頁籤選單縮合
題 名 | Study of Magnetic Properties in the Vanadium Oxide Spinel Systems Li₁₋xMgxV₂O₄ |
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作 者 | Masrour, R.; Hamedoun, M.; Hourmatallah, A.; Bouslykhane, K.; Benzakour, N.; Benyoussef, A.; | 書刊名 | Chinese Journal of Physics |
卷 期 | 46:5 2008.10[民97.10] |
頁 次 | 頁593-600 |
分類號 | 330 |
關鍵詞 | |
語 文 | 英文(English) |
英文摘要 | The magnetic properties of the spinel systems Li₁₋xMgxV₂O₄ have been studied using mean field theory, and the probability law, and high-temperature series expansions (HTSEs) in the range 0≦x≦1. The nearest neighbor J1 (x) and the next-nearest neighbor’s super-exchange interaction J2 (x) were calculated using mean field theory in the range 0.95 ≦x≦1 with the probability law in the range of 0≦x≦1. The interplanar interactions are deduced. Thus the corresponding classical exchange energy for the magnetic structures is obtained. The HTSE method has been applied to the spinel systems Li₁₋xMgxV₂O₄, combined with the Padé approximants method, to determine the magnetic phase diagrams (Tc versus dilution x) in the range of ≦x≦1. The theoretical results obtained are in agreement with the experimental ones obtained by magnetic measurements. The classical site percolation threshold obtained in this system is xp ≈ 0.2. The critical exponents associated with the magnetic susceptibility and with the correlation lengths are deduced for this system in the ordered phase. |
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