陈克正

教授

教授 博士生导师 硕士生导师

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Tailorable magnetic properties of &Epsilon;-Fe<inf>2</inf>O<inf>3</inf>/SiO<inf>2</inf>hybrid via alkaline etching

发布时间:2023-10-19 点击次数:

关键字:Magnetism;Etching - Magnetic properties - Saturation magnetization - Silica - Silicon oxides;Alkaline etching - Etching time - Etching treatment - Exchange-bias fields - Pinning effects - SiO2 (D) - Sodium hydroxide solutions
摘要:In this study, conventional silicon alkaline-etching procedure was utilized to tailor magnetic properties of &Epsilon;-Fe<inf>2</inf>O<inf>3</inf>/SiO<inf>2</inf>hybrid. It was found that the saturation magnetization, coercivity and exchange bias field can be readily changed and tailored by altering the etching time and frequency in a set of sodium hydroxide solutions. The relative quantity of &Epsilon;-Fe<inf>2</inf>O<inf>3</inf>phase, the proximity or pinning effect derived from SiO<inf>2</inf>phase as well as the phase transformation from &Epsilon;-Fe<inf>2</inf>O<inf>3</inf>to &alpha;-Fe<inf>2</inf>O<inf>3</inf>during etching treatment were three main factors to its controllable magnetic properties. This work will shed new light on the development of functional &Epsilon;-Fe<inf>2</inf>O<inf>3</inf>/SiO<inf>2</inf>composites with tailorable magnetism in practical magnetically-relevant applications. &copy; 2017 Elsevier Ltd and Techna Group S.r.l.
卷号:43
期号:18
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