頁籤選單縮合
| 題 名 | Multi-Critical Behavior of Irreversibility Lines for Rb₃C₆₀ Fullerenes |
|---|---|
| 作 者 | Tai,Ming-fong; Sung,Chien-min; | 書刊名 | Chinese Journal of Physics |
| 卷 期 | 36:2(Part2) 民87.04 |
| 頁 次 | 頁457-462 |
| 分類號 | 330 |
| 關鍵詞 | |
| 語 文 | 英文(English) |
| 英文摘要 | The irreversibility lines of polycrystalline and single-crystal Rb₃C₆₀ fullerenes determined by M(T) curves and M(H) loops are wel1 characterized by a simple 3-dimensional power law function: Hirr(T)=H₀(1-T/T₀)ⁿ, with various n values obtained in different field regions and for different specimens. For polycrystalline Rb₃C₆₀ powders, the irreversibility field in the low field region (Hirr < 1 T) obeys the power function with n=2, which suggests that a vortex-lattice melting transition may have occurred. However, in the high field region (Hirr < 1 T), n=3/2. This reduced exponent may be explained by the model of thermally activated vortex motion with collective pinning. For Rb₃C₆₀ crystals, the irreversibility line can be perfectly fitted to a linear relation, i.e., n=1:Hirr(T)=a(1-T/T₀), where a=4.8 T and T₀=60.0 K for H < 3.2 T; and a=7.92 T and T₀=30.3 K for H < 3.2 T. This is the first reported linear temperature-dependence of the irreversibility field. |
本系統中英文摘要資訊取自各篇刊載內容。