Observation of spin-glass behavior in antiperovskite compound Mn3Cu0.7Ga0.3N
Observation of spin-glass behavior in antiperovskite compound Mn3Cu0.7Ga0.3N
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DOI：
10.1063/1.4813412
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发表时间：
2013-07
影响因子：
4
通讯作者：
Xiaohong Zhang;Q. Yuan;Jiecai Han;J. Zhao;J. Jian;Zhonghua Zhang;B. Song
中科院分区：
文献类型：
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作者：
Xiaohong Zhang;Q. Yuan;Jiecai Han;J. Zhao;J. Jian;Zhonghua Zhang;B. Song
我们对反钙钛矿化合物 Mn3Cu0.7Ga0.3N 的磁性能进行了详细研究。 Ac 磁化率测量显示在“凝固温度”(Tf) 附近出现峰值，峰值位置随驱动频率 f 和磁场 H 的变化而变化。磁弛豫测量显示，随着时间低于 Tf，剩余磁化强度会缓慢衰减。这些发现一致证明了 Mn3Cu0.7Ga0.3N 中存在自旋玻璃态。该行为可能归因于混合 Cu/Ga 原子随机占据空间群 Pm-3m 中 1a 位点而产生的少量无序，或共同的挫败，或两者兼而有之。
We present a detailed study of magnetic properties of antiperovsite compound Mn3Cu0.7Ga0.3N. Ac susceptibility measurements show a peak around “freezing temperature” (Tf), with the peak position shifting as a function of the driving frequency f and magnetic field H. Magnetic relaxation measurements show a slow decay of the remanent magnetization with time below Tf. These findings consistently demonstrate the existence of spin-glass states in Mn3Cu0.7Ga0.3N. The behavior may be attributed to either a small amount of disorder, arising from the random occupation of 1a sites in the space group Pm-3m by mixed Cu/Ga atoms, or the common frustration, or both.