Kabushiki Kaisha Toshiba

Tokyo Shibaura Denki Kabushiki Kaisha

Junichi Akiyama

Hitoshi Iwasaki

Tadashi Kai

Masayuki Takagishi

Akira Kikitsu

Tomomi Funayama

Kenichiro Yamada

Mariko Shimizu

Masahiro Takashita

Yuichi Ohsawa

Hiroaki Yoda

Reiko Kondoh

Toshihiko Nagase

Tomoyuki Maeda

Shuichi Murakami

Toshihiko Ohta

Katsutaro Ichihara

Yoichiro Tanaka

Kohichi Tateyama

Susumu Hashimoto

Kazuhiro Saito

Hiroaki Nakamura

Shiho Nakamura

Yuzo Kamiguchi

Tsuyoshi Kondo

Hirofumi Morise

Hiromi Fuke

Takahiro Hirai

Takashi Hikosaka

Akihiro Koga

Tetsuo Inoue

Shinya Aoki

Shinji Takakura

Kohichi Kubo

Norikazu Sawazaki

Shu Chiba

Yoshiaki Saito

Masashi Sahashi

Tsutomu Tanaka

Koichi Kubo

Junichi Ito

Akihiko Takeo

Koichiro Inomata

Tatsuo Saishu

Yuzo Hirayama

Genichi Hatakoshi

Yoshinori Honguh

Akiko Hirao

Hisanori Aikawa

Kazuki Matsumoto

Yuji Kubota

Norio Nakamura

Kazushi Tanimoto

Naru Ikeda

Yasuo Ohtsubo

Kuniyoshi Tanaka

Nobuyasu Goto

Yusuke Ohinata

Shigeru Yatabe

Keiko Higashi

Toshihiko Ohto

A magnetic memory includes a first magnetic line, an electrode, a write-in portion, a second magnetic line, and a spin-wave generator. The first magnetic line has a plurality of magnetic domains and domain walls, the domain wall separating the magnetic domain. The electrode is provided to both ends of the first magnetic line. The write-in portion is provided adjacent to the first magnetic line. The second magnetic line is provided so that the second magnetic line intersects with the first magnetic line. The spin-wave generator provided to one end of the second magnetic line. The spin-wave detector provided to the other end of the second magnetic line.

Magnetic memory and manufacturing method thereof

A magnetic memory element includes a first magnetic layer, a second magnetic layer, a first intermediate layer, a first magnetic wire, a first input unit, and a first detection unit. The first magnetic layer has magnetization fixed. The second magnetic layer has magnetization which is variable. The first intermediate layer is between the first magnetic layer and the second magnetic layer. The first magnetic wire extends in a first direction perpendicular to a direction connecting from the first magnetic layer to the second magnetic layer and is adjacent to the second magnetic layer. In addition, write-in is performed by propagating a first spin wave through the first magnetic wire and by passing a first current from the first magnetic layer toward the second magnetic layer. Read-out is performed by passing a second current from the first magnetic layer toward the second magnetic layer.

Magnetic memory element and magnetic memory apparatus

An example magnetic head includes a recording pole to generate a recording magnetic field, a spin torque oscillator formed in the vicinity of the recording magnetic pole and a hard bias film provided at both end portions of a bias layer and an oscillation layer of spin torque oscillator. The hard bias film is configured to apply a magnetic field to the bias layer and the oscillation layer.

Magnetic head with spin torque oscillator and magnetic recording head

An example magnetic writing head includes a main magnetic pole, a coil to generate an ampere magnetic field to magnetize the main magnetic pole to cause the magnetized main magnetic pole to generate a magnetic field, and a laminated body. The laminated body includes a first magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole and a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole.

Magnetic recording head and magnetic recording apparatus

An example magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes is operable to pass a current through the laminated body.

It is made possible to provide a magnetic head that generates a sufficient high-frequency magnetic field for assisting recording operations, and a magnetic recording device that includes the magnetic head. A magnetic head includes: a recording magnetic pole; a return yoke magnetically coupled to the recording magnetic pole; and at least two spin torque oscillators provided near the recording magnetic pole.

Magnetic head with spin oscillation device(s) and magnetic recording device

A magnetic device includes a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, a third magnetic layer including a ferromagnetic material with a fixed magnetization direction, and a pair of electrodes. The pair of electrodes are operable to pass a current through a laminated body including the first and second magnetic layers, the nonmagnetic layer, and the third magnetic layer.

Magnetic recording head

A magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes are operable to pass a current through the laminated body.

A magnetic recording head includes a recording magnetic pole, and a spin oscillation device including a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, and a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer. The first magnetic layer and the second magnetic layer are antiferromagnetically coupled and/or magnetostatically coupled to each other. The first magnetic layer and the second magnetic layer are laminated in a direction generally parallel to a medium facing surface and generally parallel to a side surface of the recording magnetic pole intersecting with the medium facing surface.

Magnetic recording head with spin oscillation device and magnetic recording apparatus including the magnetic recording head

It is made possible to provide a magnetic head that can stabilize the high-frequency magnetic field generated from the spin torque oscillator. A magnetic head includes: first and second main magnetic poles; and a spin torque oscillator provided between the first and second main magnetic poles.

Magnetic recording head and magnetic recording device

A magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes operable to pass a current through the laminated body. The laminated body includes a first magnetic layer, a second magnetic layer, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. A lamination direction of the laminated body is substantially parallel to a medium moving direction. In a first direction parallel to an air bearing surface and perpendicular to the lamination direction, the laminated body has a protruding portion that protrudes beyond an end of a surface of the main magnetic pole facing the laminated body.

Magnetic recording head with protruding spin torque oscillator

An information recording/reproducing device according to an example of the present invention includes a first head and a second head each having a conductive region formed of a conductive material, a recording medium having a data area from which data is read by the first head, and a servo burst area from which a servo burst signal is read by the second head, a driver for positioning the first head and the recording medium based on the servo burst signal, and a resistance element for covering a surface of the conductive region of the second head.

Information recording/reproducing device having head covering by resistance element

An information recording/reproducing device according to an example of the present invention includes first and second heads, a recording medium having a data area from which recording data is read by the first head and a servo burst area from which a servo burst signal is read by the second head, a driver which performs positioning of the second head based on the servo burst signal, and a resistor which covers a surface of the servo burst area and does not cover a surface of the data area. The recording data and the servo burst signal are recorded by a pulse signal.

Information recording/reproducing device

A magnetic writing head includes: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes are operable to pass a current through the laminated body.

Growing community of inventors

Kanagawa-ken, Japan

Junichi Akiyama