Epitaxial strain and antiferromagnetism in Heusler Fe{sub 2}VSi thin films

Journal Article · Fri Apr 01 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3555089· OSTI ID:21538223

Fukatani, N; Ueda, K; Asano, H ^[1]

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1. Department of Crystalline Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603 (Japan)

The effects of biaxial strain on the electrical and magnetic properties of an antiferromagnetic Heusler compound Fe{sub 2}VSi were systematically investigated. A series of epitaxial Fe{sub 2}VSi thin films on MgAl{sub 2}O{sub 4} and MgO substrates were fabricated with different tensile strains by varying the substrate-lattice mismatch and the film thickness. The strain was characterized by the ratio of the out-of-plane lattice parameter c to the in-plane lattice parameter a; this ratio c/a varied from 0.987 to 0.998 at room temperature. The tensile epitaxial strain was found to increase the antiferromagnetic Neel temperature T{sub N} to 193 K, which is 70 K higher than that for the unstrained bulk material. A clear dependence of T{sub N} on c/a was observed, which is consistent with theoretical predictions in which the band Jahn-Teller effect plays a significant role.

• OSTI ID: 21538223
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 7; Other Information: DOI: 10.1063/1.3555089; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINATES
ANTIFERROMAGNETIC MATERIALS
CRYSTAL DEFECTS
ELECTRIC CONDUCTIVITY
EPITAXY
IRON ALLOYS
JAHN-TELLER EFFECT
LATTICE PARAMETERS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
NEEL TEMPERATURE
SILICON ALLOYS
SPUTTERING
STRAINS
SUBSTRATES
TEMPERATURE RANGE 0065-0273 K
TERNARY ALLOY SYSTEMS
THIN FILMS
VANADIUM ALLOYS
ALKALINE EARTH METAL COMPOUNDS
ALLOY SYSTEMS
ALLOYS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CRYSTAL GROWTH METHODS
CRYSTAL STRUCTURE
ELECTRICAL PROPERTIES
FILMS
MAGNETIC MATERIALS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT ALLOYS
TRANSITION TEMPERATURE