Effect of light on the magnetic properties of cobalt ferrite nanoparticles

被引：63

作者：

Giri, AK ^{[1
]}

Pellerin, K

Pongsaksawad, W

Sorescu, M

Majetich, SA

机构：

[1] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

[2] Duquesne Univ, Dept Phys, Pittsburgh, PA 15282 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2000年 / 36卷 / 05期

基金：

美国安德鲁·梅隆基金会; 美国国家科学基金会;

关键词：

cobalt ferrite; coercivity; photomagnetic effect; remanent magnetization;

D O I：

10.1109/20.908666

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report variations in the coercivity of CoFe2O4 nanoparticles as a function of particle size, temperature and light intensity. For 30 nm particles, this change in was 2300 Oe at 10K, 120 Oe at 170K, for a light intensity of under 2 milliwatts. The remanent magnetization was nearly unchanged by illumination. A simple model of optical absorption followed by electron transfer between Co2+ and Fe3+ ions is proposed.

引用

页码：3029 / 3031

页数：3

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