Magnetothermodynamic measurement error through use of a superconducting solenoid in the persistent mode.
When a superconducting solenoid is operated in the persistent mode, a variation in the magnetization of a sample (produced by a temperature change) enclosed by the solenoid will produce a modification in the solenoid current. Equations are developed for calculating this effect on the superconducting current and the related magnetic field change. A specific example is given on the error produced in heat capacity measurements.
Fisher
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Low Temperature Laboratory, Departments of Chemistry and Chemical Engineering, University of California, Berkeley, California 94720.