LPE grown, substituted YIG crystals have coercivities (H//c) in the 10** minus **1 Oe range, depending on compositions and growth conditions. Dislocations, inclusions and surfaces cannot be fully responsible for the observed H//c. TEM investigations of CaGeSmYIG films have revealed a periodically modulated stress field that - via magnetostrictive stresses - may explain the FMR line broadening and the measured H//c. The mechanism, thought to be the spinodal decomposition of the garnet, causes FMR line broadening up to 200-300 Oe, i. e. more than the relaxation of Sm**3** plus ions.
|Journal||IEEE Transactions on Magnetics|
|Publication status||Published - Sep 1 1984|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering