Abstract
A mutual-inductance bridge designed for measuring the dynamic susceptibility of magnetic fluids at temperatures ranging from −50 to +90°C is described. A specific feature of the bridge is an extended frequency band of the probing field that ranges from infralow frequencies of ∼0.05 Hz to 200 kHz. The formulas that establish relationships between the bridge output signals and the real and imaginary parts of the susceptibility, the testing technique, and the results of testing are presented.
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