Relaxation Phenomena of a Magnetic Nanoparticle Assembly with Randomly Oriented Anisotropy
Relaxation Phenomena of a Magnetic Nanoparticle Assembly with Randomly Oriented Anisotropy
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具有随机取向各向异性的磁性纳米粒子组装体的弛豫现象
DOI：
10.1143/jjap.50.035001
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发表时间：
2011-03
影响因子：
1.5
通讯作者：
Kong XueDong
中科院分区：
文献类型：
--
作者：
Fang WenXiao;He ZhenHui;Chen DiHu;En YunFei;Kong XueDong
使用局部配分函数和主方程对随机取向的各向异性对弛豫现象（包括非相互作用磁性纳米粒子组装体的记忆效应）的影响进行了数值研究，得出以下结果。在零场冷却（ZFC）过程中，能垒直方图随温度变化，而在场冷却（FC）过程中则保持稳定。在ZFC初始化后的弛豫过程中，由Tln(t/τ0)（T温度、t时间和τ0特征时间常数）标度曲线导出的有效能垒分布仅反映能垒直方图的低能区域。即使不涉及体积分布和粒子相互作用，在时间演化过程中临时冷却的记忆效应也会发生在所研究的组件中。
The effects of a randomly oriented anisotropy on relaxation phenomena including the memory effect of a noninteracting magnetic nanoparticle assembly, are numerically studied with a localized partition function and a master equation, leading to the following results. During the zero-field-cooled (ZFC) process, the energy barrier histogram changes with temperature, while during the field-cooled (FC) process it remains stable. In the relaxation process after ZFC initialization, the effective energy barrier distribution, which is derived from the Tln (t/τ0) (T temperature, t time, and τ0 characteristic time constant) scaling curve, only reflects the low-energy region of the energy barrier histogram. The memory effect with temporary cooling during time evolution occurs in the studied assembly even without volume distribution and particle interaction involved.
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影响因子：
8.6
作者：
Sun, Y;Salamon, MB;Averback, RS
通讯作者：
Averback, RS
影响因子：
3.7
作者：
S. Chakraverty;M. Bandyopadhyay;S. Chatterjee;S. Dattagupta;A. Frydman;S. Sengupta;P. Sreeram
通讯作者：
S. Chakraverty;M. Bandyopadhyay;S. Chatterjee;S. Dattagupta;A. Frydman;S. Sengupta;P. Sreeram
影响因子：
3.3
作者：
Ò. Iglesias;A. Labarta
通讯作者：
Ò. Iglesias;A. Labarta
影响因子：
3.7
作者：
G. Tsoi;L. Wenger;U. Senaratne;R. Tackett;E. C. Buc;R. Naik;P. Vaishnava;V. Naik
通讯作者：
G. Tsoi;L. Wenger;U. Senaratne;R. Tackett;E. C. Buc;R. Naik;P. Vaishnava;V. Naik
影响因子：
3.7
作者：
L. Balcells;Ò. Iglesias;Amilcar Labarta Institut de Ciencia de Materials de Barcelona-CSIC-Amilcar-Labarta-Institut-de-Ciencia-de-Materials-de-1422263517;Campus Uab;Bellaterra;Spain. Departament de F'isica Fonamental;Facultat de F'isica;U. Barcelona;Spain.
通讯作者：
L. Balcells;Ò. Iglesias;Amilcar Labarta Institut de Ciencia de Materials de Barcelona-CSIC-Amilcar-Labarta-Institut-de-Ciencia-de-Materials-de-1422263517;Campus Uab;Bellaterra;Spain. Departament de F'isica Fonamental;Facultat de F'isica;U. Barcelona;Spain.