تقرير
On the limits of coercivity in permanent magnets
| العنوان: | On the limits of coercivity in permanent magnets |
|---|---|
| المؤلفون: | Fischbacher, J., Kovacs, A., Oezelt, H., Gusenbauer, M., Schrefl, T., Exl, L., Givord, D., Dempsey, N. M., Zimanyi, G., Winklhofer, M., Hrkac, G., Chantrell, R., Sakuma, N., Yano, M., Kato, A., Shoji, T., Manabe, A. |
| المصدر: | Appl. Phys. Lett. 111, 072404 (2017) |
| سنة النشر: | 2017 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, 82D40 |
| الوصف: | The maximum coercivity that can be achieved for a given hard magnetic alloy is estimated by computing the energy barrier for the nucleation of a reversed domain in an idealized microstructure without any structural defects and without any soft magnetic secondary phases. For Sm$_{1-z}$Zr$_z$(Fe$_{1-y}$Co$_y$)$_{12-x}$Ti$_x$ based alloys, which are considered an alternative to Nd$_2$Fe$_{14}$B magnets with lower rare-earth content, the coercive field of a small magnetic cube is reduced to 60 percent of the anisotropy field at room temperature and to 50 percent of the anisotropy field at elevated temperature (473K). This decrease of the coercive field is caused by misorientation, demagnetizing fields and thermal fluctuations. Comment: 5 pages, 4 figues |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.4999315 |
| URL الوصول: | http://arxiv.org/abs/1708.01880 |
| رقم الأكسشن: | edsarx.1708.01880 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.4999315 |
|---|