| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a magneto-optical element which has a RIG membrane with a low insertion loss at an optocommunication wave length of 1.3-1.6μm; and a method for stably producing the RIG membrane for a magneto-optical element with a high yield by using an LPE method. <P>SOLUTION: A specified amount of an impurity is added to a melt so that Fe present in a RIG membrane after its growth is substantially trivalent and tetravalent (or divalent) and is not made divalent (or tetravalent) by a heat treatment conducted after the growth. After the above addition of the impurity, a RIG membrane is grown from the melt on a nonmagnetic garnet substrate by a liquid-phase epitaxial method. Then, the nonmagnetic garnet substrate is removed, and the RIG membrane is heat treated in a reducing (or oxidizing) atmosphere. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
