A new method for measuring the amplitude of de Haas-van Alphen oscillations

Quantum (dHvA) oscillations in the diamagnetic susceptibility of a metal at low temperatures are usually studied by a torque balance or by the field modulation technique of Shoenberg and Stiles. A new method of measuring dHvA amplitudes in indium using a superconducting flux transformer and a ferrite core flux gate magnetometer is reported. The magnitude of the magnetization is typically 10-6T at 1K which is considerably greater than the minimum detectable signal of the magnetometer, and shielding the sensor from the magnetizing field of up to 4T is the main experimental problem. (Auth.)