, C.-L. ; Bagrets, N. ; Kittler, W. ; Taubenheim, C. ; Pilawa, B. ; Woitschach, S. ; Huesges, Z. ; Lucas, S. ; Schneidewind, A.FZJ* ; Grube, K. ; Löhneysen, H. v. (Corresponding author)

2015
Springer Berlin

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Please use a persistent id in citations: doi:10.1140/epjst/e2015-02443-6

Abstract: Heavy-fermion systems, with their competition betweenKondo and RKKY interactions, offer a rich variety of materials thatmay be driven to a magnetic quantum phase transition. Quite often,a quantum critical point can be approached by chemical substitution,notably of isoelectric ligands of Ce, as in CeCu6−xAux andCePd1−xNixAl. While in the former we compare pressure and concentrationtuning of the magnetic structure, the latter has the additionalfeature of geometric frustration due to the distorted kagom´e sublatticeof Ce atoms in the basal plane. We further present the systemCeAu2Ge2 where minor structural differences between crystals grownfrom Sn or Au-Ge flux lead to pronounced differences in the magneticstructure, with several field-induced phases in samples grown fromAu-Ge flux. Finally, non-isoelectronic substitution of Ti by V is studiedin CeTi1−xVxGe3 where CeTiGe3 is a ferromagnet, thus allowingthe study of ferromagnetic quantum criticality, a rare case for heavyfermionsystems.

Keyword(s): Basic research (1st) ; Others (1st) ; Fundamental Science (1st) ; Condensed Matter Physics (2nd) ; Magnetism (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
2. Streumethoden (JCNS-2)

Research Program(s):

1. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. PANDA: Cold three axes spectrometer (SR2)

Appears in the scientific report 2015

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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