Patent ID: 6309557
Filing Date: 2001-10-30
Classification: H01F,Y10S

Abstract:
A magnetic garnet material grown on a single crystal substrate having a garnet structure with a lattice constant of 1.249 nm or more by a liquid phase epitaxial method, the magnetic garnet material having a magnetic field of 200 Oe required for a saturation, a magnetic compensation temperature of 0.degree. C. or less, and a Faraday rotational capacity of 1,000 deg/cm or more, and represented by the general formula:Bi.sub.x Yb.sub.y Gd.sub.z M1.sub.3-x-y-z Fe.sub.w M2.sub.u M3.sub.5-w-u O.sub.12wherein,M1 is at least one element that can replace Bi, Yb or Gd;M2 is at least one non-magnetic element which can replace Fe;M3 is at least one element which can replace Fe and M2; andx, y, z, w and u satisfy 1.0.ltoreq.x.ltoreq.1.6, 0.3.ltoreq.y.ltoreq.0.7, 0.9.ltoreq.z.ltoreq.1.6, 4.0.ltoreq.w.ltoreq.4.3 and 0.7.ltoreq.u.ltoreq.1.0, respectively.