MAGNETIC-PROPERTIES OF ULTRA-FINE IRON PARTICLES

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题名:	MAGNETIC-PROPERTIES OF ULTRA-FINE IRON PARTICLES
作者:	JEN,SU;LEE,CY;YAO,YD;LEE,KC
贡献者:	物理研究所
关键词:	MOSSBAUER-SPECTROSCOPY;SURFACE ANISOTROPY;METAL PARTICLES;FILMS
日期:	1991
上传时间:	2010-07-08 14:14:12 (UTC+8)
出版者:	中央大學
摘要:	Ultra-fine iron particles of sizes ranging from 75 to 300 angstrom were prepared by the gas-evaporation method in an argon atmosphere. By controlling the pressure of argon gas, various sizes of iron particles were made. From TEM micrographs, the mean particle size is determined. Magnetic properties of these particles were obtained by a vibrating sample magnetometer. It is considered that an oxidation layer may be formed on the surface of iron particles, when they are exposed to air. Based on this surface effect, most of the observed magnetic behavior, such as temperature dependences of magnetization and coercive force, can be explained. X-ray and differential scanning calorimetry measurements were also performed on these particles.
關聯:	JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
显示于类别:	[物理研究所] 期刊論文

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