Claims
- 1. A magneto-optical element for a magnetic field sensor comprising: a Bi-substituted rare-earth iron garnet crystal expressed by the following general formula (formula 1):
- (Bi.sub.X Gd.sub.Y R.sub.Z Y.sub.3-X-Y-Z) (Fe.sub.5-W Ga.sub.W)O.sub.12 (formula 1)
- wherein the value of X is 0.8.ltoreq.X.ltoreq.1.3, the value of Y is 0.2.ltoreq.Y.ltoreq.0.4, the value of Z is 0.1.ltoreq.Z.ltoreq.0.9, the value of W is 0.ltoreq.W.ltoreq.0.3, and R is at least one kind of element selected from rare-earth elements.
- 2. A magneto-optical element for a magnetic field sensor in accordance with claim 1, wherein
- the Bi-substituted rare-earth iron garnet crystal is epitaxially grown on a garnet crystal substrate.
- 3. A magneto-optical element for a magnetic field sensor in accordance with claim 2, wherein
- the garnet crystal substrate is a Ca--Mg--Zr-substituted Gd.sub.3 Ga.sub.5 O.sub.12 substrate or a Nd.sub.3 Ga.sub.5 O.sub.12 substrate.
Priority Claims (2)
Number |
Date |
Country |
Kind |
5-69631 |
Mar 1993 |
JPX |
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5-130817 |
Jun 1993 |
JPX |
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Parent Case Info
This application is a divisional of U.S. patent application Ser. No. 08/547,870 filed on Oct. 25, 1995, (now U.S. Pat. No. 5,635,830), which in turn is a divisional of U.S. patent application Ser. No. 08/214,462 filed on Mar. 18, 1994, now U.S. Pat. No. 5,485,079 issued on Jan. 16, 1996. Both U.S. patent application Ser. No. 08/547,870 and U.S. patent application Ser. No. 08/214,462 are incorporated entirely herein by reference.
US Referenced Citations (9)
Foreign Referenced Citations (3)
Number |
Date |
Country |
86387 |
Aug 1983 |
EPX |
345759 |
Dec 1989 |
EPX |
510621 |
Oct 1992 |
EPX |
Non-Patent Literature Citations (1)
Entry |
Itoh et al., "Optical Magnetic Field Sensors With High Linearity Using Bi-Substituted Rare Earth Iron Garnets," The IEEE International Magnetics Conference, 1995 Digest of Intermag '95. Apr. 18-21, 1995, San Antonio, Texas. |
Divisions (2)
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Number |
Date |
Country |
Parent |
547870 |
Oct 1995 |
|
Parent |
214462 |
Mar 1994 |
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