Angular-dependent torque magnetometry on single-crystal HgBa2CuO4+y near the critical temperature

被引：19

作者：

Hofer, J

Schneider, T

Singer, JM

Willemin, M

Keller, H

Rossel, C

Karpinski, J

机构：

[1] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

[2] IBM Corp, Div Res, Zurich Res Lab, CH-8803 Ruschlikon, Switzerland

[3] ETH Zurich, Festkorperphys Lab, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.60.1332

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Angular-dependent torque magnetization measurements an a HgBa2CuO4+y microcrystal performed close to the critical temperature T-c are analyzed within the framework of three-dimensional (3D) XY critical behavior. In a finite magnetic field the magnetic torque is given by the derivative of a universal scaling function dG(z)/dz, where the scaling argument z depends on temperature, field, and the angle between the field and the c axis of the sample. We are able to determine dG/dz quantitatively by scaling the angular-dependent torque data. Universal constants and critical amplitudes for HgBa2CuO4+y are calculated. [S0163-1829(99)03425-6].

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页码：1332 / 1339

页数：8

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