Mn3-xGa (0 ≤ x ≤ 1): Multifunctional thin film materials for spintronics and magnetic recording

被引：141
作者：
Kurt, H. [1 ]
Rode, K.
Venkatesan, M.
Stamenov, P.
Coey, J. M. D.
机构：
[1] Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2011年 / 248卷 / 10期
关键词：
exchange bias; Heusler alloys; magnetic anisotropy; spin-polarized transport; spin transfer torque; PERPENDICULAR-ANISOTROPY; HEUSLER COMPOUNDS; TUNNEL-JUNCTION; ALLOYS; MEDIA; BEHAVIOR; MN3GA;
D O I：
10.1002/pssb.201147122
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Tetragonal Mn3-xGa (0 <= x <= 1) epitaxial films possess exceptional magnetic and electronic properties. Stoichiometric Mn3Ga crystallizes in the D0(22) structure (abstract figure) and is a collinear ferrimagnet with an easy c-axis. It exhibits a unique combination of low magnetization, high uniaxial anisotropy, high Curie temperature and high spin polarization, which suit the requirements for spin torque memories down to 10 nm in size. Mn2Ga, on the other hand, exhibits much higher magnetization, high perpendicular anisotropy and high Curie temperature but a lower spin polarization, which make it a potential candidate for high density bit-patterned recording with areal densities up to 10 Tb inch(-2) (similar to 15 kb mu m(-2)) and 10-year thermal stability. The flexibility of the D0(22) structure allows a variety of magnetic materials to be synthesized with varying x to suit specific magnetic applications. Hexagonal D0(19)-Mn3Ga films are antiferromagnetic, which could be useful for exchange bias. [GRAPHICS] . (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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页码：2338 / 2344
页数：7
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