Article Dans Une Revue Physical Review Applied Année : 2021

Tunable Exchange-Bias-Like Effect in Bi-Substituted Gadolinium Iron Garnet Film

Résumé

Using magneto-optical Faraday and Kerr measurements, we investigate the magnetic and magnetooptical properties of a thick Bi-substituted gadolinium iron garnet film over a broad range of wavelengths (250-850 nm) and temperatures (150-300 K), including the magnetization compensation point, T M. We observe an exchange-bias-like effect in the vicinity of T M. By slightly changing the sample temperature, we can precisely tune the bias field, which reaches a magnitude 6 times higher than the coercive field. We explain this phenomenon by considering the short-range superexchange interaction and a change in the magnetic behavior when moving from the surface to the bulk of the film. This finding may lead to the development of single-film magneto-optical devices based on the exchange-bias effect.

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hal-04158293 , version 1 (11-07-2023)

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Marwan Deb, Pierre Molho, Bernard Barbara. Tunable Exchange-Bias-Like Effect in Bi-Substituted Gadolinium Iron Garnet Film. Physical Review Applied, 2021, 15 (5), pp.054064. ⟨10.1103/physrevapplied.15.054064⟩. ⟨hal-04158293⟩

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