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| Number | Title | Issue Date |
| 7153540 | Recording layer of magneto-optical storage medium having sublayer and method of fabricating the same A recording layer of a magneto-optical storage medium having a sublayer in accordance with the present invention comprises a recording layer on which information is recorded and stored; and a sublayer formed above or below the recording layer and made up of an alloy... | 12/26/2006 |
| 7054082 | Magnetic transfer method for a high-density magnetic recording medium An accurate magnetic transfer to a high-density slave medium having two magnetic layers and utilizing antiferromagnetic coupling is performed. By applying a first magnetic field that causes both the first and second magnetic layers of the magnetic layer of a slave m... | 05/30/2006 |
| 7035138 | Magnetic random access memory having perpendicular magnetic films switched by magnetic fields from a plurality of directions A magnetization reversal method is a method of applying an external magnetic field to a magnetoresistive film, in which the magnetoresistive film has a structure wherein a nonmagnetic film is placed between magnetic films with an easy axis of magnetization along a p... | 04/25/2006 |
| 6844083 | Magneto-optical recording medium possessing a magnetic assist layer A magneto-optical recording medium has a configuration such that information recorded can be read from a region smaller than a beam spot by applying an external magnetic field and directing a light beam in reproducing. The magneto-optical recording medium includes a... | 01/18/2005 |
| 6802073 | Magneto-optical recording medium Disclosed are magneto-optical recording media including at least a reflection layer, a recording layer and a dielectric layer laminated on a substrate in this order, wherein the thickness of the dielectric layer is not less than 140 nm or wherein the dielectric laye... | 10/05/2004 |
| 6377414 | Magnetic media patterning utilizing heat-induced phase transition Patterned magnetic media are provided at high resolution and pattern definition by a process comprising steps of: applying to a magnetic layer a first uniform magnetic field of a first direction and strength to pre-align the magnetic grains thereof; apply... | 04/23/2002 |
| 6178143 | Magneto-optical recording medium for achieving super resolution reproduction of high resolution recorded information A magneto-optical recording medium has a recording layer made of a perpendicular magnetization film, and a readout layer which is in an in-plane magnetization state at room temperature and changes into a perpendicular magnetization state with a rise in te... | 01/23/2001 |
| 6120921 | Magneto-optical recording medium The magneto-optical recording medium of the present invention has a triple-layer magnetic laminate on the surface side of the substrate, and the magnetic laminate comprises an amplification layer A1, an exchange coupling control layer C12 | 09/19/2000 |
| 6103407 | Magneto-optical recording medium and method of using same A magneto-optical recording medium which is adapted to realize a partial ROM with remarkable facility in providing software. The magneto-optical recording medium comprises a transparent substrate, a volatile magnetic recording layer formed on the transpar... | 08/15/2000 |
| 6030716 | Magneto-optical recording medium and method of reproducing information recorded on such medium A magneto-optical recording medium adapted for reproduction of a high resolution signal without the necessity of a reproducing magnetic field. The magneto-optical recording medium comprises a transparent substrate and deposits of a reproducing layer, a sw... | 02/29/2000 |
| 6028824 | Magnetooptical recording medium allowing overwriting with two or more magnetic layers A magnetooptical recording medium provided with a first magnetic layer and a second magnetic layer having a higher Curie point and a lower coercive force than the first magnetic layer and being exchange coupled with the first magnetic layer satisfies the ... | 02/22/2000 |
| 5903525 | Coil for use with magneto-optical head A planar micro-coil is provided for use with an optical head. The optical head is preferably a flying magneto-optical head. The micro-coil cooperates with a yoke assembly so to as to permit an optimal magnetic flux density to be formed at a surface of a m... | 05/11/1999 |
| 5871855 | Magneto-optical recording medium and method of using same A magneto-optical recording medium which is adapted to realize a partial ROM with remarkable facility in providing software. The magneto-optical recording medium comprises a transparent substrate, a volatile magnetic recording layer formed on the transpar... | 02/16/1999 |
