Dynamical and irreversible magnetic effects in i-R8Mg42Zn50 quasicrystals (R = Tb, Dy)
Dynamical and irreversible magnetic effects in i-R8Mg42Zn50 quasicrystals (R = Tb, Dy)
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DOI：
10.1016/s0304-8853(98)00241-8
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发表时间：
1998-11-01
影响因子：
2.7
通讯作者：
Schmitt, D
中科院分区：
文献类型：
--
作者：
Charrier, B;Schmitt, D
通过交流磁化率、非线性磁化率和随时间磁化率测量，研究了i-R8Mg42Zn50准晶（R = Tb, Dy）的动力学和不可逆性能。在有序温度TN和时间相关现象出现的临界温度T-c下，弛豫时间和非线性磁化率均不发散。这些不可逆效应在磁场中比在其他无序系统中存在得更高。磁矩的位置和方向的无序性，特别是准晶体，应该会影响观察到的性质。(C) 1998 Elsevier Science B.V.版权所有
Dynamical and irreversible properties of i-R8Mg42Zn50 quasicrystals (R = Tb, Dy) have been investigated through AC susceptibility, non-linear magnetic susceptibility and time-dependent magnetization measurements. Neither relaxation times nor non-linear susceptibility diverge at the ordering temperature TN or at the critical temperature T-c where time-dependent phenomena appear. These irreversible effects exist in magnetic fields much higher than in other disordered systems. The positional and orientational disorder of the magnetic moments, specific of quasicrystals, should influence the observed properties. (C) 1998 Elsevier Science B.V. All rights reserved.