Title:
BI-SUBSTITUTED RARE EARTH IRON GARNET SINGLE CRYSTAL, METHOD FOR PRODUCING SAME, AND OPTICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/152333
Kind Code:
A1
Abstract:
Provided is a Bi-substituted rare earth iron garnet single crystal, which has a composition represented by R3-xBixFe5-wAwO12 (R must contain Gd, and may optionally contain at least one rare earth element selected from a group consisting of Y, Eu, Gd, Ho, Yb, Lu, Nd, Tm, La, Sm, Dy, Er, Ce, and Pr; A represents at least one element selected from a 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; x is 0.7 < x ≤ 1.5; w is 0 < w ≤ 1.5), does not contain Pb but contains Pt, and contains Mn or at least one element M from the group II elements; when [M] represents concentration (atppm) of M in the aforementioned single crystal, [Pt] represents concentration (atppm) of Pt, and the relational expression Δ is represented as Δ = (α x [M]) - [Pt], then a coefficient α is set at a value within the numerical range of 0.815 ± 0.035, and Δ is set within the range of -0.40atppm to 3.18atppm. Thus, a garnet crystal not containing lead, and with an IL of not more than 0.10dB, is provided.
Inventors:
SHIROKI Kenichi (8-22, Shinden 3-Chome Adachi-ku Tokyo, 11, 〒1238511, JP)
白木 健一 (〒11 東京都足立区新田３丁目８番２２号 Tokyo, 〒1238511, JP)
FUKUHARA Takashi (5-1 Aza Koyashikizoe, Oaza Shimomenaisaw, Kuroishi-shi Aomori 39, 〒0360539, JP)
白木 健一 (〒11 東京都足立区新田３丁目８番２２号 Tokyo, 〒1238511, JP)
FUKUHARA Takashi (5-1 Aza Koyashikizoe, Oaza Shimomenaisaw, Kuroishi-shi Aomori 39, 〒0360539, JP)
Application Number:
JP2011/062326
Publication Date:
December 08, 2011
Filing Date:
May 30, 2011
Export Citation:
Assignee:
NAMIKI SEIMITSU HOUSEKI KABUSHIKIKAISHA (8-22, Shinden 3-Chome Adachi-ku Tokyo, 11, 〒1238511, JP)
並木精密宝石株式会社 (〒11 東京都足立区新田３丁目８番２２号 Tokyo, 〒1238511, JP)
SHIROKI Kenichi (8-22, Shinden 3-Chome Adachi-ku Tokyo, 11, 〒1238511, JP)
白木 健一 (〒11 東京都足立区新田３丁目８番２２号 Tokyo, 〒1238511, JP)
並木精密宝石株式会社 (〒11 東京都足立区新田３丁目８番２２号 Tokyo, 〒1238511, JP)
SHIROKI Kenichi (8-22, Shinden 3-Chome Adachi-ku Tokyo, 11, 〒1238511, JP)
白木 健一 (〒11 東京都足立区新田３丁目８番２２号 Tokyo, 〒1238511, JP)
International Classes:
C30B29/28; C01G49/00; C30B19/02; G02F1/09; H01F10/24
Attorney, Agent or Firm:
NAMIKI SEIMITSU HOUSEKI KABUSHIKIKAISHA (8-22, Shinden 3-Chome Adachi-ku Tokyo, 11, 〒1238511, JP)
Claims:
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