Magnetic Properties and Magnetoresistance in Fe-ITO Granular Films

Magnetic Properties and Magnetoresistance in Fe-ITO Granular Films
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Fe-ITO 颗粒薄膜的磁性能和磁阻

DOI:
10.1007/s11661-010-0195-5
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发表时间:
2010-03
影响因子:
2.8
通讯作者:
Chen, Peng
Chen, Peng
中科院分区:
材料科学2区
文献类型:
--
作者:
Yu, Tian;Chen, Ke;Li, Xing-Qing;Lv, Ling;Gao, Chun-Hong;Chen, Peng

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采用射频共溅射技术制备了不同Fe含量的Fe-ITO颗粒膜。研究了样品的磁性和磁电阻特性。随着Fe的体积分数的增加,观察到从超顺磁性颗粒膜到铁磁性多畴颗粒膜的转变。具有低体积分数的Fe的样品的磁电阻遵循(M/MS)2,而具有高体积分数的Fe的样品的磁电阻由铁磁性和超顺磁性贡献组成,这可能是由于存在小的孤立的超顺磁性颗粒和互连的或较大的铁磁性Fe颗粒而引起的。需要进一步的形态学和晶体学分析来完全建立解释。
Fe-ITO granular films with various volume fractions of Fe were prepared using the radio frequency (RF) co-sputtering technique. The magnetic and magnetoresistance properties were investigated. A transition from superparamagnetic granular films to ferromagnetic multidomain granular films with increasing the volume fraction of Fe is observed. The magnetoresistance of sample with low volume fraction of Fe follows (M/MS)2, while the magnetoresistance of samples with high volume fraction of Fe is composed of a ferromagnetic and a superparamagnetic contribution that is likely caused by the presence of small isolated superparamagnetic granules and interconnected or larger granules of ferromagnetic Fe. Further morphological and crystallographic analysis is required to fully establish the explanation.
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