| 5843570 | Magneto-optical recording medium having large kerr rotational angle in short wavelength range In a magneto-optical recording medium, a protective layer 14, a first magnetic layer 11 formed of a light rare earth element-heavy rare earth element-transition metal alloy, a second magnetic layer 12 formed of a light rare earth element-heavy rare earth ... | 12/01/1998 |
| 5774429 | Magneto-optical recording medium, and information recording/reproduction method using the medium A magneto-optical recording medium includes a substrate on which light is incident, a first magnetic layer provided at the substrate side, and a second magnetic layer provided on the first magnetic layer. The first magnetic layer is an in-plane magnetizat... | 06/30/1998 |
| 5764600 | Overwritable, high-density magneto-optical recording medium and recording/reproduction method therefor A recording/reproduction method for recording or reproducing information using the magneto-optical recording medium, the magneto-optical recording medium comprising a first magnetic layer comprising a rare earth-transition metal alloy or a ferromagnetic m... | 06/09/1998 |
| 5706259 | Magneto-optical recording medium for magnetically induced super resolution In a magneto-optical recording medium for super resolution reproduction, a recording layer having a Curie temperature of 300° C. or higher is used. An inhibition force for inhibiting movement of a domain wall in the recording layer is enhanced, while the... | 01/06/1998 |
| 5683803 | Magneto-optical recording medium and method of recording and reproducing using the same A magneto-optical recording medium includes a first magnetic layer and a second magnetic layer being laminated. When information is to be recorded on the first magnetic layer, first, a magnetization direction in the second magnetic layer is arranged in on... | 11/04/1997 |
| 5671206 | Optical pickup device An optical pickup device for recording/reproducing an optical disc having at least two data storing layers on one side thereof generates a first and second laser beams of same polarization (S-polarized beams) from a first and second laser beam sources. Th... | 09/23/1997 |
| 5663935 | Magneto-optical recording medium having two magnetic layers of exchange-coupled at ferromagnetic phase Binary recording is carried out with an optical recording medium having at least a recording layer, and an auxiliary layer which is in an antiferromagnetic phase at room temperature and which exhibits temperature hysteresis such that it changes upon eleva... | 09/02/1997 |
| 5657299 | Magneto-optical recording medium A magneto-optical recording medium has magnetic multi-layers including a reproductive layer, which is a magnetic layer having perpendicular magnetic anisotropy, for reading out magneto-optically recorded information and a recording layer, which is a magne... | 08/12/1997 |
| 5645911 | Over-writable method of magnetooptical recording An over-writable method of magnetooptical recording using a magnetooptical recording medium provides a high C/N ratio in a reproduction mode, permits reduction of the intensity of the initial magnetic field at room temperature in a recording mode, and per... | 07/08/1997 |
| 5639567 | Exchange-coupled direct overwrite magneto-optic recording media A magneto-optic recording medium for use with a recording system including a laser beam operable at at least two different energy levels and magnetic field source(s) for generating two different magnetic fields. The medium includes a substrate and at leas... | 06/17/1997 |
| 5637394 | Magneto-optical recording medium and method of reproducing magneto-optical information using thereof A magneto-optical recording medium comprising a readout layer and a recording layer has a relationship that an external magnetic field H1 is smaller than an external magnetic field H4, where the H1 is a minimum external magnetic field necessary to make a ... | 06/10/1997 |
| 5596555 | Magnetooptical recording medium having magnetic layers that satisfy predetermined coercive force relationships, and recording/reproduction method for the medium A magnetooptical recording medium has first and second magnetic layers laminated in that order on a transparent substrate on which a received laser beam is incident. The coercive force of the second magnetic layer is greater than that of the first magneti... | 01/21/1997 |
| 5593790 | Interference super-resolution using two magnetic layer construction A magneto-optic recording medium having two magneto-optic layers exchange-coupled to each other. The Curie temperature, TC1, of the first layer is less than that of the second layer, TC2. The magneto-optic effect is large for tempera... | 01/14/1997 |
| 5585200 | Over write capable magnetooptical recording medium An overwritable method of magnetooptical recording uses an over write capable magnetooptical recording medium that comprises a substrate and a magnetic layer. The magnetic layer is stacked on the substrate and includes first and second layers each having ... | 12/17/1996 |
