Fluctuation diamagnetism and mass anisotropy of YBa2Cu3O6+x

被引：41

作者：

Hubbard, MA ^{[1
]}

Salamon, MB ^{[1
]}

Veal, BW ^{[1
]}

机构：

[1] ARGONNE NATL LAB,ARGONNE,IL 60439

来源：

PHYSICA C | 1996年 / 259卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0921-4534(96)80003-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured the fluctuation magnetization of large samples of YBa2CU3O6+x with a variety of oxygen concentrations. Magnetization is measured for several isotherms near T-c as a function of applied magnetic field parallel to the c-axis, in fields up to 7 T. The fluctuation magnetization data are consistent with the predictions of 3D-XY scaling over the full doping range studied, x = 0.7-0.9. Within the anisotropic-effective-mass model, scaling of the temperature and field dependence of the magnetization can be used to determine the mass anisotropy and also the separate variations of the in-plane and out-of-plane coherence lengths with doping level. We show that the increase of anisotropy with decreasing oxygen content is dominated by changes in xi(ab)(0), With little change in xi(c)(0).

引用

页码：309 / 320

页数：12

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