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首页> 外文期刊>Physical review >Antiferromagnetic exchange interactions in the Ni_2Mn_(1.4)In_(0.6) ferromagnetic Heusler alloy
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Antiferromagnetic exchange interactions in the Ni_2Mn_(1.4)In_(0.6) ferromagnetic Heusler alloy

机译：Ni_2Mn_（1.4）In_（0.6）铁磁Heusler合金中的反铁磁交换相互作用

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摘要

Magnetism in Ni-Mn-Z (Z = Ga, In, Sn, Sb) Heusler alloys has so far been predominantly attributed to Rudermann-Kittel-Kasuya-Yoshida type interactions between Mn atoms. We investigate magnetic interactions in one such alloy, Ni_2Mn_(1.4)In_(0.6), and attempt to explain the origin of antiferromagnetic (AFM) interactions that coexist with ferromagnetic ones. Through the combination of x-ray absorption spectroscopy and x-ray magnetic circular dichroism (XMCD), we find that Ni plays an important role along with Mn in the overall magnetism. A significant hybridization that develops between Mn and Ni orbitals results in a small antiferromagnetic moment at Ni sites. The shift in the XMCD hysteresis loops in the martensitic phase suggests that antiferromagnetism results from superexchange like interactions between Mn atoms mediated by Ni.
机译：迄今为止，Ni-Mn-Z（Z = Ga，In，Sn，Sb）Heusler合金中的磁性主要归因于Mn原子之间的Rudermann-Kittel-Kasuya-Yoshida型相互作用。我们研究了一种这样的合金Ni_2Mn_（1.4）In_（0.6）中的磁相互作用，并试图解释与铁磁共存的反铁磁（AFM）相互作用的起源。通过结合X射线吸收光谱法和X射线磁性圆二色性（XMCD），我们发现Ni与Mn一起在整个磁性中起着重要的作用。在Mn和Ni轨道之间发生的显着杂交会在Ni位置产生小的反铁磁矩。马氏体相中XMCD磁滞回线的变化表明，反铁磁性是由超交换（如由Ni介导的Mn原子之间的相互作用）产生的。

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  • 来源
    《Physical review》 |2013年第14期|144412.1-144412.6|共6页
  • 作者

    K. R. Priolkar; P. A. Bhobe; D. N. Lobo; S. W. DSouza; S. R. Barman; Aparna Chakrabarti; S. Emura;

  • 作者单位

    Department of Physics, Goa University, Taleigao Plateau, Goa 403206, India;

    Department of Physics, Goa University, Taleigao Plateau, Goa 403206, India,School of Basic Sciences, Indian Institute of Technology Indore, Indore, 452017 India;

    Department of Physics, Goa University, Taleigao Plateau, Goa 403206, India;

    UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore, 452001, Madhya Pradesh, India;

    UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore, 452001, Madhya Pradesh, India;

    Raja Ramanna Centre for Advanced Technology, Indore 452013, Madhya Pradesh, India;

    Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;

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  • 正文语种 eng
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  • 关键词

    X-ray absorption spectra; magnetooptical effects; martensitic transformations;

    机译：X射线吸收光谱;磁光效应;马氏体转变;

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