| 5574703 | Magneto-optical method and apparatus for recording/reproducing data To directly overwrite data on a magnito-optical recording medium formed of two exchange-coupled magnetic layers of a memory layer with a high coercive force and a low Curie point and a reference layer with a low coercive force and a high Curie point, an i... | 11/12/1996 |
| 5508982 | Method for recording on a magneto-optic storage medium having two recording layers A method for recording on a magneto-optic recording medium having two magneto-optic recording layers having different Curie temperatures. The magneto-optic layers must be capable of existing in two different magnetic states: a first magnetic state in whic... | 04/16/1996 |
| 5503924 | Exchange-coupled magnetooptical recording medium with first layer having smaller vertical orientation saturation magnetization than in-plane orientation saturation magnetization of second layer An overwritable magneto-optical recording medium is disclosed. The recording medium comprises a first magnetic layer exhibiting vertical magnetic anisotropy and a second magnetic layer having a higher Curie temperature and a lower coercive force at room t... | 04/02/1996 |
| 5487046 | Magneto-optical recording medium having two magnetic layers with the same curie temperature A magneto-optical recording method for recording information in an overwrite mode in a magneto-optical recording medium by the application of a laser beam is disclosed. The magneto-optical recording medium includes a substrate, and at least two magnetic r... | 01/23/1996 |
| 5486395 | Magneto-optical disk A magneto optical disk comprising: a circular substrate; a recording layer, formed on the substrate, for magneto-optical recording of information; a readout layer, formed between the substrate and the recording layer, for the reproduction of information r... | 01/23/1996 |
| 5462811 | Magneto-optical recording media and mangeto-optical device using the media A magneto-optical recording medium comprising, on a substrate, at least a first magnetic layer made of a rare earth amorphous alloy and a second magnetic layer made of a rare earth amorphous alloy having a relatively smaller coercivity Hc2 than... | 10/31/1995 |
| 5458987 | Multilayered magnetooptical recording medium A magnetooptical recording method for recording data using a bit having upward-magnetization and a bit having downward-magnetization on a recording layer of a magnetooptical recording medium comprises the steps of using, as the medium, a multilayered magn... | 10/17/1995 |
| 5420833 | Magneto-optical recording medium having first and second magnetic layers A magneto-optical recording medium is composed of a first magnetic layer and a second magnetic layer, which are overlaid, each having a perpendicular magnetic anisotropy, and the first magnetic layer having a Curie temperature of Tc1, a saturat... | 05/30/1995 |
| 5414678 | Magneto-optic recording medium having two recording layers, and drive for same A magneto-optic recording medium having two magneto-optic recording layers having different Curie temperatures. The magneto-optic layers must be capable of existing in two different magnetic states: a first magnetic state in which both magneto-optic layer... | 05/09/1995 |
| 5367507 | Over write capable magnetooptical recording method, and magnetooptical recording apparatus and medium used therefor A magnetooptical recording method for recording data using a bit having upward-magnetization and a bit having downward-magnetization on a recording layer of a magnetooptical recording medium comprises the steps of using, as the medium, a multilayered magn... | 11/22/1994 |
| 5355354 | Non-overwritable magnetooptical recording apparatus using exchange-coupled two-layered medium with interface magnetic wall A non-overwritable recording apparatus comprises a magnetooptical recording media including at least first and second exchange-coupled layers having perpendicular magnetic anisotrophy, the Curie temperature of the second layer being higher than that of th... | 10/11/1994 |
| 5353266 | Magnetooptical recording method Magnetooptical recording is effected simultaneously with an overwriting operation. A magnetooptical recording medium to be used in this method is provided with a first magnetic layer having a Curie temperature T1 and a coercive force H1 | 10/04/1994 |
| 5325343 | Magneto-optical recording medium having two RE-TM layers with the same Curie temperature The medium consists of two exchange-coupled RE-TM amorphous layers (a memory layer and a reference layer) whose Curie temperatures are almost the same and only one of which is RE-rich without a compensation temperature, the two layers being laminated dire... | 06/28/1994 |
