David B. Mitzi
Journal of Materials Chemistry
Angular-dependent torque magnetization measurements on a HgBa2CuO4+y microcrystal performed close to the critical temperature Tc 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. © 1999 American Physical Society.
David B. Mitzi
Journal of Materials Chemistry
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