Amorphous Layer for Bubble Propagation and Sensing
Original Publication Date: 1980-Aug-01
Included in the Prior Art Database: 2005-Feb-13
Amorphous magnetic materials having in-plane magnetization can be used both for driving bubble domains and for sensing bubble domains in an adjacent bubble material. These materials have large magnetic moments and small coercivities, and they are particularly suitable in bubble devices using very small bubble domains. An example of an amorphous composition suitable for a drive layer is a composition of Fe-Co or Fe-B or Co-B, with B as the glass stabilizer. These materials have been made amorphous with zero magnetostriction, and exhibit high magnetic moment, low coercivity, and a relatively high crystallization temperature. A material such as this can be magnetic field annealed to give magnetic anisotropy.