| Abstract: | The principle of measurement of small magnetic moments using superconducting null-picovoltmeter (SNPV) is described. It is shown that in the mode with optimal voltage sensitivity (≥10–12 V), the sensitivity of SNPV to a magnetic moment can reach 10–8 emu, the level only implemented in SQUIDs. An example is given of using SNPV to measure the magnetic susceptibility of superconducting diamagnetic and paramagnetic samples, approximately 1 mm3 in volume, with different signs of the magnetization in the magnetizing alternating magnetic fields with induction of about 1 G, at low temperatures. |
