Observation of magnetic domains in NdCo5using an electro-etching technique

Magnetic domains have been observed in NdCo
5
using an electro-etching technique. Electro-etching in an applied magnetic filed yields a surface record of the field related domain structure that can be viewed using a light microscope without polarizers. High contrast between oppositely magnetized domains can be obtained on surfaces both parallel and perpendicular to the
c
axis. The effect of increasing the magnetic field to the point where circular or spike domains are obtained is shown and other etching variables are discussed