Evidence for antiferromagnetic-type ordering of f-electron multipoles in PrIr2Zn20
Evidence for antiferromagnetic-type ordering of f-electron multipoles in PrIr2Zn20
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PrIr2Zn20 中 f 电子多极子反铁磁型排序的证据
DOI：
10.1103/physrevb.95.155106
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发表时间：
2017
影响因子：
3.7
通讯作者：
Gukasov Arsen
中科院分区：
文献类型：
--
作者：
Iwasa Kazuaki;Matsumoto Keisuke T.;Onimaru Takahiro;Takabatake Toshiro;Mignot Jean-Michel;Gukasov Arsen
在外加磁场下进行的中子衍射测量证明了大约0.1 K以下的有序结构。双通道（轨道）近藤效应预计将在立方对称的这种材料的前电子的非Kramers双重基态内起作用。在外加磁场的影响下，明显地诱发了反铁磁反射，其特征在于传播矢量q=（1/2，1/2，1/2）。这一结果表明反铁磁型有序的Pr电子多极。型四极矩是由观测到的磁结构因子推导出的主要序参量。我们还讨论了该材料中与低能晶体电场分裂能级有关的各种有限量级多极子的纠缠。
Neutron diffraction measurements conducted under applied magnetic fields evidence the ordered structure ofbelow approximately 0.1 K. A two-channel (orbital) Kondo effect is expected to act within the non-Kramers doublet ground state of the Prelectrons of this material in cubic symmetry. Antiferromagnetic reflections are clearly induced under the influence of applied magnetic fields, which are characterized by the propagation vector q=(1/2,1/2,1/2). This result indicates antiferromagnetic-type ordering of the Pr-electron multipoles. The-type quadrupole,, is the dominant order parameter deduced from the observed magnetic structure factor. We also discuss the entanglement of various finite-magnitude multipoles up to third rank, which are relevant to the low-energy crystalline-electric-field split levels in this material.