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Spin-Torque Nano-Oscillator: Phase Portrait

2D macrospin phase-portrait simulator of a spin-torque nano-oscillator: watch the in-plane magnetization projection (m_x, m_y) trace a spiral or a closed limit-cycle ring as Gilbert damping and Slonczewski spin-torque compete, with linked time-domain scopes and a live-built frequency-vs-drive characteristic.

Physics & Mechanics2DAdvanced60 FPS📱 Mobile-adapted⇄ 3D version

A spin-torque nano-oscillator (STNO) turns a steady DC current into a continuous microwave-frequency signal, with no external RF source and no moving parts. This 2D companion integrates the same Landau-Lifshitz-Gilbert-Slonczewski macrospin equation in real time, but instead of a 3D camera view it plots the magnetization's transverse projection directly as a phase portrait: a decaying spiral for a damped device, and a closed ring for a self-sustained microwave limit cycle. Drag and scroll to explore the orbit, watch the linked time-domain scopes for m_z and output power, and sweep the drive slider to trace out the frequency red-shift live on the fourth panel — exactly the characteristic used to tune real STNO read heads and neuromorphic oscillator networks.

⚙ Under the hood

spintronicsspin torquenano-oscillatormagnetization dynamicsmicrowaveSTNO

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install