تقرير
Exchange interactions and Curie temperature of Ce-substituted SmCo5
| العنوان: | Exchange interactions and Curie temperature of Ce-substituted SmCo5 |
|---|---|
| المؤلفون: | Jekal, S. -Y. |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | A partial substitution of Sm by Ce can have drastic effects on the magnetic performance, because it will introduce strain in the structure and breaks the lattice symmetry in a way that enhances the contribution of the Co atoms to magnetocrystalline anisotropy. However, Ce substitutions, which are benefit to improve the magnetocrystalline anisotropy, are detrimental to enhance the Curie temperature (TC). With the requirements of wide operating temperature range of magnetic devices, it is important to quantitatively explore the relationship between the TC and ferromagnetic exchange energy. In this paper we show, based on mean-field approximation, that Ce substitution-induced tensile strain in SmCo5 leads to enhanced effective ferromagnetic exchange energy and TC while Ce atom itself reduces TC. Comment: Here we provide calculation details of mean-field approximation for exchange energy and Curie temperatrure which are submitted recently in [arXiv:1807.09257] 'Pushing the limits of magnetic anisotropy in the Sm-Co system' |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1808.00988 |
| رقم الأكسشن: | edsarx.1808.00988 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |