Switching of Co magnetization driven by antiferromagnetic-ferromagnetic phase transition of FeRh alloy in Co/FeRh bilayers

P. Dr\'o\.zd\.z , M. \'Sl\k{e}zak , K. Matlak , B. Matlak , K. Freindl , J. Korecki , T. \'Sl\k{e}zak

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classification ❄️ cond-mat.mes-hall

keywords ferhafm-fmdriventemperaturetransitionantiferromagnetic-ferromagneticbilayersmagnetization

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We show that Co spins in Co/FeRh epitaxial bilayers grown on W(110) switch reversibly between the two orthogonal in-plane directions as the FeRh layer undergoes temperature driven antiferromagnetic-ferromagnetic (AFM-FM) phase transition. Switching of Co magnetization is characterized by a hysteretic behavior owing to a temperature hysteresis of the AFM-FM transition in FeRh. The spin reorientation of Co is driven by the evolution interfacial exchange coupling to FeRh system across the AFM-FM process. Our results provide a new method of writing information purely by a local temperature change.

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Switching of Co magnetization driven by antiferromagnetic-ferromagnetic phase transition of FeRh alloy in Co/FeRh bilayers

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