Journal Article

FZJ-2017-03697

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Lateral Magnetically Modulated Multilayers by Combining Ion Implantation and Lithography

Menéndez, E. (Corresponding author) ; Modarresi, H. ; Petermann, C. ; Nogués, J. (Corresponding author) ; Domingo, N. ; Liu, H. ; Kirby, B. J. ; Syed Mohd, A.FZJ* ; Salhi, Z.FZJ* ; Babcock, E.FZJ* ; Mattauch, S.FZJ* ; Van Haesendonck, C. ; Vantomme, A. ; Temst, K. (Corresponding author)

2017
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/smll.201603465

Abstract: The combination of lithography and ion implantation is demonstrated to be a suitable method to prepare lateral multilayers. A laterally, compositionally, and magnetically modulated microscale pattern consisting of alternating Co (1.6 µm wide) and Co-CoO (2.4 µm wide) lines has been obtained by oxygen ion implantation into a lithographically masked Au-sandwiched Co thin film. Magnetoresistance along the lines (i.e., current and applied magnetic field are parallel to the lines) reveals an effective positive giant magnetoresistance (GMR) behavior at room temperature. Conversely, anisotropic magnetoresistance and GMR contributions are distinguished at low temperature (i.e., 10 K) since the O-implanted areas become exchange coupled. This planar GMR is principally ascribed to the spatial modulation of coercivity in a spring-magnet-type configuration, which results in 180° Néel extrinsic domain walls at the Co/Co-CoO interfaces. The versatility, in terms of pattern size, morphology, and composition adjustment, of this method offers a unique route to fabricate planar systems for, among others, spintronic research and applications.

Keyword(s): Magnetic Materials (1st) ; 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. Neutronenstreuung (Neutronenstreuung ; JCNS-1)
3. 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. MARIA: Magnetic reflectometer with high incident angle (NL5N)

Appears in the scientific report 2017

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

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