頁籤選單縮合
題 名 | Novel Oscillation for the Indirect Coupling between Magnetic Nanoparticles |
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作 者 | Chang, Ching-hao; Hong, Tzay-ming; | 書刊名 | Chinese Journal of Physics |
卷 期 | 47:5 2009.10[民98.10] |
頁 次 | 頁703-714 |
分類號 | 336.4 |
關鍵詞 | |
語 文 | 英文(English) |
英文摘要 | We study the prospect of using magnetic nanoparticles for the diluted magnetic semiconductors. The Ruderman-Kittel-Kasuya-Yosida formula is modified by explicitly taking into account the role of the charge carriers inside the nanoparticles in addition to those in the medium. Calculations are done analytically. The final form of the coupling is similar to the original formula, except for an additional phase term which gives a novel oscillatory feature with respect to the particle size, an interesting analogue to the same behavior when we vary their distance. This is to be contrasted with the previous approach which did not include the inner carriers and ended up only favoring a ferromagnetic coupling. The effect of inevitable deviations from a perfect sphere is estimated by the Born approximation. Our derivations can be readily generalized to finite temperatures. |
本系統中英文摘要資訊取自各篇刊載內容。