Theoretical Study of Spin-Torque Oscillator with Perpendicularly Magnetized Free Layer

Abstract

The magnetization dynamics of spin torque oscillator (STO) consisting of a perpendicularly magnetized free layer and an in-plane magnetized pinned layer was studied by solving the Landau-Lifshitz-Gilbert equation. We derived the analytical formula of the relation between the current and the oscillation frequency of the STO by analyzing the energy balance between the work done by the spin torque and the energy dissipation due to the damping. We also found that the field-like torque breaks the energy balance, and change the oscillation frequency.

4 pages, 4 figures, presented at ISAMMA 2013

References in corpus (6)

• Bias-driven large power microwave emission from MgO-based tunnel magnetoresistance devices
• Spin-transfer torque in magnetic tunnel junctions: Scattering theory
• Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques
• Large amplitude microwave emission and reduced nonlinear phase noise in Co2Fe(Ge0.5Ga0.5) Heusler alloy based pseudo spin valve nanopillars
• Theory of spin accumulation and spin transfer torque in a magnetic domain wall
• Dipolar field effect on microwave oscillation in a domain wall spin-valve

Cited by in corpus (5)

• Self-Oscillation in Spin Torque Oscillator Stabilized by Field-like Torque
• Linewidth of Power Spectrum Originated from Thermal Noise in Spin Torque Oscillator
• Influence of field-like torque in synchronization of spin torque oscillators
• Zero-field dynamics stabilized by in-plane shape anisotropy in MgO-based spin-torque oscillators
• Role of Magnetic Field in Self-Oscillation of Nanomagnet Excited by Spin Torque