Growth temperature dependent structural and magnetic properties of epitaxial Co{sub 2}FeAl Heusler alloy films

Journal Article · Fri Jun 21 00:00:00 EDT 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4811688· OSTI ID:22163057

Qiao, Shuang; Nie, Shuaihua; Zhao, Jianhua; Zhang, Xinhui ^[1]

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1. State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083 (China)

The structural and magnetic properties of a series of Co{sub 2}FeAl Heusler alloy films grown on GaAs(001) substrate by molecular beam epitaxy have been studied. The epitaxial Co{sub 2}FeAl films with an ordered L{sub 21} structure have been successfully obtained at growth temperature of 433 K, with an in-plane cubic magnetic anisotropy superimposed with an unusual uniaxial magnetic anisotropy. With increasing growth temperature, the ordered L{sub 21} structure degrades. Meanwhile, the uniaxial anisotropy decreases and eventually disappears above 673 K. The interfacial bonding between As and Co or Fe atom is suggested to be responsible for the additional uniaxial anisotropy.

• OSTI ID: 22163057
• Journal Information: Journal of Applied Physics, Vol. 113, Issue 23; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ANISOTROPY
ATOMS
AUGMENTATION
BONDING
COBALT ALLOYS
CRYSTAL GROWTH
CRYSTAL STRUCTURE
FILMS
GALLIUM ARSENIDES
HEUSLER ALLOYS
IRON ALLOYS
LAYERS
MAGNETIC PROPERTIES
MOLECULAR BEAM EPITAXY
SUBSTRATES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K