| 摘要 |
It is an object of the present invention to provide a magnetic garnet single crystal at a reduced Pb content, and a method for producing the same and an optical element using the same. The object is attained with a magnetic garnet single crystal represented by the chemical formula Bi<SUB>alpha</SUB>Na<SUB>beta</SUB>M1<SUB>3-alpha-beta</SUB>Fe<SUB>5-gamma</SUB>M2<SUB>gamma</SUB>O<SUB>12 </SUB>(M1 is at least one element selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and M2 is at least one element selected from Si, Ge and Ti, provided that 0.5<alpha<=2.0, 0<beta<=0.8, 0.2<=3-alpha-beta<2.5, and 0<gamma<=1.6).
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