Accession Number : ADD005532

Title :   Magnetometer Using a Field Controlled Oscillator, the Oscillator Core Being Maintained Near Its Curie Point.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Kirkland,James L

Report Date : 15 Aug 1978

Pagination or Media Count : 6

Abstract : A magnetometer wherein inductance of a resonant circuit is made sensitive to changes in magnetic field to vary an oscillator operating frequency. The magnetometer utilizes a ferromagnetic sensor element that is characterized by high permeability in weak magnetic fields when the element is maintained at predetermined elevated temperatures near the Curie point of the element material and also exhibits a hysteresis curve having a steep slope in the region of field strengths on the order of the earth's magnetic field. The preferred embodiment includes resistive heating of the element and use of substantially pure iron as the element material. (Author)

Descriptors :   *Patents, *Magnetometers, Radiofrequency oscillators, Ferromagnetic resonance, High temperature, Curie temperature, Iron

Subject Categories : Administration and Management
      Geomagnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE