Effects of Ga substitution on structure and magnetocrystalline anisotropy of Tm2Fe17
文献类型：期刊论文
| 作者 | B. G. Shen ; Z. H. Cheng ; F. W. Wang ; Q. W. Yan ; H. Tang ; B. Liang ; S. Y. Zhang |
| 刊名 | Journal of Applied Physics
 |
| 出版日期 | 1998 |
| 卷号 | 83期号:11页码:5945-5954 |
| 关键词 | magnetic-properties neutron-diffraction solid-solutions r(2)fe(17-x)ga(x) compounds mossbauer r=y sm2fe17-xsix fe-57 iron tb |
| ISSN号 | 0021-8979 |
| 中文摘要 | A detailed investigation of the structure and magnetic properties of Tm2Fe17-xGax (x = 0, 1, 2, 3, 4, 5, 6, 7, and 8) compounds has been performed by means of x-ray-diffraction, neutron-diffraction, magnetization, and ac-susceptibility measurements. Crystal-structure studies have shown that the prepared samples are single phase with the hexagonal Th2Ni17 for x less than or equal to 3 and the rhombohedral Th2Zn17 structure for x greater than or equal to 5, In Tm2Fe13Ga4 the Th2Zn17 structure coexists with the Th2Ni17 structure. Substitution of Ga for Fe in Tm2Fe17 leads to an increase of the unit-cell volume, which is linear with the Ga concentration. In Tm2Fe17-xGax, the saturation magnetization at 1.5 K decreases linearly with increasing Ga content with a rate of 2.3 mu(B), per substituted Ga atom. The Curie temperature is found first to increase with increasing Ga content, going through a maximum value of 485 K at about x = 3, then to decrease. Between x = 6 and 7, a minimum value of T-C is reached and for higher x values T-C increases again. X-ray-diffraction measurements on magnetically aligned Tm2Fe17-xGax powders show that the compounds with x less than or equal to 6 have an easy-plane type of magnetic anisotropy, whereas the compounds with x greater than or equal to 7 exhibit easy c-axis anisotropy at room temperature. All Tm2Fe17-xGax compounds exhibit a spin-reorientation transition at low temperature, except for the sample with x = 6, which shows an easy-magnetization direction perpendicular to the c axis in the temperature range from 5 to 300 K. For x less than or equal to 5, the spin-reorientation temperature is found first to increase with x and then to decrease, having a maximum value of 211 K at about x = 3. In the samples with x greater than or equal to 7, an easy-plane anisotropy was observed at low temperature, but an easy-axis preference of the magnetization at room temperature was observed. The results obtained for Tm2Fe17-xGax indicate that the mutually competing Tm- and Fe-sublattice anisotropies both change their sign with increasing Ga concentration. (C) 1998 American Institute of Physics. [S0021-8979(98)00311-9]. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/37763]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | B. G. Shen,Z. H. Cheng,F. W. Wang,et al. Effects of Ga substitution on structure and magnetocrystalline anisotropy of Tm2Fe17[J]. Journal of Applied Physics,1998,83(11):5945-5954. |
| APA | B. G. Shen.,Z. H. Cheng.,F. W. Wang.,Q. W. Yan.,H. Tang.,...&S. Y. Zhang.(1998).Effects of Ga substitution on structure and magnetocrystalline anisotropy of Tm2Fe17.Journal of Applied Physics,83(11),5945-5954. |
| MLA | B. G. Shen,et al."Effects of Ga substitution on structure and magnetocrystalline anisotropy of Tm2Fe17".Journal of Applied Physics 83.11(1998):5945-5954. |
入库方式： OAI收割
来源：金属研究所
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