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首页> 外文期刊>Physica, B. Condensed Matter >Low-temperature transport measurements of superconductors and semiconductors in magnetic fields to 800 T
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Low-temperature transport measurements of superconductors and semiconductors in magnetic fields to 800 T

机译：超导体和半导体在800 T磁场中的低温传输测量

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Recent innovations in sample lithography and measurement techniques have made possible electrical transport measurements on both high-T-c superconductor and semiconductor samples in the harsh environment of implosively generated magnetic fields B up to 800 T, with reliable data obtained up to 300 T. Thin films of the cuprate superconductor YBa2Cu3O7-delta have been studied with B directed parallel to the CuO planes (J parallel to B perpendicular to c-axis). At an ambient temperature of 1.6 K and a probe frequency of 0.9 GHz we find an onset of dissipation at B-on = (150 +/- 20) T, the highest field yet reported. In addition, the measured upper critical held B-c2 = (240 +/- 30) T is significantly above the paramagnetic limit for this material. Measurements on AlxGa1-xAs/GaAs parabolic quantum well structures, designed to probe the existence of a magnetically induced triplet superconducting phase, and on HgSe:Fe samples are also discussed. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 21]
机译：样品光刻和测量技术的最新创新使得在高达800 T的爆炸性磁场B的恶劣环境下，对高Tc超导体和半导体样品的电迁移测量成为可能，并获得了高达300 T的可靠数据。研究了铜酸盐超导体YBa2Cu3O7-δ，其中B平行于CuO平面定向（J平行于B垂直于c轴）。在1.6 K的环境温度和0.9 GHz的探头频率下，我们发现在B-on =（150 +/- 20）T时开始出现耗散，这是迄今为止报道的最高场。此外，测得的最高临界保持B-c2 =（240 +/- 30）T大大高于该材料的顺磁极限。还讨论了测量AlxGa1-xAs / GaAs抛物线形量子阱结构（用于探测磁感应三重态超导相）以及HgSe：Fe样品的测量。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：21]

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