A high-precision method to study the Fermi surface and its pressure dependence using the de Haas-van Alphen effect

Abstract

A new system has been developed for measuring de Haas-van Alphen (DHVA) frequency shifts due to the application of hydrostatic pressure. Increased accuracy is obtained by using a second DHVA system as the field-interval-determining device. Field-measuring errors are reduced by about one order of magnitude relative to those obtained using the magnet current as the field indicator. The result is a reproducibility in frequency determination of +or-15 ppm for both simple and highly complex DHVA signals. Some results of measurements of the DHVA frequency change due to hydrostatic pressure are reported. More general applicability to accurate Fermi surface dimension determination is noted.