Spin-glass behaviour, thermal expansion anomaly and spin fluctuations in Y20(Mn1-xFex)80amorphous alloys
| العنوان: | Spin-glass behaviour, thermal expansion anomaly and spin fluctuations in Y20(Mn1-xFex)80amorphous alloys |
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| المؤلفون: | Asaya Fujita, M. Ohta, Kazuaki Fukamichi, Hiroyasu Fujimori, Yoshihisa Obi |
| المصدر: | Journal of Physics: Condensed Matter. 11:4053-4062 |
| بيانات النشر: | IOP Publishing, 1999. |
| سنة النشر: | 1999 |
| مصطلحات موضوعية: | Spin glass, Condensed matter physics, Chemistry, Exchange interaction, Atmospheric temperature range, Condensed Matter Physics, Thermal expansion, Condensed Matter::Materials Science, Paramagnetism, Ferromagnetism, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, General Materials Science, Anomaly (physics) |
| الوصف: | The spin-glass behaviour and the thermal expansion anomaly in annealed Y20(Mn1-xFex)80 amorphous alloys have been investigated. The spin freezing temperature Tg shows a minimum at around x = 0.50, consistent with the theoretical investigation. The sign of the paramagnetic Curie temperature p indicates that the average exchange interaction is antiferromagnetic in the Mn-rich concentration region and gradually becomes ferromagnetic with increasing x. The minimum of Tg occurs at the concentration where the sign of p changes. The spontaneous volume magnetostriction is negligibly small in the Mn-rich concentration region and becomes larger with increasing x. These results are explained by the change in the spin fluctuation characteristics. In the Fe-rich concentration region, the thermal expansion anomaly takes place even in the paramagnetic temperature range due to the single-site spin fluctuation. |
| تدمد: | 1361-648X 0953-8984 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::7ba42305603078908ff6685ff519c8e0 https://doi.org/10.1088/0953-8984/11/20/312 |
| رقم الأكسشن: | edsair.doi...........7ba42305603078908ff6685ff519c8e0 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1361648X 09538984 |
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