Electrical rectification effect in single domain magnetic microstrips: a micromagnetics-based analysis

Abstract

Upon passing an a.c. electrical current along magnetic micro- or nanostrips, the measurement of a d.c. voltage that depends sensitively on current frequency and applied field has been recently reported by A. Yamaguchi and coworkers. It was attributed to the excitation of spin waves by the spin transfer torque, leading to a time-varying anisotropic magnetoresistance and, by mixing of a.c. current and resistance, to a d.c. voltage. We have performed a quantitative analysis by micromagnetics, including the spin transfer torque terms considered usually, of this situation. The signals found from the spin transfer torque effect are several orders of magnitude below the experimental values, even if a static inhomogeneity of magnetization (the so-called ripple) is taken into account. On the other hand, the presence of a small non-zero average Oersted field is shown to be consistent with the full set of experimental results, both qualitatively and quantitatively. We examine, quantitatively, several sources for this average field and point to the contacts to the sample as a likely origin.

to be published in Journal of Applied Physics

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Cited by in corpus (7)

• FMR-related phenomena in spintronic devices
• Intrinsic spin-orbit torque arising from Berry curvature in metallic-magnet/Cu-oxide interface
• Anomalous Hall voltage rectification and quantized spin-wave excitation induced by the simultaneous dc- and rf-current application in Ni81Fe19 wire
• Rectification of radio frequency current in giant magnetoresistance spin valve
• Electric-field tunable spin diode FMR in patterned PMN-PT/NiFe structures
• Electric-field tunable spin waves in PMN-PT/NiFe heterostructure: experiment and micromagnetic simulations
• Detection of domain wall eigenfrequency in infinity-shaped magnetic nanostructures