Field- and temperature-modulated spin-diode effect in a GMR nanowire with dipolar coupling

Abstract

An analytical model of the spin-diode effect induced by resonant spin-transfer torque in a ferromagnetic bilayer with strong dipolar coupling provides the resonance frequencies and the lineshapes of the magnetic field spectra obtained under field or laser-light modulation. The effect of laser irradiation is accounted for by introducing the temperature dependence of the saturation magnetization and anisotropy, as well as thermal spin-transfer torques. The predictions of the model are compared with experimental data obtained with single Co/Cu/Co spin valves, embedded in nanowires and produced by electrodeposition. Temperature modulation provides excellent signal-to-noise ratio. High temperature-modulation frequency is possible because these nanostructures have a very small heat capacity and are only weakly heat-sunk. The two forms of modulation give rise to qualitative differences in the spectra that are accounted for by the model.

References in corpus (7)

• Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
• Thermal Spin-Transfer Torques in Magnetoelectronic Devices
• Electrical Detection of Magnetization Dynamics via Spin Rectification Effects
• Spin torque resonant vortex core expulsion for an efficient radio-frequency detection scheme
• Giant thermal spin torque assisted magnetic tunnel junction switching
• Modification of the Bloch law in ferromagnetic nanostructures
• Rectification of radio frequency current in giant magnetoresistance spin valve

Cited by in corpus (2)

• Holographic Vector Field Electron Tomography of Three-Dimensional Nanomagnets
• Structural, magnetostatic and magnetodynamic studies of Co/Mo-based uncompensated synthetic antiferromagnets