Review of Scientific Instruments · 1954 · 19 citations · 1 references
Natural SciencesBiophysicsElectromagneticsElectromagnetismMagnetic MaterialsMagnetic CharacterizationMagnetic SusceptibilityRelaxation MechanismsSuperconducting Magnet SystemsTemperature MeasurementCryogenic InstrumentationMagnetic Property MeasurementMagnetic Relaxation MeasurementsMagnetic Susceptibility MeasurementMutual InductanceTemperature Dependence Of Magnetic PropertiesTemperature-dependent Magnetic SusceptibilityThermal Demagnetization
A mutual inductance bridge and cryostat are described which may be used to measure susceptibilities from 77°K, with liquid nitrogen, down to adiabatic demagnetization temperatures. In addition to the sensitivity necessary for measurements over such a temperature interval, the apparatus provides the following features: a usable frequency range of 5 kc, for the study of paramagnetic relaxation and paramagnetic specific heat; measurement of longitudinal susceptibilities in fields up to 3000 oersted, and transverse susceptibilities in fields up to 13 000 oersted; a simple method for changing samples with a minimum dismantling of the equipment.
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