Role of hyperfine coupling in magnetic and quadrupolar ordering of Pr3Pd20Si6.
Role of hyperfine coupling in magnetic and quadrupolar ordering of Pr3Pd20Si6.
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超精细耦合在 Pr3Pd20Si6 磁性和四极有序中的作用。
DOI：
10.1103/physrevlett.111.077202
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发表时间：
2013
影响因子：
8.6
通讯作者：
M. Brando
中科院分区：
文献类型：
--
作者：
Lucia Steinke;K. Mitsumoto;Corneliu F. Miclea;F. Weickert;A. Donni;M. Akatsu;Y. Nemoto;T. Goto;Hideaki Kitazawa;P. Thalmeier;M. Brando
我们研究了三元笼形物Pr3Pd20Si6在高质量单晶上的比热和交流磁化率测量，区分了反铁磁和反铁磁四极有序，以及迄今为止未知的磁性低温转变。比热表明了核自旋自由度与反铁磁有序的直接关系，我们计算的无可调参数超精细能级方案很好地支持了这一点。因此，Pr3Pd20Si6是极少数核矩参与磁基态形成的材料之一。
We study the ternary clathrate Pr3Pd20Si6 in specific heat and ac susceptibility measurements on a high-quality single crystal, distinguishing antiferromagnetic and antiferroquadrupolar ordering, as well as a hitherto unknown magnetic low-temperature transition. The specific heat shows the direct involvement of nuclear spin degrees of freedom in the antiferromagnetic ordering, which is well supported by our calculation of the hyperfine level scheme without adjustable parameters. Pr3Pd20Si6 is, therefore, one of the rare materials where the nuclear moments are involved in the formation of the magnetic ground state.