Transport properties of Bi2Sr2Ca1−xGdx(Cu1−yZny)2Oy epitaxial thin films

Tzuen-Rong Yang , G. Ilonca , Mi-Ra Kim , G. Stiufiuc , C. Lung
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引用次数: 1

Abstract

Measurements of magnetoresistivity, Seebeck, Nernst and Hall coefficients in the mixed state for “Bi:2212” epitaxial thin films, prepared by DC sputtering, and doped with Gd (0≤x≤0.5) and Zn (0≤y≤0.03) in magnetic fields between 0 and 5 T, and the temperature range 5–50 K are reported. The critical temperatures, the Hall, Nernst and Seebeck coefficients depend strongly on Zn and Gd contents in the samples. The tails of the transport coefficients versus temperature curves are caused by fluctuation effects, which increase with increasing magnetic field. These anomalous behaviors validate the theories based on time dependent Ginsburg–Landau theory.

Bi2Sr2Ca1−xGdx(Cu1−yZny)2Oy外延薄膜的输运特性
本文报道了用直流溅射法制备的掺有Gd(0≤x≤0.5)和Zn(0≤y≤0.03)的“Bi:2212”外延薄膜在0 ~ 5t磁场、5 ~ 50k温度范围内的混合态磁电阻率、塞贝克、能斯特和霍尔系数的测量结果。临界温度、霍尔系数、能斯特系数和塞贝克系数与样品中Zn和Gd的含量密切相关。输运系数随温度变化曲线的尾部是由波动效应引起的,随磁场的增大而增大。这些异常行为验证了基于时间依赖的金斯堡-朗道理论的理论。
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