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首页> 外文期刊>Physica, C. Superconductivity and its applications >First-order disorder-driven transition and inverse melting of the vortex lattice
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First-order disorder-driven transition and inverse melting of the vortex lattice

机译：一阶无序驱动的涡旋晶格转变和逆熔化

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Vortex matter phase transitions in the high-temperature superconductor Bi2Sr2CaCu2O8 were studied using local magnetization measurements combined with a vortex 'shaking' technique. The measurements revealed thermodynamic evidence of a first-order transition (FOT) along the second magnetization peak line. at temperatures below the apparent critical point T-cp. We found that the FOT line does not terminate at T-cp, but continues down to at least 30 K. This observation suggests that the ordered vortex lattice phase is destroyed through a unified FOT that changes its character from thermally induced melting at high temperatures to a disorder-induced transition at low temperatures. At intermediate temperatures the transition fine shows an upturn. which implies that the vortex matter displays 'inverse' melting behavior. (C) 2001 Published by Elsevier Science B.V. [References: 52]
机译：利用局部磁化测量结合涡旋“摇动”技术研究了高温超导体Bi2Sr2CaCu2O8中的涡旋物质相变。测量揭示了沿第二磁化峰线的一阶跃迁（FOT）的热力学证据。温度低于表观临界点T-cp。我们发现FOT线并没有在T-cp处终止，而是继续下降到至少30K。该观察结果表明，有序的涡流晶格相通过统一的FOT破坏了，该FOT将其特性从高温下的热诱导熔化转变为高温。在低温下由无序引起的转变。在中间温度下，过渡细粉显示出上升趋势。这意味着涡旋物质显示出“逆”熔化行为。 （C）2001年由Elsevier Science B.V.出版[参考文献：52]

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