Curie temperatures of zinc-blende half-metallic ferromagnets
Curie temperatures of zinc-blende half-metallic ferromagnets
复制标题
DOI：
10.1103/physrevb.67.220403
复制
发表时间：
2003-06
影响因子：
3.7
通讯作者：
J. Kübler
中科院分区：
文献类型：
--
作者：
J. Kübler
利用局域密度近似中的密度泛函理论和自旋涨落理论，对闪锌矿半金属铁磁体VAs、CrAs、MnAs和Heusler化合物NiMnSb的居里温度进行了估算，得到的下界为从头算.在VAS、CrAs和MnAs三种化合物中，计算得到的居里温度最高的是CrAs，其费米能位于少数自旋电子能隙的中间，居里温度可能高达1000K。当费米能移入少数电子导带时，居里温度急剧下降。
Using density-functional theory in the local-density approximation and spin-fluctuation theory, the Curie temperatures of the zinc-blende half-metallic ferromagnets VAs, CrAs, MnAs and the Heusler compound NiMnSb have been estimated, the lower bounds obtained being ah initio. The orders of magnitude are the same as the Curie temperature of the half-metallic ferromagnet NiMnSb with T c = 701 K. Of the three compounds VAs, CrAs, and MnAs, the highest T c is calculated for CrAs, for which the Fermi energy is in the middle of the minority-spin electron gap; its Curie temperature might be as high as 1000 K. The Curie temperature drops sharply when the Fermi energy moves into the minority-electron conduction band as in the case of MnAs.