Influence of particle size on the magnetic viscosity and activation volume of /spl alpha/-Fe nanowires in alumite films
Influence of particle size on the magnetic viscosity and activation volume of /spl alpha/-Fe nanowires in alumite films
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DOI：
10.1109/20.619548
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发表时间：
1997-09
影响因子：
2.1
通讯作者：
Feiyue Li;R. Metzger;W. Doyle
中科院分区：
文献类型：
--
作者：
Feiyue Li;R. Metzger;W. Doyle
在室温下研究了在氧化铝中的细长/spl α/-Fe颗粒（阳极氧化铝膜中的Fe纳米线）的粒度对磁粘度和活化体积的影响。磁粘度和激活体积都强烈地依赖于颗粒的直径，但与颗粒的长度无关。讨论了Alumite膜中拉长/spl α/-Fe粒子的磁化反转机制。激活体积可以表示在非均匀磁化反转期间沿着颗粒长度沿着传播的磁性切换单元的尺寸。
Particle size effects on the magnetic viscosity and activation volume were studied at room temperature for elongated /spl alpha/-Fe particles in alumite (Fe nanowires in an anodized aluminum oxide film). Both magnetic viscosity and activation volume are strongly dependent on the particle diameter, but independent of the particle length. The magnetization reversal mechanism of elongated /spl alpha/-Fe particles in alumite films is discussed. The activation volume may represent the size of the magnetic switching unit propagating along the particle length during the non-uniform magnetization reversal.