頁籤選單縮合
題名 | UBe13: Another Phase Transition below Tc﹖= |
---|---|
作者 | Kromer,F.; Helfrich,R.; Lang,M.; Steglich,F.; Langhammer[feb4]C.; |
期刊 | Chinese Journal of Physics |
出版日期 | 19980400 |
卷期 | 36:2(Part2) 民87.04 |
頁次 | 頁157-170 |
分類號 | 330 |
語文 | eng |
關鍵詞 | |
英文摘要 | We report low-temperature measurements of the specific heat and thermal expansion on a UBe₁₃ single crystal and several U₁₋xThxBe₁₃ polycrystals (x ≤ 0.03). A new "line of anomalies", B*(T), located in the B-T phase diagram below BC₂(T) is discovered for the heavy-fermion superconductor UBe₁₃. B*(T) starts at TL ≈0.7 K (B=0) and terminates at B*(0)≤5 T. Very similar anomalies are also found for U₁₋xThxBe₁₃ with x=0.01 and 0.017. A new "line of anomalies", TL(x), is established in the T-x phase diagram. It hits the multi-critical point at xσ≈0.019 and merges smoothly into the TC₂(x) line that marks the lower of the two phase transition temperatures at x > xσ. The implications of our results for the understanding of the low-temperature phases of pure and thoriated UBe₁₃ are discussed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。