公开(公告)号：JPS59180805A

公开(公告)日：1984-10-15

申请号：JP5565283

申请日：1983-03-31

Applicant: Sony Corp

Inventor： TAMADA HITOSHI ,  KANEKO MASAHIKO ,  OKAMOTO TSUTOMU ,  YAMADA TOSHIROU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

CPC classification number: G11B5/02

Abstract: PURPOSE:To stabilize the writing position by setting the recording position by making use of the force acting on a magnetic bubble which is produced by the change of the magnetic energy at the areas of different levels of film thickness. CONSTITUTION:A thin film of YSmGaFeGe garnet is formed on a garnet substrate 1a by an LPE process to obtain a film 1b containing a soft magnetic film surface magnetized vertically and easily. Then square hollow parts 21 are arrayed with a prescribed pitch on the surface of the oxide film 1b by a photolithography process, and therefore a stage part 22 is formed at the edge part of each hollow part 21. An argon ion laser is used as a recording light source and then stopped down to form a 1.0mum spot on the film 1b, and the recording is performed with 5.0mus pulse width. Then the writing pulse light is irradiated within a 1/4 circle centering on the diagonal line passing through a point A of the part 21 for a circle which is drawn with an about 3.2mum radius from the point A within a distance of the 1.2mum radius of a bubble (b), i.e., from adjacent side walls 22a and 22b of the part 21. Thus it is confirmed that the bubble (b) is stably generated at the point A.

Abstract translation: 目的：通过利用由不同程度的膜厚度的区域上的磁能的变化产生的作用在磁性气泡上的力来设定记录位置来稳定书写位置。 构成：通过LPE工艺在石榴石基材1a上形成YSmGaFeGe石榴石薄膜，得到含有垂直且容易磁化的软磁性膜表面的膜1b。 然后通过光刻工艺在氧化膜1b的表面上以规定的间距排列正方形的中空部21，因此在各中空部21的边缘部形成有台部22。将氩离子激光用作 记录光源，然后停止在薄膜1b上形成1.0μm的斑点，并以5.0mus的脉冲宽度进行记录。 然后将写入脉冲光照射在穿过部分21的点A的对角线上的1/4圈内，该圆弧在距离点1.2的距离内从距离A的距离为1.2μm的范围内绘制大约3.2μm半径的圆 气泡（b）的半径，即来自部分21的相邻侧壁22a和22b。因此证实气泡（b）在点A稳定地产生。

公开(公告)号：JPS5525881A

公开(公告)日：1980-02-23

申请号：JP9929278

申请日：1978-08-15

Applicant: SONY CORP

Inventor： HIMURO MASAMI ,  YAMADA TOSHIROU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To improve the S/N ratio of a read-out signal by making use of photomagnetic effect by recording continuously signals on alternate long wavelength and short wavelength signal tracks of a magnetic recording medium. CONSTITUTION:Vertical and easy magnetization film unit 2 for a soft magnetic film comes in contact with magnetic tape 1 moving in the arrow direction. Light emitted by light-source generator 3 is passed through polarizer 4, beam splitter 5 and object lens 6 and then focused on the magnetized film of unit 2, where it is reflected before being supplied to analyzer 7 by way of lens 6 splitter 5. During this, the light is under the influence of Faraday optical action according to the magnetization direction of the domain of the magnetized film. At this time, a long-wavelength magnetic domain generated stabilizes the short-wavelength magnetic domain easily disturbed by the run of tape 1 on the magnetized film, a photo modulated signal whose width has been modulated accoring to the domain width is supplied to photoelectric converting element 8 and from its output terminal 9, an electric signal is outputted and then regenerated by FM regenerator.

公开(公告)号：JPS60257607A

公开(公告)日：1985-12-19

申请号：JP11479384

申请日：1984-06-05

Applicant: SONY CORP

Inventor： MURAKAMI YOSHIKAZU ,  ITOU SEIGO ,  YAMADA TOSHIROU

IPC: H03B9/14 ,  H01P1/215 ,  H01P7/00 ,  H03B1/00 ,  H03B5/18

Abstract: PURPOSE:To incorporate easily a YIG on an MIC substrate and to allow the titled oscillator to withstand vibration by using a magnetic resonance of the uniform mode of the YIG thin film formed with the thin film forming technology so as to constitute the resonator for a turning oscillator. CONSTITUTION:A yoke 1 made of a magnetic substance is provided and a substrate 3 whose oscillating circuit is assembed to the magnetic gap 2 is arranged. A coil 6 is wound at least on magnetic poles 4, 5 opposed to each other and constituting the magnetic gap 2 of the yoke 1 so as to apply a variable current to the coil 6 thereby constituting a variable magnetic field applying means. A grounding conductor 32 of the substrate 3 is adhered to the 1st major plane of a dielectric substrate 31 and a micro strip line 33 is adhered to the other 2nd major plane. The YIG thin film magnetic resonance element 35 is coupled electromagnetically thereto. In addition, a series feedback type oscillator is constituted by a high frequency transistor 37, an impedance matching circuit 38 and a DC block MOS capacitor 39.

