Fabrication of CoFe2O4 ferrite nanowire arrays in porous silicon template and their local magnetic properties

doi:10.1088/1674-1056/25/2/026201

中国物理B ›› 2016, Vol. 25 ›› Issue (2): 26201-026201.doi: 10.1088/1674-1056/25/2/026201

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Fabrication of CoFe₂O₄ ferrite nanowire arrays in porous silicon template and their local magnetic properties

Hui Zheng(郑辉), Man-Gui Han(韩满贵), Long-Jiang Deng(邓龙江)

State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

收稿日期:2015-06-27 修回日期:2015-11-01 出版日期:2016-02-05 发布日期:2016-02-05
通讯作者: Man-Gui Han E-mail:magnet@uestc.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61271039), the Scientific Projects of Sichuan Province, China (Grant No. 2015HH0016), and the Natural Science Foundations of Zhejiang Province, China (Grant Nos. LQ12E02001 and Y107255).

Fabrication of CoFe₂O₄ ferrite nanowire arrays in porous silicon template and their local magnetic properties

Hui Zheng(郑辉), Man-Gui Han(韩满贵), Long-Jiang Deng(邓龙江)

State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

Received:2015-06-27 Revised:2015-11-01 Online:2016-02-05 Published:2016-02-05
Contact: Man-Gui Han E-mail:magnet@uestc.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61271039), the Scientific Projects of Sichuan Province, China (Grant No. 2015HH0016), and the Natural Science Foundations of Zhejiang Province, China (Grant Nos. LQ12E02001 and Y107255).

摘要/Abstract

摘要： CoFe₂O₄ ferrite nanowire arrays are fabricated in porous silicon templates. The porous silicon templates are prepared via metal-assisted chemical etching with gold (Au) nanoparticles as the catalyst. Subsequently, CoFe₂O₄ ferrite nanowires are successfully synthesized into porous silicon templates by the sol-gel method. The magnetic hysteresis loop of nanowire array shows an isotropic feature of magnetic properties. The coercivity and squareness ratio (M_r/M_s) of ensemble nanowires are found to be 630 Oe (1 Oe=79.5775 A·m^-1 and 0.4 respectively. However, the first-order reversal curve (FORC) is adopted to reveal the probability density function of local magnetostatic properties (i.e., interwire interaction field and coercivity). The FORC diagram shows an obvious distribution feature for interaction field and coercivity. The local coercivity with a value of about 1000 Oe is found to have the highest probability.

关键词: ferrite nanowires, porous silicon, metal-assisted chemical etching, first order reversal curves

Abstract: CoFe₂O₄ ferrite nanowire arrays are fabricated in porous silicon templates. The porous silicon templates are prepared via metal-assisted chemical etching with gold (Au) nanoparticles as the catalyst. Subsequently, CoFe₂O₄ ferrite nanowires are successfully synthesized into porous silicon templates by the sol-gel method. The magnetic hysteresis loop of nanowire array shows an isotropic feature of magnetic properties. The coercivity and squareness ratio (M_r/M_s) of ensemble nanowires are found to be 630 Oe (1 Oe=79.5775 A·m^-1 and 0.4 respectively. However, the first-order reversal curve (FORC) is adopted to reveal the probability density function of local magnetostatic properties (i.e., interwire interaction field and coercivity). The FORC diagram shows an obvious distribution feature for interaction field and coercivity. The local coercivity with a value of about 1000 Oe is found to have the highest probability.

Key words: ferrite nanowires, porous silicon, metal-assisted chemical etching, first order reversal curves

中图分类号: (Nanowires)

62.23.Hj

68.65.-k (Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties) 75.30.Gw (Magnetic anisotropy)

郑辉, 韩满贵, 邓龙江. Fabrication of CoFe₂O₄ ferrite nanowire arrays in porous silicon template and their local magnetic properties[J]. 中国物理B, 2016, 25(2): 26201-026201.

Hui Zheng(郑辉), Man-Gui Han(韩满贵), Long-Jiang Deng(邓龙江). Fabrication of CoFe₂O₄ ferrite nanowire arrays in porous silicon template and their local magnetic properties[J]. Chin. Phys. B, 2016, 25(2): 26201-026201.

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Fabrication of CoFe₂O₄ ferrite nanowire arrays in porous silicon template and their local magnetic properties

Fabrication of CoFe₂O₄ ferrite nanowire arrays in porous silicon template and their local magnetic properties

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