| YTi(Fe1-xCox)11的磁性和穆斯堡尔谱的研究 |
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| 引用本文： | 孔麟书,杨应昌. YTi(Fe1-xCox)11的磁性和穆斯堡尔谱的研究[J]. 物理学报, 1991, 40(6): 998-1004 |
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| 作者姓名： | 孔麟书 杨应昌 |
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| 作者单位： | 北京大学物理系,北京,100871 |
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| 基金项目： | 国家自然科学基金;中国科学院磁学开放研究实验室资助的课题 |
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| 摘 要： | YTi(Fe1-xCox)11在012型四方结构,居里温度随Co含量的增加而提高,本文为了揭示YTi(Fe1-xCox)11磁性与微观结构的联系,对这一系列化合物进行穆斯堡尔谱研究,在室温下,测量YTi(Fe1-xCox)11(其中x=0.0,0.2,0.4)的穆斯堡尔谱,最佳拟合结果证实在这种化合物中,Co原子优先占据j和f晶位,在所测样品中,超精细场在x=0.2处出现极值,这与YTi(Fe1-xCox)11饱和磁化强度测量结果相符合。并对YTi(Fe1-xCox)11,Y2(Fe1-xCox)14和YTi(Fe1-xCox)11的穆斯堡尔谱的实验结果进行比较,分析在YTiFe11中与Y2Fe14B中的3d电子能带结构的差异。关键词：
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| 关 键 词： | 永磁材料 磁性 穆期堡尔谱 |
| 收稿时间： | 1990-07-23 |
MAGNETIC AND M?SSBAUER SPECTRA STUDY OF YTi(Fe1-xCox)11 |
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| KONG LIN-SHU and YANG YING-CHANG. MAGNETIC AND M?SSBAUER SPECTRA STUDY OF YTi(Fe1-xCox)11[J]. Acta Physica Sinica, 1991, 40(6): 998-1004 |
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| Authors: | KONG LIN-SHU and YANG YING-CHANG |
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| Abstract: | YTi(Fe1-xCox)11 crystallizes in the ThMn12-type tetragonal structure, with x ranging from 0.0 to 1.0, the Curie temperature increases with the increase of Co content. In order to understand the relation between magnetic properties and microst-ructure of these compounds, we studied their M?ssbauer spectra. The M?ssbauer effect measurements were carried out at room temperature on YTi(Fe1-xCox)11, with x equal to 0.0, 0.2 and 0.4. The best fits confirm that Co atoms preferentially occupy the j and f sites. The hyperfine fields of the measured samples reach a maximum at x = 0.2,which is in agreement with the results of magnetic measurements. By comparing the experimental results of M?ssbauer spectra of YTi(Fe1-xCox)11, Y2(Fe1-xCox)14B and YTi(Fe1-xNix)11, we analyze the difference of the 3d band structure between YTiFe11, and Y2Fe14B.
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