Effects of sample rotation on de Haas – van Alphen oscillations

Abstract

It is shown that the elastic compliance of a crystal mount, coupled with the sinusoidal nature of the de Haas – van Alphen torque versus magnetic field and angle, causes nonlinearities in the measured oscillations. The equations are formally the same as those describing the magnetic interaction in the de Haas – van Alphen effect. Hysteresis effects can result from the torque effects. Measurements of the torque de Haas – van Alphen oscillations in arsenic are in quantitative agreement with theory and the measured angular compliance of the torque magnetometer. Other effects of a compliant crystal mount are also discussed. The relative strengths of the torque effect and magnetic interaction are compared, and it is indicated by calculations for typical crystal mounts that torque effects may dominate unless care is taken to ensure a rigid sample mount.