摘要 |
A hard magnetic Bi-substituted rare earth iron garnet material with excellent Faraday rotary moment, temperature property, wavelength property and insertion loss is provided. A Bi-substituted rare earth iron garnet material having a chemical composition of (Bi<SUB>3-a-b-c</SUB>Gd<SUB>a</SUB>Tb<SUB>b</SUB>Yb<SUB>c</SUB>) Fe<SUB>(5-w)</SUB>M<SUB>w</SUB>O<SUB>12 </SUB>(where, M is at least one element selected from the group consisting of Ga, Al, Ge, Sc, In, Si and Ti, 0.5<=a+b+c<=2.5, 0.2<=w<=2.5) can be provided with hard magnetism and have excellent Faraday rotary moment, temperature property, wavelength property and insertion loss.
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