## ST-FMR

I’ve noticed that the useful calculations for spin torque ferromagnetic resonance (ST-FMR) are normally only glossed over in papers, although they can often be found buried in dissertations. Here’s a quick introduction to anyone who wants to do their own further calculations or analysis. This covers the simple case of a rectangular geometry with an in-plane magnetic material, with the applied field also in-plane at some angle to the direction of the current, and includes the possibility of DC torques….