Evidence of a magnetic glass state in the magnetocaloric material Gd 5 Ge 4
Evidence of a magnetic glass state in the magnetocaloric material Gd 5 Ge 4
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DOI：
10.1103/physrevb.74.012403
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发表时间：
2006-07
影响因子：
3.7
通讯作者：
S. Roy;M. Chattopadhyay;P. Chaddah;J. Moore;G. Perkins;L. Cohen;K. Gschneidner;V. Pecharsky
中科院分区：
文献类型：
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作者：
S. Roy;M. Chattopadhyay;P. Chaddah;J. Moore;G. Perkins;L. Cohen;K. Gschneidner;V. Pecharsky
我们证明了在零和低外加磁场下，磁热材料在实验时间尺度内发生的从高温反铁磁态到铁磁基态的一级相变的动力学停滞。磁化研究清楚地揭示了低温反铁磁有序状态下的玻璃状动力学。观察到玻璃状磁性状态是不寻常的，但我们预计类似的现象应该存在于其他磁性系统中。
We demonstrate the kinetic arrest of the first-order phase transition from the high-temperature antiferromagnetic state to the ferromagnetic ground state in zero and low applied magnetic fields, occurring within the experimental time scale in the magnetocaloric material. A magnetization study clearly reveals glasslike dynamics in the low-temperature antiferromagnetically ordered state. The observation of a glasslike magnetic state is unusual, but we expect that a similar phenomenon should exist in other magnetic systems.