Observation of magnetic domains in NdCo5using an electro-etching technique

Magnetic domains have been observed in NdCo5using 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 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