Electronic Structure of Cr--Mn--V--Z System Based on Heusler Mn2VZ (Z = Al, Ga)

元データ 2012-07-15

概要

On the basis of first-principles calculations of (Mn1-xCrx)2VZ and Mn2(V1-yYy)Z (Y = Cr, Mn; Z = Al, Ga), we have shown the possibility of getting highly spin-polarized (P \geq 90%) alloys of magnetic moments ranging from -2 to 0 \mu_{\text{B}}/f.u. in these systems. Moreover, these systems has the ferrimagnetic state as the most stable magnetic state. The systems Mn2(V1-yYy)Z have a high spin polarization (larger than 90%) for 0 \leq y \leq 1. The spin polarization (P) of (Mn1-xCrx)2VZ markedly decreases for x \geq 0.5. The cause of the drastic change is not the disappearance of a gap but the location of the E_{\text{F}} in the up-spin band.

著者

Ishida Shoji Department Of Physics Faculty Of Science Kagoshima University
Asano Setsuro Institute For Solid State Physics The University Of Tokyo
Haraguchi Kyosuke Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan
FUJII Shinpei Graduate School of Science and Engineering, Kagoshima University, Kagoshima 890-0065, Japan

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