US 12,012,668 B2
Bismuth-substituted rare earth iron garnet single crystal, faraday rotator, optical isolator, and method for producing bismuth-substituted rare earth iron garnet single crystal
Toshiaki Watanabe, Annaka (JP); and Satoru Fukuda, Annaka (JP)
Assigned to SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Appl. No. 17/995,989
Filed by Shin-Etsu Chemical Co., Ltd., Tokyo (JP)
PCT Filed Dec. 18, 2020, PCT No. PCT/JP2020/047327
§ 371(c)(1), (2) Date Oct. 12, 2022,
PCT Pub. No. WO2021/215047, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 2020-075707 (JP), filed on Apr. 21, 2020.
Prior Publication US 2023/0212783 A1, Jul. 6, 2023
Int. Cl. C30B 15/20 (2006.01); C30B 15/10 (2006.01); C30B 15/14 (2006.01); C30B 15/30 (2006.01); C30B 29/28 (2006.01); G02F 1/09 (2006.01)
CPC C30B 29/28 (2013.01) [C30B 15/10 (2013.01); C30B 15/14 (2013.01); C30B 15/30 (2013.01); G02F 1/093 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A Bismuth-substituted rare earth iron garnet single crystal characterized by the composition formula (TbaLnbBicMg3−(a+b+c))(FedGaeTifPt5−(d+e+f))O12, wherein in the composition formula above, 0.02≤f≤0.05, 0.02≤{3−(a+b+c)}≤0.08, and −0.01≤{3−(a+b+c)}−{f+5−(d+e+f)}≤0.01, and Ln is a rare earth element selected from Eu, Gd, Ho, Tm, Yb, Lu, and Y.