Role of thermal noise in Current Induced Oersted Field based Magneto Resistance Tilted Polarizer Spin Torque Nano Oscillator - A macro-magnetic analysis.

Here, tShe authors have designed a heterogeneous Current Induced Oersted Field based Magneto Resistance Tilted Polarizer-Spin Torque Nano Oscillator [CIOF-MRTP-STNO] in a theoretical manner. The idea of the work is to investigate the impact of thermal noise on the frequency as well the PSD of the above modelled device by including the H_th in the H_eff by macro-magnetic approach. The magnetization precession dynamics guided by Spin Transfer Torque [STT] is studied numerically by solving the governing equation called Landau-Lifshitz-Gilbert-Slonczewski [LLGS]. Here, β is the independent tilt angle of the fixed layer and θ is the angle between free layer magnetization and the easy axis of the device, respectively. In the device, both the angles β and θ can be varied from 10° to 90° as an accretion of 10°. The maximum frequency of the modeled device is about 197 GHz and PSD of 1.67 µW/mA²/GHz in the presence of thermal noise with H_oe = 50 kA/m (in the presence of CIOF), but in the absence of thermal noise, the frequency and the PSD emitted by the device is reduced to 180 GHz and 1.63 µW/mA²/GHz. On the other hand, in the presence of thermal noise with H_oe=0 kA/m (in the absence of CIOF), the device emits the frequency and PSD of 137 GHz and 1.51 µW/mA²/GHz, but in the absence of thermal noise, the frequency and the PSD emitted by the device is reduced to 125 GHz and 1.48 µW/mA²/GHz. The author suggests that the modeled device is applicable to High-Frequency applications. [ABSTRACT FROM AUTHOR]