Journal of Applied Physics · 1959 · 415 citations · 4 references
Natural SciencesElectrical EngineeringMaterials ScienceElectromagnetismMaterials CharacterizationMetallic MaterialsCurrent Measurement InstrumentsElectrical CharacterizationElectrical ConductivityElectrical MeasurementElectrical Resistivity MethodsMetalsEddy Current AnalysisEddy Current SensingEddy Current TestingResistivity Measurement
The paper presents a method for measuring the resistivity of metallic specimens. The method measures resistivity by observing the decay of magnetic flux from a bar in a rapidly zeroed external field, works for specimens larger than 5 × 10⁻³ cm in diameter, requires no contact, and can determine local resistivity. For a 1 cm diameter specimen, the method measures resistivities between 10⁻¹¹ and 10⁻³ Ω·cm with less than 3 % error, and several applications are demonstrated.
A method for measuring the resistivity of metallic specimens is described. The measurement is made by noting the rate of decay of flux from a bar situated in an external magnetic field that has been rapidly reduce to zero. The method is suitable for specimens greater than 5×10−3 cm in diameter. For a specimen 1 cm in diameter, resistivities from 10−11 to 10−3 ohm-cm may be measured with an error of less than three percent. The method requires no contact to the specimen, and local values of resistivity may be measured. Several applications are described.
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