公开(公告)号：JPS6038784A

公开(公告)日：1985-02-28

申请号：JP14545883

申请日：1983-08-09

Applicant: SONY CORP

Inventor： TAMADA HITOSHI ,  KANEKO MASAHIKO ,  OKAMOTO TSUTOMU ,  YAMADA TOSHIROU

IPC: G11B5/00 ,  G11B5/09 ,  G11B13/04 ,  G11C13/06

Abstract: PURPOSE:To move stably bit information to a prescribed position by forming an area having a different magnetic energy on a magnetized film with ion implantation or the like and utilizing the force which is accompanied with this energy change and acts upon a magnetic bubble. CONSTITUTION:An area 21 having a different magnetic energy is formed on the magnetized film by ion implantation, a recessed part or the like, and a magnetic bubble (b) of bit information is generated in a left upper corner A or the like of this area 21 along boundaries. When the bubble (b) is moved to a right upper corner B or the like of the area 21 along boundaries by the intra-film temperature distribution due to irradiation of optical pulses, a stabilizing force (c) due to the difference of magnetic energy between the area 21 and an area brought into contact with the area 21 is applied, and the bubble (b) is held stably in the movement position even if the light irradiation position is variant or fluctuated. As the result, bit information is moved to a prescribed position stably.

公开(公告)号：JPS59180804A

公开(公告)日：1984-10-15

申请号：JP5565183

申请日：1983-03-31

Applicant: Sony Corp

Inventor： TAMADA HITOSHI ,  KANEKO MASAHIKO ,  OKAMOTO TSUTOMU ,  YAMADA TOSHIROU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04

CPC classification number: G11B13/045

Abstract: PURPOSE:To perform thermal magneto-optic recording with an especially low level of optical intensity by using a magnetic garnet film containing Bi as a soft magnetized film and specifying the relation between the anisotropic magnetic field and the film thickness of the garnet film. CONSTITUTION:A film 2 containing a soft magnetic film surface magnetized vertically and easily is formed on a GGG substrate 1 by epitaxially growing the magnetic garnet or a garnet film containing Bi with a liquid phase. Thus a recording medium 3 is obtained. Then a magnetic field of (H0+H2)/2 is applied to the film 2 by a bias megnetic field generating means, where H0 and H2 mean the collapse magnetic field and the run-out magnetic field, respectively. In this case, the coordinate points (x, y) are set within the ranges connecting a point A of (0.5, 0), a point B of (o.5, 3,000), a point C of (1.0, 3,000), a point D of (1.5, 1,800), a point E of (3.0, 800), a point F of (6.0, 400) and a point G of (6.0, 0) respectively with a coordinate system of vertical and horizontal axes y and x for the anisotropic magnetic field Hk and the film thickness (h) of the film 2 with which the recording is possible with the

Abstract translation: 目的：通过使用含有Bi作为软磁膜的磁性石榴石膜，并指定各向异性磁场与石榴石膜的膜厚之间的关系，以特别低的光强度进行热磁光记录。 构成：通过外延生长磁性石榴石或含有液相的Bi的石榴石膜，在GGG基板1上形成包含垂直且容易地磁化的软磁性膜表面的膜2。 从而得到记录介质3。 然后，通过偏置电场产生装置将（H0 + H2）/ 2的磁场施加到膜2，其中H0和H2分别表示崩溃磁场和磁场偏移。 在这种情况下，将坐标点（x，y）设定在连接点（A0），（0.5,0），点B为（o.5,3,000），点C为（1.0,3,000）， （1.5,1800）的点D，（3.0,800）的点E，（6.0,400）的点F和（6.0,0）的点G分别具有垂直和水平轴线y的坐标系 和用于各向异性磁场Hk的x和在具有1.0mum的氩激光的脉冲光进行记录的情况下以<= 10mW功率进行记录的膜2的膜厚度（h） 光斑直径和5.0mus脉冲宽度。 因此，可以在Hk和（h）之间指定关系。 这样可以确保通过从衬底1照射的光的低水平的记录功率的精确记录。

公开(公告)号：JPS5525817A

公开(公告)日：1980-02-23

申请号：JP9703578

申请日：1978-08-09

Applicant: SONY CORP

Inventor： HIMURO MASAMI ,  YAMADA TOSHIROU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To erase the maze magnetic domain and then to improve the S/N by supplying the DC bias magnetic field vertically onto the surface of the soft magnetic film vertical easy magnetization film using the photomagnetic effect. CONSTITUTION:Helmholtz coil 10 is installed at the outer circumference of soft magnetic film vertical easy magnetization film device 2 which touches magnetic tape 1 running in the direction of the arrow mark, and the DC bias magnetic field is supplied vertically onto the surface of the magnetized film of device 2. Under these conditions, the beams sent from light source generator 3 are condensed on the magnetized film of divice 2 through polarizer 4, beam splitter 5 and object lens 6 each and then reflected by the reflector film to be supplied to light detector 7 via lens 6 and splitter 5. During this, the beam receives the right or left Faraday optical rotation according to the magnetizing direction of the domain of the magnetized film. As a result, the optical modulation signal received the width modulation according to the domain width is supplied to photoelectric converter 8, and the electric signal obtained at output terminal 9 of element 8 is regenerated through the FM regenerator.

