Sensitivity of spin-torque diodes for frequency-tunable resonant microwave detection
arXiv:0905.1912 · doi:10.1063/1.3197137
Abstract
We calculate the efficiency with which magnetic tunnel junctions can be used as resonant detectors of incident microwave radiation via the spin-torque diode effect. The expression we derive is in good agreement with the sensitivities we measure for MgO-based magnetic tunnel junctions with an extended (unpatterned) magnetic pinned layer. However, the measured sensitivities are reduced below our estimate for a second set of devices in which the pinned layer is a patterned synthetic antiferromagnet (SAF). We suggest that this reduction may be due to an undesirable coupling between the magnetic free layer and one of the magnetic layers within the etched SAF. Our calculations suggest that optimized tunnel junctions should achieve sensitivities for resonant detection exceeding 10,000 mV/mW.
17 pages, 2 figures
References in corpus (14)
- Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
- Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
- Spin Transfer Torques
- Measurement of the Spin-Transfer-Torque Vector in Magnetic Tunnel Junctions
- Bias-driven large power microwave emission from MgO-based tunnel magnetoresistance devices
- Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
- Spin-Transfer Effects in Nanoscale Magnetic Tunnel Junctions
- Anomalous Bias Dependence of Spin Torque in Magnetic Tunnel Junctions
- Magnetoresistance and spin-transfer torque in magnetic tunnel junctions
- Adjustable spin torque in magnetic tunnel junctions with two fixed layers
- Bias and angular dependence of spin-transfer torque in magnetic tunnel junctions
- Current-driven ferromagnetic resonance, mechanical torques and rotary motion in magnetic nanostructures
- Spin-torque driven ferromagnetic resonance of Co/Ni synthetic layers in spin valves
- Theory of the spin-torque-driven ferromagnetic resonance in a ferromagnet/normal-metal/ferromagnet structure
Cited by in corpus (14)
- Giant spin-torque diode sensitivity at low input power in the absence of bias magnetic field
- Skyrmion based microwave detectors and harvesting
- Stochastic resonance of a nanomagnet excited by spin transfer torque
- Micromagnetic understanding of stochastic resonance driven by spin-transfertorque
- Magnetoresistive Sensor Detectivity: A Comparative Analysis
- Noise properties of a resonance-type spin-torque microwave detector
- Spin-Torque Diode Measurements of MgO-Based Magnetic Tunnel Junctions with Asymmetric Electrodes
- Influence of the Dzyaloshinskii-Moriya interaction on the spin-torque diode effect
- Rapid microwave phase detection based on a solid state spiontronic device
- High sensitivity microwave detection using a magnetic tunnel junction in the absence of an external applied magnetic field
- Dependence of spin torque diode voltage on applied field direction
- Maximizing Spin Torque Diode Voltage by Optimizing Magnetization Alignment
- Biaxial magnetic field setup for angular magnetic measurements of thin films and spintronic nanodevices
- Spin-Torque and Spin-Hall Nano-Oscillators