Tuning magnetic interactions in ferromagnetic-metal nanoparticle systems
Tuning magnetic interactions in ferromagnetic-metal nanoparticle systems
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DOI：
10.1103/physrevb.71.180414
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发表时间：
2005-05-01
影响因子：
3.7
通讯作者：
Hagiwara, M
中科院分区：
文献类型：
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作者：
Tomita, S;Akamatsu, K;Hagiwara, M
实验研究了镍纳米粒子嵌入聚合物基体中的结构和磁相互作用。由于热分解导致的矩阵的收缩导致颗粒之间的间距减小，其保持几个纳米的固定直径。这伴随着电子磁共振信号的显著偏移。基于理论计算，移动追溯到增强的磁偶极相互作用，由于在粒子间的间距减小，这表明我们已经成功地在纳米粒子系统中的磁相互作用的调谐。
We have experimentally studied the structure and magnetic interaction in Ni nanoparticle systems embedded in polymer matrices. The shrinkage of the matrices due to thermal decomposition leads to a decrease in the spacing among the particles, which maintain a fixed diameter of several nanometers. This is accompanied by a significant shift of electron magnetic-resonance signals. Based on the theoretical calculation, the shift is traced back to an enhancement of the magnetic dipolar interaction due to the diminution in the interparticle spacing, suggesting that we have succeeded in tuning the magnetic interaction in the nanoparticle systems.