Specific Heat of Co2TiO4 and its Anomaly Associated with Magnetic Transition
| العنوان: | Specific Heat of Co2TiO4 and its Anomaly Associated with Magnetic Transition |
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| المؤلفون: | Shinya Waki, Shinji Ogawa |
| المصدر: | Journal of the Physical Society of Japan. 20:540-545 |
| بيانات النشر: | Physical Society of Japan, 1965. |
| سنة النشر: | 1965 |
| مصطلحات موضوعية: | symbols.namesake, Materials science, Anisotropy energy, Condensed matter physics, Ferrimagnetism, Spin wave, Exchange interaction, symbols, General Physics and Astronomy, Curie temperature, Anisotropy, Debye model, Ion |
| الوصف: | The specific heat of a ferrimagnet Co 2 TiO 4 which has a spinel structure was measured between 2°K and room temperature. An anomalous heat due to a magnetic transition was observed. The Curie temperature is found to be 49.0°K. The total entropy of the transition is approximately Rln8 which suggests that the degeneracies of ground states of Co 2+ ions in tetrahedral and octahedral sites are fourfold and twofold respectively. The Debye temperature is 560°K. The observed magnetic specific heat below about 30°K shows the modified T 3/2 dependence which is predicted from the spin wave theory taking into account the anisotropy energy, except at very low temperature. The effective anisotropy field, 2 K / M S , is 4.8×10 4 Oe. The absolute magnitude of the exchange Interaction of the spin, 3/2, of a Co 2+ ion in a tetrahedral site with the fictitious spin, 1/2, of a Co 2+ ion in an octahedral site, J A B ', is evaluated to be 3.23 k B . |
| تدمد: | 1347-4073 0031-9015 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::14b7fe616b0594b501c6b9f45c779d21Test https://doi.org/10.1143/jpsj.20.540Test |
| رقم الانضمام: | edsair.doi...........14b7fe616b0594b501c6b9f45c779d21 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13474073 00319015 |
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