Effect of Fe substitution on the structural, magnetic and electron-transport properties of half-metallic Co2TiSi
Effect of Fe substitution on the structural, magnetic and electron-transport properties of half-metallic Co2TiSi
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Fe取代对半金属Co2TiSi结构、磁性和电子传输性能的影响
DOI：
10.1063/1.4974281
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发表时间：
2017
期刊：
影响因子：
1.6
通讯作者：
D. Sellmyer
中科院分区：
文献类型：
--
作者：
Yunlong Jin;J. Waybright;P. Kharel;I. Tutic;J. Herran;P. Lukashev;S. Valloppilly;D. Sellmyer
研究了用电弧熔炼和熔体快淬法制备的Co2Ti1−xFexSi(x=0，0.2 5，0.5)薄带的结构、磁性和电子输运性能。快淬态Co2Ti0.5Fe0.5Si为立方L21结构，而Co2Ti0.75Fe0.25Si和Co2TiFe0Si表现出不同程度的B2型无序。在室温下，所有样品都是铁磁性的，居里温度从Co2TiSi的360K增加到Co2Ti0.5Fe0.5Si的约800K。由于Fe部分取代了Ti原子，测得的磁化强度也有所增加。薄带为中等导电性，具有正的电阻率温度系数，室温电阻率在360~440μΩcm之间。实验观测到的结构和磁性与第一性原理计算的结果一致。我们的计算还表明，Co2Ti1−xFexSi化合物在x≤0.5时几乎保持半金属状态。预测的大带隙和高居里坦佩。
The structural, magnetic and electron-transport properties of Co2Ti1−xFexSi (x = 0, 0.25, 0.5) ribbons prepared by arc-melting and melt-spinning were investigated. The rapidly quenched Co2Ti0.5Fe0.5Si crystallized in the cubic L21 structure whereas Co2Ti0.75Fe0.25Si and Co2TiFe0Si showed various degrees of B2-type disorder. At room temperature, all the samples are ferromagnetic, and the Curie temperature increased from 360 K for Co2TiSi to about 800 K for Co2Ti0.5Fe0.5Si. The measured magnetization also increased due to partial substitution of Fe for Ti atoms. The ribbons are moderately conducting and show positive temperature coefficient of resistivity with the room temperature resistivity being between 360 μΩcm and 440 μΩcm. The experimentally observed structural and magnetic properties are consistent with the results of first-principle calculations. Our calculations also indicate that the Co2Ti1−xFexSi compound remains nearly half-metallic for x ≤ 0.5. The predicted large band gaps and high Curie tempe...
影响因子：
16.6
作者：
Jourdan, M.;Minar, J.;Braun, J.;Kronenberg, A.;Chadov, S.;Balke, B.;Gloskovskii, A.;Kolbe, M.;Elmers, H. J.;Schoenhense, G.;Ebert, H.;Felser, C.;Klaeui, M.
通讯作者：
Klaeui, M.