| Autor: |
Roland Grössinger, K. Yu. Guslienko, X.C. Kou |
| Rok vydání: |
1995 |
| Předmět: |
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| Zdroj: |
Journal of Magnetism and Magnetic Materials. 150:383-392 |
| ISSN: |
0304-8853 |
| DOI: |
10.1016/0304-8853(95)00282-0 |
| Popis: |
RFe 11 Ti rare-earth intermetallics (R = Nd, Tb, Dy, Er) which show temperature-induced spin-reorientation transitions (SRT) were investigated. The temperature dependences of the rare-earth anisotropy constants were calculated using the single-ion model. By fitting the experimental data a set of crystal-field and exchange-field parameters for R 3+ ions wassb deduced. The temperature dependence of the first-order magnetization process fields was calculated for NdFe 11 Ti and ErFe 11 Ti within the model. The calculated spin-reorientation transition in NdFe 11 Ti observed at T s = 189 K is of first order with a discontinuous jump of the magnetization angle. Present calculations show that a first-order transition occurs in DyFe 11 Ti at low temperatures. A second-order SRT from ‘easy axis’ to ‘easy cone’ exists in ErFe 11 Ti. A first-order SRT ‘easy axis’-‘easy plane’ is predicted theoretically in TbFe 11 Ti. The calculated curves of the temperature dependence of the anisotropy fields and the critical fields of the first-order magnetization processes for RFe 11 Ti using the fitted crystal- and exchange-field parameters are in good agreement with the experimental data over a wide temperature range. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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