Phase stability of chromium based compensated ferrimagnets with inverse Heusler structure

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:341

Article

Meinert, Markus¹  Geisler, Manuel P.¹ 

[1] Univ Bielefeld, Dept Phys, D-33501 Bielefeld, Germany

关键词: Heusler compound;    Half metal;    Antiferromagnet;    Spin electronics;    Computational materials science;    Compound synthesis;   

DOI  :  10.1016/j.jmmm.2013.04.025

来源: Elsevier

【 摘 要 】

Chromium based inverse Heusler compounds of the type Cr(2)YZ (Y=Co, Fe; Z=Al, Ga, In, Si, Ge, Sn) have been proposed as fully compensated half-metallic ferrimagnets. Such materials are of large interest for spintronics because they combine small magnetic moment with high spin polarization over a wide temperature range. We assess their thermodynamic stability by their formation enthalpies obtained from density functional theory calculations. All compounds under investigation are unstable. Cr2FeSi and Cr2CoAl are stable with respect to the elemental constituents, but decompose into binary phases. Cr2FeGe, Cr2CoGa, Cr2FeSn and Cr2CoIn are found to be unstable with respect to their elemental constituents. We identify possible binary decompositions. (c) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

Free