Memory effects in an interacting magnetic nanoparticle system
Memory effects in an interacting magnetic nanoparticle system
复制标题
DOI：
10.1103/physrevlett.91.167206
复制
发表时间：
2003-10-17
影响因子：
8.6
通讯作者：
Averback, RS
中科院分区：
文献类型：
--
作者：
Sun, Y;Salamon, MB;Averback, RS
我们进行了一系列的测量来研究相互作用的磁性纳米粒子系统的低温动力学。结果表明，在直流磁化和磁弛豫中存在显著的记忆效应，支持相互作用的磁性纳米颗粒中存在自旋玻璃相。此外，我们观察到温度变化的不对称响应支持分层图，而不是在其他关于纳米颗粒系统的研究中讨论的液滴模型。
We have performed a series of measurements to study the low temperature dynamics of an interacting magnetic nanoparticle system. The results obtained demonstrate striking memory effects in the dc magnetization and magnetic relaxation that support the existence of a spin-glass-like phase in interacting magnetic nanoparticles. Moreover, we observe an asymmetric response with respect to temperature change that supports a hierarchical picture, rather than the droplet model discussed in other works on nanoparticle systems.