Automatic mutual inductance bridge for accurate ac susceptibility measurements from 1.2 to 300 K

Autor:	A. F. Deutz, F. J. Kranenburg, R. Hulstman
Rok vydání:	1989
Předmět:	Physics Magnetometer Magnetic susceptibility Computational physics Magnetic field law.invention Inductance Nuclear magnetic resonance law Electrical network Personal computer Calibration Instrumentation Noise (radio)
Zdroj:	Review of Scientific Instruments. 60:113-120
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1140593
Popis:	We describe a completely computer‐driven sensitive ac susceptometer for experiments at frequencies between 10 Hz and 5 kHz in the temperature range from 1.2 to 300 K and in magnetic fields from 0 to 6 T. The susceptibility is measured by moving the sample between the secondary coils, which form part of a mutual inductance bridge controlled by a personal computer. The temperature is regulated by a newly developed clamped PI algorithm. The calibration procedure is described as well as the experimental control program. Absolute values of the susceptibility are measured with an accuracy of 2% with a lower limit set by the noise of 10−12 m3 (or about 10−7 emu). Typical experimental results are presented.
Databáze:	OpenAIRE
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