Ferromagnetism and electrical transport in Fe-doped NiO
Ferromagnetism and electrical transport in Fe-doped NiO
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DOI：
10.1103/physrevb.73.193308
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发表时间：
2006-05
影响因子：
3.7
通讯作者：
Yuanhua Lin;Jianfei Wang;Jingnan Cai;Minghao Ying;Rongjuan Zhao;Ming Li;C. Nan
中科院分区：
文献类型：
--
作者：
Yuanhua Lin;Jianfei Wang;Jingnan Cai;Minghao Ying;Rongjuan Zhao;Ming Li;C. Nan
本文报道了Fe掺杂纳米粉体的室温铁磁性，其磁性主要来源于掺杂Fe离子和自由载流子的双交换机制。电性能测试表明，Fe掺杂多晶陶瓷的交流电导率可以表示为频率无关电导率和频率相关电导率之和。后者可以用晶格中载流子跳跃扩散的介电损耗的频散来表示。
We report Fe-dopednanopowder, exhibiting room ferromagnetism mainly arising from the double exchange mechanism through the doped Fe ions and free charge carriers. Electrical measurements reveal that ac conductivity of the polycrystalline ceramics with Fe-dopedcan be expressed as the sum of a frequency-independent conductivityand a frequency-dependent one. The lattercan be represented by the frequency dispersion for the dielectric loss due to the hopping diffusion of charge carriers with a single effective staying timeat a lattice site.