Alex Mellnik – Page 2 – Software · Data

Communicating with Thorlabs APT motor controllers

November 7, 2014 admin

We recently added a Thorlabs DC motor controller to our scanning MOKE setup to automate the rotation of a waveplate. Our MOKE setup software is written in c++ using Qt, and we wanted to operate the motor from within the software. Thorlabs provides ActiveX controllers and detailed information on the communications protocol for the controller, but their sample videos on using the ActiveX controllers involve embedding the controls which we would rather not do, and communicating directly with the controller…

ST-FMR

September 24, 2014 admin

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….