Magnetic film and magnetic field sensor head
AssigneesCitizen Finedevice Co., Ltd., Citizen Watch Co., Ltd., Shinshu University
InventorsSatoshi Sue, Mitsunori Miyamoto, Toshiya Kubo, Tetsuya Aiba, Toshiroh Sato, Makoto Sonehara
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Abstract
A magnetic sensor head includes an optical fiber, a GI fiber having one end optically connected to the optical fiber, a magnetic film joined to the other end of the GI fiber, and a reflective film joined to a surface of the magnetic film opposite a surface joined to the GI fiber. The magnetic film is formed of a rare-earth iron garnet film. The slope of the sum of squared differences of the rare-earth iron garnet film with respect to an applied magnetic field is 100 or greater.
Claims4
A magnetic sensor head comprising:
- an optical fiber;
- a GI fiber having one end optically connected to the optical fiber;
- a magnetic film joined to the other end of the GI fiber;
- and
- a reflective film joined to a surface of the magnetic film opposite a surface joined to the GI fiber, wherein
- the magnetic film is formed of a rare-earth iron garnet film, and
- a slope of a sum of squared differences of the rare-earth iron garnet film with respect to an applied magnetic field is 100 or greater.
A magnetic film used for a magnetic sensor head including an optical fiber, a GI fiber having one end optically connected to the optical fiber, and a reflective film, the magnetic film comprising:
- one surface joined to the GI fiber;
- and
- the other surface joined to the reflective film, wherein
- the magnetic film is formed of a rare-earth iron garnet film, and
- a slope of a sum of squared differences of the rare-earth iron garnet film with respect to an applied magnetic field is 100 or greater.
Dependencies are inferred from the claim text.