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    题名: The Interplay between Weak Ferromagnetism and Superconductivity in RuSr2EuCu2O8
    作者: Ling, D. C.;Chen, C. H.;Chen, Y. Y.;Chang, B. C.;Ku, H. C.
    贡献者: 淡江大學物理學系
    关键词: Low-temperature specific heat;d-wave superconductivity;Weak ferromagnetism
    日期: 2007-09-01
    上传时间: 2013-01-15 18:22:44 (UTC+8)
    出版者: Elsevier B.V.
    摘要: The magnetic field dependence of the low-temperature specific heat (LTSH) and I–V characteristics measurements on RuSr2EuCu2O8 were systematically carried out. It is found that the linear-T term γ decreases with increasing H, in contrast to the predicted result for the clean d-wave superconductivity. This finding suggests that the interaction between quasiparticles and magnons be weakened by magnetic field. In addition, the LTSH data exhibits a remarkably large T2 term for both H = 0 and H ≠ 0. The T2 term might be predominately associated with weak ferromagnetism in the Ru sublattice. Furthermore, the effective flux pinning energy E(H, T) determined from fitting the nonlinear region of the I–V curves follows a power-law dependence on magnetic field with an exponent close to −0.5 at a fixed temperature, indicating that the vortex lines of RuSr2EuCu2O8 is quasi-two-dimensional.
    關聯: Physica C 460-462 pt.1, pp.518-519
    DOI: 10.1016/j.physc.2007.03.280
    显示于类别:[物理學系暨研究所] 期刊論文

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