Magnetic properties and band structures of half-metal-type Co2CrGa Heusler alloy
Magnetic properties and band structures of half-metal-type Co2CrGa Heusler alloy
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DOI：
10.1063/1.1790029
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发表时间：
2004-09
影响因子：
4
通讯作者：
R. Umetsu;K. Kobayashi;R. Kainuma;A. Fujita;K. Fukamichi;K. Ishida;A. Sakuma
中科院分区：
文献类型：
--
作者：
R. Umetsu;K. Kobayashi;R. Kainuma;A. Fujita;K. Fukamichi;K. Ishida;A. Sakuma
研究了半金属型Co_2CrGa Heusler合金的饱和磁矩Ms和居里温度TC。L21型Co2 CrGa合金在4.2K时的Ms值为3.01μB scinf. u.，与广义Slater-Pauling线和理论计算相一致。居里温度TC为495 K，相变温度Tt为1050 K。能带计算表明，B2型结构的自旋极化率也相对较高，但它的TC比L21型结构的TC低100 K左右。
The saturation magnetic moment Ms and the Curie temperature TC of the half-metal-type Co2CrGa Heusler alloy have been investigated. The value of Ms at 4.2K for the L21-type Co2CrGa alloy is 3.01μB∕f.u., in agreement with the generalized Slater-Pauling line and the theoretical calculation. The Curie temperature TC and the phase-transformation temperature Tt from the L21 to B2-type structure are 495 and 1050K, respectively. The band calculations disclose that the spin polarization is also relatively high in the B2-type structure, although its estimated TC is about 100K lower than that of the L21-type structure.