Murata Manufacturing Co., Ltd.

Murata Mfg. Co., Ltd.

Takenori Sekijima

Takashi Fujii

Kikuo Wakino

Masakatsu Okada

Hiroshi Takagi

Masaru Fujino

Mikio Geho

Osamu Chikagawa

Makoto Kumatoriya

Satoru Shinmura

Shinobu Mizuno

Shinichiro Chiku

A magnetic structural body contains core-shell structure particles each including a core section and a shell section covering the surface of the core section. The core section is made of an alloy containing a first metal and a second metal. The shell section is made of an alloy which contains the first metal and the second metal and which has a first metal-to-second metal content ratio different from that of the core section. The first metal is a magnetic metal and has a standard redox potential higher than that of the second metal. The neighboring core-shell structure particles are linearly linked to each other.

Magnetic structural body

A terbium type paramagnetic garnet single crystal having a high Faraday effect and a high light transmission factor even in a visible range, as well as a high Verdet constant. A magneto-optical device containing the terbium type paramagnetic garnet single crystal. The terbium type paramagnetic garnet single crystal contains at least terbium, at least one element of aluminum and gallium, and a part of the terbium is replaced by at least one element of cerium and praseodymium.

Terbium type paramagnetic garnet single crystal and magneto-optical device

A photo magnetic field sensor includes a Faraday rotator made of a paramagnetic material, a polarizer, an analyzer, a light-irradiating element, and a light-sensing element. The Faraday rotator is made of a paramagnetic garnet single crystal including at least Tb and Al.

Photomagnetic field sensor

A single crystal producing method for growing a single crystal, comprises the steps of: placing a material at one focal point in a light-condensing and heating furnace having an ellipse in section; placing a heat light source at another focal point; and emitting a laser beam has a wavelength of not less than about 160 nm and not greater than about 1,000 nm, on or near the one focal point to form a melt zone; and moving the melt zone to grow a single crystal.

Single crystal producing method and apparatus

A method for growing a single crystal by allowing a seed crystal to contact a molten zone formed by melting a polycrystalline material, followed by moving the molten zone away from the seed, wherein the oxygen concentration in the atmosphere during growth of the single crystal is lower than about 10% by volume.

Method for growing single crystal

The present invention provides a cerium-containing magnetic garnet single crystal having a size large enough to use as a material for optical communication of an isolator and for an electronic device, and a production method therefor. The cerium-containing magnetic garnet single crystal of the present invention is obtained by melting a cerium-containing magnetic garnet polycrystal while applying a sharp, large temperature gradient to the solid-liquid interface of the melt and the solid, and then solidifying the melted polycrystal. The polycrystal is preferably heated by using an optical heating device, for example, a combination of a main heating device using a laser beam, and an auxiliary heating device using reflected light from a halogen lamp.

Cerium-containing magnetic garnet single crystal and production method

There is provided a single crystal growth method which allows single crystal of an incongruent melting compound to be grown stable while controlling its growth orientation. The single crystal growth method comprises the steps of: holding polycrystal and seed crystal within a heating furnace; joining the polycrystal with the seed crystal; heating the polycrystal on the side opposite from the side where the polycrystal is joined with the seed crystal to form a melt zone; moving the melt zone to the side where the polycrystal is joined with the seed crystal so that the melt zone is in contact with the seed crystal to allow seeding; and growing single crystal by moving the melt zone which has been in contact with the seed crystal and been seeded to the opposite side from the side where the polycrystal is joined with the seed crystal.

Single crystal growth method

Method of producing a cerium-containing magnetic garnet single crystal

A magnetostatic wave device has an external magnetic field applied in a direction that is substantially parallel to a plane of a thin film of a magnetic single-crystal having a garnet structure. The thin film of the magnetic single-crystal has an axis of easy magnetization that is oriented in substantially the same direction as the direction of the externally applied magnetic field.

Magnetostatic wave device with a magnetic field applied parallel to an

A surface magnetostatic wave device includes an Fe-containing garnet single crystal film grown on a gadolinium gallium garnet substrate. The crystallographic plane azimuth of the gadolinium gallium garnet substrate can be one of a (110) plane, a (100) plane, and a (211) plane. The device achieves both a reduced saturation magnetization and a reduced anisotropic magnetic field to thereby minimize the lowest frequency in the propagation band.

Surface magnetostatic wave device

A material for magnetostatic wave devices comprises a thin single-crystalline magnetic film consisting essentially of a magnetic garnet containing iron, and at least one element of zirconium and hafnium incorporated therein. The content of zirconium and/or hafnium is less than or equal to 1000 wt.ppm.

Growing community of inventors

Shiga-Ken, Japan

Takenori Sekijima