Relationship Of Magnetic Domains And Physical Properties In Garnet Bubble Materials

There has been a rising interest in magnetic domain analysis in recent years. Magnetic domain is the important elements of the microstructure of magnetic materials that link the physical properties of a material and applications. In this paper, the domains in the garnet bubble films are observed using the Faraday polarized light microscope, and the domain photos are obtained by photomicrography. The observed results are summarized as follows:The domain pictures are obtained in different crystal directions by photomicrography. It was found that the relations of some static parameters of the samples and the cubic magnetocrystalline anisotropy. The domain character has been of technological interest. The crystal directions can be confirmed by the characters in the domains. We find that the strip domains of demagnetization in <112> crystal direction are parallel to the direction, and in <110> crystal direction not that. This means the demagnetization domains are related to the magnetocrystalline anisotropy.A series of domains were photographed at different temperature by photomicrography. We find the relations of the physical properties of the samples and the temperature. It shows the equilibrium separation about two neighbouring increase with increasing temperature. The photos also provides a more detailed description about hard domains temperature stability. The findings above imply that the ultra-high-density Bloch line memory scheme (BLM) has a disadvantage.A series of photos about hard domains and dumbbell rotation in pulsed bias field are obtained by two or three times exposal technology. It directly shows the relation between the direction of dumbbell domain rotation and the methods of form hard domains, and the dumbbell rotation direction can be reversed by means of increasing the amplitude of pulsed bias field. The findings above also imply that the BLM scheme has a bug.