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Nonlinear longitudinal and transverse magnetoresistances due to current-induced magnon creation-annihilation processes
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Nonlinear longitudinal and transverse magnetoresistances due to current-induced magnon creation-annihilation processes
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Charge-spin conversion phenomena such as the spin Hall effect allow for the excitation of magnons in a magnetic layer by passing an electric current in an adjacent nonmagnetic conductor. We demonstrate that this current-induced modification of the magnon density generates an additional nonlinear longitudinal and transverse magnetoresistance for every magnetoresistance that depends on the magnetization. Using harmonic measurements, we evidence that these magnon creation-annihilation magnetoresistances dominate the second harmonic longitudinal and transverse resistance of thin Y$_{3}$Fe$_{5}$O$_{12}$/Pt bilayers. Our results apply to both insulating and metallic magnetic layers, elucidating the dependence of the magnetoresistance on applied current and magnetic field for a broad variety of systems excited by spin currents.
Forward citations
Cited by 1 Pith paper
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Impact of current-induced magnons on spin-orbit torque analysis
In Py/Pt bilayers a magnon-related spin-flip unidirectional magnetoresistance appears in second-harmonic Hall data and must be included to obtain reliable spin-orbit torque values over broad field ranges.
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