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Ukr. J. Phys. 2015, Vol. 59, N 11, p.1083-1087
doi:10.15407/ujpe59.11.1083    Paper

Linchevskyi I.V., Shevchenko T.I.

National Technical University of Ukraine “Kyiv Polytechnical Institute”
(37, Peremogy Ave., Kyiv 03056, Ukraine; e-mail: igorvl2009@gmail.com)

Application of Magneto-Optical Crystals for Mechanical Stress Registration

Section: Solid matter
Original Author's Text: Ukrainian

Abstract:The theory of inverse magneto-mechanical effect in cubic crystals has been developed. The proposed model involves changes of the magnetostrictive material magnetization in the external polarizing magnetic field when creating a compression-tension or shear deformation. The magnetic field direction is shown to significantly affect the inverse magneto-mechanical effect. Using the bismuth yttrium ferrite garnet as an example, it is demonstrated that the Villari effect in combination with optical methods used to register magnetization changes enables one to measure minimum stresses at a level of 10−4 Pam for compression-tension deformations and 10−3 Pa•m for shear ones.

Key words: Faraday effect, Villari effect, magneto-optical crystal, deformation.