Low Temperature Spin-Glass Behavior in Nonmagnetic Atom Disorder Compound Pr2CuIn3
Low Temperature Spin-Glass Behavior in Nonmagnetic Atom Disorder Compound Pr2CuIn3
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非磁性原子无序化合物 Pr2CuIn3 的低温自旋玻璃行为
DOI：
10.1016/j.phpro.2015.12.091
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Tomoo Yamamura and Dai Aoki
中科院分区：
文献类型：
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作者：
Dexin Li;Yoshiya Homma;Fuminori Honda;Tomoo Yamamura and Dai Aoki
我们给出了六方CaIn2型多晶Pr2CuIn3的交直流磁化率、磁化强度、磁弛豫、比热和电阻率的实验结果。确认在该体系中形成自旋玻璃态，其自旋冻结温度Tf∼5.4 K。交流磁化率中频率依赖的尖点、明显的不可逆磁性和长时间磁弛豫行为以及比热和电阻率的温度依赖性不存在可见异常是自旋玻璃行为的典型特征。交流磁化率数据的动态分析为 Pr2CuIn3 中的自旋玻璃态提供了进一步的证据。 Pr2CuIn3中自旋玻璃态的形成似乎源于非磁性元素的连续位点随机性，这引入了Pr原子之间交换相互作用的随机分布。
We present the experimental results of ac and dc susceptibility, magnetization, magnetic relaxation, specific heat and electrical resistivity for hexagonal CaIn2-type polycrystalline Pr2CuIn3. Spin-glass state is confirmed to form in this system with a spin freezing temperatureTf∼5.4 K. The frequency dependent cusp in ac susceptibility, the evident irreversible magnetism and long-time magnetic relaxation behavior, and the absence of visible anomaly in temperature dependences of specific heat and electrical resistivity are the typical features characteristic of the spin-glass behaviors. A dynamical analysis of the ac susceptibility data gives further evidence for the spin-glass state in Pr2CuIn3. Formation of spin-glass state in Pr2CuIn3seems to originate from the continued site randomness of the non-magnetic elements, which introduce the random distribution of exchange interactions between Pr atoms.