تقرير
Geometrical origin of ferrimagnetism and superparamagnetism in Fe-based double perovskite multiferroics
| العنوان: | Geometrical origin of ferrimagnetism and superparamagnetism in Fe-based double perovskite multiferroics |
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| المؤلفون: | Kuzian, R. O., Laguta, V. V., Richter, J. |
| المصدر: | Physf. Rev. B90, 134415 (2014) |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We show that a superstructure of antiferromagnetically interacting Fe$^{3+}$ ($S=5/2$) ions in double perovskites AFe$_{1/2}$M$_{1/2}$O$_{3}$ exhibits a ferrimagnetic ordering below $T_{fe} \approx 5.6J_1$ ($J_1/k_B \sim 50$~K), which is close to room temperature. Small clusters of the same structure exhibit a superparamagnetic behavior at $T \lesssim T_{fe}$. The possibility of formation of such clusters explains the room-temperature (superpara)magnetism in 3$d$-metal based oxides. Comment: 8 pages, 8 figures, submitted to Phys. Rev. B |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.90.134415 |
| URL الوصول: | http://arxiv.org/abs/1310.8079 |
| رقم الأكسشن: | edsarx.1310.8079 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.90.134415 |
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