This report describes a brief overview about the incident ocurred on the Soviet Union (URSS) In 1983. On this date their early warning radar indicated that a US missile was headed towards the URSS, but the alert was a system failure. No catastrophe did not happen because the radar operator was able to analyze the situation and realize that it was a system error. The human experience is even more important that the algorithms.
Raí V. M. da Silva, Rafael O. Mendes, Roberto A. A. Dantas, Rodrigo N. Castro
In this work, we investigate the STO as a detector with in-plane geometry using field modulation Spin Torque ferromagnetic resonance (FM-STFMR), during which microwave signal is injected into the device and output response is measured in terms of RMS voltage across lock-in amplifier. The microwave signal injected externally to STO, efficiently synchronizes signal at two times the frequency of free oscillation of the nanomagnet (f0). The synchronization efficiently enhances signal sensitivity at 2f0 which opens other potential for development of spintronic devices. The effect of synchronization in STO under applied input RF power follows a consistent decrease in sensitivity with increasing power. Better synchronization at 2f0 is noticed above threshold current and shows good agreement with the results of numerical simulations.
En esta práctica utilizamos un láser con el cual medimos los diferentes ángulos resultantes que este hacía cuando era reflejado o refractado con diferentes ángulos de incidencia, con la finalidad de comprobar las leyes de reflexión y refracción de la luz.
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