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arXiv 1003.4688cond-mat.supr-con
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YBa2Cu3O7涡固区一级相变的观测

Observation of a first-order phase transition deep within the vortex-solid region of YBa2Cu3O7

M. Reibelt, S. Weyeneth, A. Erb, A. Schilling

摘要:

通过磁热和磁化测量研究了完全氧化的去孪晶YBa_2Cu_3O_7单晶的磁相图,发现了涡旋-固体区域内存在一个依赖于温度的一级相变线的热力学证据。熵的相关不连续性显然与磁通量密度成正比,这可能暗示了涡旋晶格的结构转变。

英文摘要:

We have investigated the magnetic phase diagram of a fully oxygenated detwinned YBa2Cu3O7 single crystal by means of magneto-caloric and magnetization measurements, and found thermodynamic evidence for a temperature dependent first-order phase-transition line deep within the vortex-solid region. The associated discontinuities in the entropy are apparently proportional to the magnetic flux density, which may hint at a structural transition of the vortex lattice.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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