Models for the pinning of domain walls in Sm(Co,Fe,Cu,Zr)z type magnets at finite temperatures

We discuss simulation results of three different models for the pinning of the domain walls in permanent magnets as a function of temperature. They correspond to pinning of the wall by periodic arrays of planes, faces of cubes and pyramids. The pinning potential can repel or attract the domain walls. The simulation results are compared with recent experimental data for the 2:17 magnets. (C) 1999 American Institute of Physics. [S0021-8979(99)24108-4].