Home▸Materials Science▸Spintronics GMR Effect Simulator

🧲 Spintronics and the GMR Effect

An interactive 3D magnetic multilayer stack where flipping an external field aligns or misaligns electron spins across layers, changing simulated resistance via the giant magnetoresistance (GMR) effect.

Materials Science3DModerate60 FPS⚡ Plasma

A 3D magnetic multilayer stack lets you sweep an external field and watch the layers' magnetizations swing from antiparallel to parallel, while electrons flowing through the stack show, in real time, how spin-dependent scattering turns that magnetic alignment into a measurable change in electrical resistance.

🔬 What It Demonstrates

A two-current (Mott) resistor model computes separate spin-up and spin-down channel resistances from each layer's magnetization angle; the channels combine in parallel, so a mismatched majority-spin channel dominates and resistance spikes in the antiparallel state.

🎮 How to Use

Drag the external field slider past the coupling threshold to flip the stack from antiparallel to parallel and watch the relative resistance readout fall. Adjust spacer thickness to change how much field it takes, or click auto-sweep to watch it switch continuously.

💡 Did You Know?

Fert and Grünberg's 1988 discovery of GMR reached commercial hard-drive read heads by 1997 and won the 2007 Nobel Prize in Physics — it remains one of the fastest lab-to-industry transitions in condensed-matter physics.

⚙ Under the hood

Interactive 3D multilayer thin-film stack where flipping magnetic layer alignment shows how the giant magnetoresistance effect switches electrical resistance, enabling dense hard drives.

spintronicsgiant-magnetoresistancethin-filmsmagnetic-materialshard-drive-technologymaterials-science

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install