Bi-substituted rare earth iron garnet single crystal, method for producing same, and optical device

摘要

A Bi-substituted rare earth iron garnet single crystal has a composition of R3-xBixFe5-wAwO12 (wherein R denotes one or more rare earth elements among Tb, Y, Eu, Gd, Ho, Yb, Lu, Nd, Tm, La, Sm, Dy, Er, Ce, and Pr and inevitably include Tb; A denotes one or more elements among Ga, Al, In, Sc, Co, Ni, Cr, V, Ti, Si, Ge, Mg, Zn, Nb, Ta, Sn, Zr, Hf, Pt, Rh, Te, Os, Ce, and Lu, 0.7

主权项

1. A Bi-substituted rare earth iron garnet single crystal which has a composition of R3-xBixFe5-wAwO12, wherein R denotes only Tb or Tb and one or more rare earth elements selected from the group consisting of Y, Eu, Gd, Ho, Yb, Lu, Nd, Tm, La, Sm, Dy, Er, Ce, and Pr, A denotes one or more elements selected from the group consisting of Ga, Al, In, Sc, Co, Ni, Cr, V, Ti, Si, Ge, Mg, Zn, Nb, Ta, Sn, Zr, Hf, Pt, Rh, Te, Os, Ce, and Lu, 0.7 the Bi-substituted rare earth iron garnet single crystal does not contain Pb and contains Pt, and additionally contains Mn or at least one Group 2 element, and wherein, when M denotes the Mn or at least one Group 2 element, [M] denotes M concentration (atppm) and [Pt] denotes Pt concentration (atppm) in the Bi-substituted rare earth iron garnet single crystal, and a relational expression Δ of [M] and [Pt] is represented by an equation below:
Δ=[M]−(α×[Pt]),where a coefficient α is set to any value within a numerical range of 0.91±0.05 and Δ is set no less than −7.23 atppm and no more than 1.64 atppm.