Anisotropy scaling close to the ab plane in (formula presented) by torque magnetometry

Abstract

The effective mass anisotropy ratio γ is generally determined relative to the main axes of a superconductor. Torque measurements with arbitrary field orientations, especially near the ab plane, are presented. The scaling of the apparent anisotropy ratio (Formula presented) is verified also very close to the ab plane in the highly anisotropic (Formula presented) This method allows a very precise determination of (Formula presented) and shows the importance of the field orientation for ab-plane measurements. © 1999 The American Physical Society.