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Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states

Abstract : We investigated spin injection by spin pumping from a spin-injector(NiFe) into a spin-sink to detect spin fluctuations in the spin-sink. By scanning the ordering-temperature of several magnetic transitions, we found that enhanced spin pumping due to spin fluctuations applies with several ordering states: ferromagnetic(Tb) and antiferromagnetic(NiO, NiFeOx, BiFeO3, exchange-biased and unbiased IrMn). Results also represent systematic experimental investigation supporting that the effect is independent of the metallic and insulating nature of the spin-sink, and is observed whether the spin current probe involves electronic or magnonic transport, facilitating advances in material characterization and engineering for spintronic applications.
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Submitted on : Thursday, November 21, 2019 - 5:30:39 PM
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Olga Gladii, Lamprini Frangou, Guillaume Forestier, Rafael Lopes Seeger, Stephane Auffret, et al.. Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states. Applied Physics Express, IOPScience - Japan Society of Applied Physics, 2019, 12 (2), pp.023001. ⟨10.7567/1882-0786/aaf4b2⟩. ⟨hal-02331791⟩

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