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Proceedings Paper

Faraday-effect magnetic field sensors based on substituted iron garnets
Author(s): Merritt N. Deeter; Allen H. Rose; Gordon W. Day
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Paper Abstract

The class of ferrimagnetic materials known as substituted iron garnets display characteristics which make them suitable for applications of magnetometry requiring high sensitivity, high spatial resolution, or high speed. Diamagnetic substitution, in which specific iron ions are replaced by diamagnetic ions, reduces the saturation magnetization and increases the sensitivity. We find that the sensitivity of a composition of gallium-substituted yttrium iron garnet is six times greater than of pure yttrium iron garnet. The noise-equivalent magnetic field for a sample of this material has been measured as approximately 100 pT/THz.

Paper Details

Date Published: 1 February 1991
PDF: 6 pages
Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); doi: 10.1117/12.24750
Show Author Affiliations
Merritt N. Deeter, National Institute of Standards and Technology (United States)
Allen H. Rose, National Institute of Standards and Technology (United States)
Gordon W. Day, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 1367:
Fiber Optic and Laser Sensors VIII
Ramon P. DePaula; Eric Udd, Editor(s)

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