Glauber dynamics in a single-chain magnet:: From theory to real systems -: art. no. 132408
Glauber dynamics in a single-chain magnet:: From theory to real systems -: art. no. 132408
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DOI：
10.1103/physrevb.69.132408
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发表时间：
2004-04-01
影响因子：
3.7
通讯作者：
Miyasaka, H
中科院分区：
文献类型：
--
作者：
Coulon, C;Clérac, R;Miyasaka, H
研究了单链磁体中的Glauber动力学。正如预测的那样，发现一个单一的磁化弛豫模式。高于2.7 K，热激活弛豫时间主要取决于磁关联的影响和每个磁性单元经历的能量势垒。这一结果与独立的实验测量完全一致。低于2.7 K时，观察到一个跨向弛豫制度被解释为有限尺寸效应的表现。弛豫时间和磁化率的温度依赖性揭示了边界条件的重要性。
The Glauber dynamics is studied in a single-chain magnet. As predicted, a single relaxation mode of the magnetization is found. Above 2.7 K, the thermally activated relaxation time is mainly governed by the effect of magnetic correlations and the energy barrier experienced by each magnetic unit. This result is in perfect agreement with independent thermodynamical measurements. Below 2.7 K, a crossover towards a relaxation regime is observed that is interpreted as the manifestation of finite-size effects. The temperature dependences of the relaxation time and of the magnetic susceptibility reveal the importance of the boundary conditions.