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首页> 外文期刊>Physica, C. Superconductivity and its applications >Anisotropic properties of spherical single crystals of La1.8Sr0.2CuO4-delta
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Anisotropic properties of spherical single crystals of La1.8Sr0.2CuO4-delta

机译：La1.8Sr0.2CuO4-δ球形单晶的各向异性

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摘要

Single crystals of La1.8Sr0.2CuO4-delta grown by the traveling solvent floating zone method have been ground to spherical shape for studies of anisotropic superconducting properties by SQUID magnetometry. At low enough temperatures and fields, the spheres are perfectly shielding (susceptibility -1.5 [SI]) and thus magnetically isotropic. The field dependence of the critical temperature, the transition width and the field expulsion well below T-c of the two crystals is detailed in this paper. The anisotropy of the first critical field when the applied field is parallel and perpendicular to the c-axis of the crystals amounts to about 3 and is within errorbars independent of temperature for both samples. Magnetization vs. field experiments along principal and intermediate field directions demonstrate the angular dependence of the hysteresis. (c) 2006 Elsevier B.V. All rights reserved.
机译：通过行进溶剂浮区法生长的La1.8Sr0.2CuO4-δ单晶已被研磨成球形，以通过SQUID磁力分析研究各向异性超导性能。在足够低的温度和磁场下，球体具有完美的屏蔽性（磁化系数-1.5 [SI]），因此具有磁各向同性。本文详细介绍了两种晶体的临界温度，跃迁宽度和远低于T-c的场驱的场依赖性。当两个样品平行且垂直于晶体的c轴时，第一临界场的各向异性约为3，并且在与温度无关的误差线之内。沿主磁场方向和中间磁场方向的磁化与磁场实验证明了磁滞的角度依赖性。 （c）2006 Elsevier B.V.保留所有权利。

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