| 机械合金法合成Fe25Ni75超细粉末的磁各向异性常数的研究 |
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| 引用本文： | 许士跃,何正明,施耀铭,张正明,董传华,陈杭德.机械合金法合成Fe25Ni75超细粉末的磁各向异性常数的研究[J].上海大学学报(英文版),2000,4(1). |
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| 作者姓名： | 许士跃 何正明 施耀铭 张正明 董传华 陈杭德 |
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| 作者单位： | 3*2。23，ZX，PY-W] Received Jun. 18，1999; Revised Sep.3，1999 Supported by the |
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| 基金项目： | theScienceFoundationofShanghaiMunicipalCom missionofEducation !(80 796 5) |
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| 摘 要： | 1 Ｉｎｔｒｏｄｕｃｔｉｏｎ ＵｌｔｒａｆｉｎｅｐａｒｔｉｃｌｅｓｏｆｍａｇｎｅｔｉｃｍａｔｅｒｉａｌｓｓｕｃｈａｓＦｅ,Ｃｏ,Ｎｉａｎｄｔｈｅｉｒａｌｌｏｙｓｈａｖｅｔｈｅｐｏｔｅｎｔｉａｌａｐｐｌｉｃａｔｉｏｎｓｉｎｍａｇｎｅｔｉｃｒｅｃｏｒｄｉｎｇ,ｆｅｒｒｏｆｌｕｉｄｓ,ｍｅｄｉｃａｌｄｉａｇｎｏｓｔｉｃｅｔｃ..Ｔｈｅｍａｇｎｅｔｉｃｐｒｏｐｅｒｔｉｅｓｏｆｆｉｎｅｐａｒｔｉｃｌｅｓｄｉｆｆｅｒｍａｇｎｉｆｉｃｅｎｔｌｙｆｒｏｍｔｈｏｓｅｏｆｌａｒｇｅｐａｒｔｉｃｌｅｓ,ａｎｄｔｈｅｒｅｌａｔ…
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Magnetic Anisotropy of Mechanically Alloyed Fe25Ni75 Nanocrystallites |
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| XU Shi-Yue,HE Zheng-ming,SHI Yao-ming,ZHANG Zheng-ming,Dong Chuan-Hua,CHEN Hang-de.Magnetic Anisotropy of Mechanically Alloyed Fe25Ni75 Nanocrystallites[J].Journal of Shanghai University(English Edition),2000,4(1). |
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| Authors: | XU Shi-Yue HE Zheng-ming SHI Yao-ming ZHANG Zheng-ming Dong Chuan-Hua CHEN Hang-de |
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| Abstract: | The magnetic anisotropy of Fe25Ni75 nanocrystallites in the range of 10～20 nm was measured by the law of approach to saturation. The samples were prepared by mechanical alloying process, and the average crystal size was determined by X-ray diffraction. The effective magnetic anisotropy of these fine particles is found in an order of 106 erg/cm3 that is much greater than that of normal crystal size of particles. The dependence of magnetic anisotropy on the particle size was studied. It has been demonstrated that the strain anisotropy occupies the most of the total magnetic anisotropy, and the internal strain is a critical factor for their magnetic properties. |
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| Keywords: | magnetic anisotropy saturation magnetization strain anisotropy ultra fine particles single domain mechanical alloying |
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