Vector magneto-optical sensor based on transparent magnetic films with cubic crystallographic symmetry

The concept of vector magneto-optical magnetometry is proposed and experimentally demonstrated. The key element of the vector magnetometer is a transparent high Faraday activity magnetic film with a cubic crystal lattice. Magnetocrystalline anisotropy of the film leads to the three dimensional traje...

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Bibliographic Details
Published in:Applied physics letters 2016-10, Vol.109 (16)
Main Authors: Rogachev, A. E., Vetoshko, P. M., Gusev, N. A., Kozhaev, M. A., Prokopov, A. R., Popov, V. V., Dodonov, D. V., Shumilov, A. G., Shaposhnikov, A. N., Berzhansky, V. N., Zvezdin, A. K., Belotelov, V. I.
Format: Article
Language:English
Subjects:
Anisotropy
Applied physics
Crystal lattices
Crystallography
Cubic lattice
Dependence
Faraday effect
Magnetic fields
Magnetic films
Magnetic measurement
Magnetism
Magnetization
Optical measuring instruments
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Summary:The concept of vector magneto-optical magnetometry is proposed and experimentally demonstrated. The key element of the vector magnetometer is a transparent high Faraday activity magnetic film with a cubic crystal lattice. Magnetocrystalline anisotropy of the film leads to the three dimensional trajectory of the film magnetization when the magnetization is rotated by the control magnetic field. It makes the magnetization sensitive to all three components of the external magnetic field. This field can be found from the harmonic composition of the Faraday rotation dependence on the azimuth angle of the control magnetic field. The demonstrated vector magnetometer is promising for mapping and visualization of ultra small magnetic fields.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4964887