Faraday-effect magnetic field sensors based on substituted iron garnets

Merritt N. Deeter; Allen H. Rose; Gordon W. Day

doi:10.1117/12.24750

1 February 1991 Faraday-effect magnetic field sensors based on substituted iron garnets

Merritt N. Deeter, Allen H. Rose, Gordon W. Day

Proceedings Volume 1367, Fiber Optic and Laser Sensors VIII; (1991) https://doi.org/10.1117/12.24750
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

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.

Citation Download Citation

Merritt N. Deeter, Allen H. Rose, and Gordon W. Day "Faraday-effect magnetic field sensors based on substituted iron garnets", Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); https://doi.org/10.1117/12.24750

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