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

被引：1

作者：

Reibelt, M. ^{[1
]}

Weyeneth, S. ^{[1
]}

Erb, A. ^{[2
]}

Schilling, A. ^{[1
]}

机构：

[1] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

[2] BAdW, Walther Meissner Inst, D-85748 Garching, Germany

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2011年 / 24卷 / 10期

关键词：

LATTICE MELTING TRANSITION; UNTWINNED YBA2CU3O7-DELTA; LATENT-HEAT; FLUX LINES; SUPERCONDUCTORS; MAGNETIZATION; DIFFRACTION; VORTICES; QUANTUM; SYSTEM;

D O I：

10.1088/0953-2048/24/10/105019

中图分类号：

O59 [应用物理学];

学科分类号：

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.

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页数：5

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