The role of 3d electrons in the appearance of ferromagnetism in the antiferromagnetic Ru2MnGe Heusler compound: a magnetic Compton scattering study
The role of 3d electrons in the appearance of ferromagnetism in the antiferromagnetic Ru2MnGe Heusler compound: a magnetic Compton scattering study
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DOI：
10.1088/0953-8984/24/25/255601
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
S. Mizusaki;T. Ohnishi;A. Douzono;M. Hirose;Y. Nagata;M. Itou;Y. Sakurai;T. C. Ozawa;H. Samata;Y. Noro
中科院分区：
文献类型：
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作者：
S. Mizusaki;T. Ohnishi;A. Douzono;M. Hirose;Y. Nagata;M. Itou;Y. Sakurai;T. C. Ozawa;H. Samata;Y. Noro
Mn取代V可抑制Ru_2 Mn_Ge的反铁磁性，并出现铁磁性。基于同步加速器的磁康普顿散射实验，以调查的作用，3d电子的间接/直接交换相互作用的外观铁磁性。磁康普顿轮廓上巡游电子部分的小自旋矩表明金属铁磁体Ru2Mn0.5V0.5Ge在类d和类sp（巡游）电子之间具有弱的间接交换相互作用。这表明Ru_2MnGe Heusler化合物的铁磁性是由于d-d电子间的直接交换作用增强所致。这些结果表明，巡游电子和定域电子之间的间接交换作用是该体系铁磁性出现的一个重要关键。
The antiferromagnetism in Ru2MnGe can be suppressed by the substitution of V by Mn and ferromagnetism appears. Synchrotron-based magnetic Compton scattering experiments are used in order to investigates the role of 3d electrons in the indirect/direct exchange interactions for the appearance of ferromagnetism. A small spin moment for the itinerant electron part on the magnetic Compton profile indicates that the metallic ferromagnet Ru2Mn0.5V0.5Ge has a weak indirect exchange interaction between the d-like and sp-like (itinerant) electrons. This suggests that the appearance of ferromagnetism is caused by the enhancement of the direct exchange interactions between d–d electrons in the Ru2MnGe Heusler compound. These findings indicate that the indirect exchange interaction between itinerant electrons and localized electrons is a significant key point for the appearance of ferromagnetism in this system.