The University of Tokyo

Dowa Electronics Materials Co., Ltd.

Fujifilm Corporation

Osaka University

Kenta Imoto

Shin-ichi Ohkoshi

Asuka Namai

Kenji Masada

Hiroko Tokoro

Masashi Shirata

Kenji Naoi

Marie Yoshikiyo

Makoto Nakajima

Koji Nakabayashi

Kosuke Nakagawa

Shizuka Anan

Provided is a recording device. The recording device includes: an external magnetic field application unit that is configured to apply an external magnetic field to a magnetic recording medium; a light irradiation unit that is configured to irradiate light; and a light focusing unit that is configured to focus the light from the light irradiation unit by resonating the light to generate an enhanced magnetic field in which a magnetic field of the light is enhanced, in which magnetization of the magnetic recording medium is inverted by applying the external magnetic field and the enhanced magnetic field to the magnetic recording medium.

Recording device and recording method

There is provided an oriented body containing platinum group-substituted-6 iron oxide particles typified by Rh-substituted &#x3b5;-iron oxide or Ru-substituted &#x3b5;-iron oxide applicable to MAMR, MIMR, or F-MIMR system, and a technique related thereto, containing platinum group element-substituted &#x3b5;-iron oxide particles in which a part of &#x3b5;-iron oxide is substituted with at least one element of platinum group elements, as magnetic particles wherein the degree of orientation of the magnetic particles defined by the degree of orientation=SQ (direction of magnetization easy-axes)/SQ (direction of magnetization hard-axes) exceeds 5.0, and a coercive force exceeds 31 kOe.

Oriented body, method for producing the same, device for producing the same, and magnetic recording medium

There are provided an oriented body such as a magnetic sheet in which a value of degree of orientation of magnetic particles is beyond 3.5, and a method for producing the same, and a device for producing the same, wherein the oriented body such as a magnetic sheet is produced through the steps of: mixing a mixed solution containing a solvent and a vehicle and &#x3b5;-iron oxide particles by shaking stirring, and dispersing the &#x3b5;-iron oxide particles in the mixed solution; providing a mixed solution in which the &#x3b5;-iron oxide particles are dispersed, on a predetermined substrate; and removing the solvent while applying a magnetic field to the substrate provided with the mixed solution, to obtain an oriented body.

Oriented body containing  e-iron oxide, method for producing the same, and device for producing the same

Growing community of inventors

Tokyo, Japan

Kenta Imoto