公开(公告)号：JPS60257614A

公开(公告)日：1985-12-19

申请号：JP11479484

申请日：1984-06-05

Applicant: SONY CORP

Inventor： MURAKAMI YOSHIKAZU ,  ITOU SEIGO ,  YAMADA TOSHIROU

IPC: H03J3/04 ,  H01P1/215 ,  H01P1/217 ,  H01P1/218 ,  H01P7/00 ,  H03B5/18 ,  H03J3/16

Abstract: PURPOSE:To eliminate the need for a circuit preventing a tracking error by forming a magnetic resonance element used for a filter circuit and a local oscillating circuit by means of the thin film forming technology respectively as a ferromagnetic thin film element so as to make the resonance characteristic coincident. CONSTITUTION:A grounding conductor 92 is adhered to the back side of a common base made of alumina, and a filter circuit 2, an amplifier circuit 3, a mixing circuit 4 and a local oscillating circuit 5 are formed to the major plane. In the filter circuit 2 and the local oscillation circuit 5, ferromagnetic thin films 28, 55 being the magnetic resonance element are formed on a gadolinium gallium garnet GGG substrate 93 by means of thin film forming technology and arranged so as to be connected electromagnetically with microstrip lines 24, 53 adhered to the major plane. A notch 94 is formed to the base 1 and the microstrip lines 23, 24, 53 and the grounding conductor 92 are connected by connecting conductors 25, 32, 54.

公开(公告)号：JPS59116904A

公开(公告)日：1984-07-06

申请号：JP23243282

申请日：1982-12-23

Applicant: Sony Corp

Inventor： KANEKO MASAHIKO ,  TAMADA HITOSHI ,  OKAMOTO TSUTOMU ,  YAMADA TOSHIROU

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04

CPC classification number: G11B13/045 ,  G11B11/10504 ,  G11B11/10515

Abstract: PURPOSE:To execute recording even in case of using a semiconductor laser of a long wavelength by laminting a metallic film on a vertical magnetized film, and forming a cylindrical magnetic domain by impressing a bias magnetic field and a pulse light to said film. CONSTITUTION:A soft magnetic film surface vertical easy magnetized film 2 is stuck to a crystal substrate 1, and a metallic film 3 is stuck to said film. The metallic film 3 has an absorption factor of 20-80% and a reflection factor of 80-20% with respect to a recording light of a prescribed wavelength, which transmits the magnetized film 2, and it is formed by a metal whose thermal conductivity is equal to that of the magnetized film 2 or below. A bias magnetic field is impressed to the magnetized film 2 in a single magnetic domain and also in a state that the magnetization is in one vertical direction to the film surface. As for a laser light, a part is absorbed by the metallic film 3, a part is reflected and converted to heat, and the magnetized film 2 is heated by this part, and also the relfected light goes into the magnetized film 2 again, the magnetized film 2 is heated efficiently, and an information is recorded as a cylindrical magnetic domain.

Abstract translation: 目的：即使在通过在垂直磁化膜上分层金属膜来使用长波长的半导体激光器的情况下也执行记录，并且通过向所述膜施加偏置磁场和脉冲光来形成圆柱形磁畴。 构成：将软磁性膜表面垂直易磁化膜2粘贴在晶体基板1上，并将金属膜3粘贴到所述膜上。 相对于透过磁化膜2的规定波长的记录光，金属膜3具有20-80％的吸收系数和80-20％的反射系数，并且由金属膜形成的热导率 等于磁化膜2或以下。 偏磁场在单个磁畴中被施加到磁化膜2上，并且在磁化在与膜表面一个垂直方向上的状态下。 对于激光，部分被金属膜3吸收，部分被反射并转换成热，并且被磁化膜2被该部分加热，并且再感光再次进入磁化膜2， 磁化膜2被有效地加热，并且将信息记录为圆柱形磁畴。

公开(公告)号：JPS57175793A

公开(公告)日：1982-10-28

申请号：JP5770081

申请日：1981-04-16

Applicant: SONY CORP

Inventor： YORIZUMI MINEO ,  YAMADA TOSHIROU ,  TAMURA HIDEMASA

IPC: H01F1/34 ,  C30B13/00 ,  C30B13/22 ,  C30B13/24 ,  H01B3/00

Abstract: PURPOSE:To make it possible to prevent the occurrence of the deterioration and cracks of a grown crystal, by annealing a grown single crystal part with an auxiliary heating means in a seed crystal growing apparatus. CONSTITUTION:A seed crystal of a single crystal is mounted on a platinum plate 78 at the tip of a rotating and driving shaft 72, and a raw polycrystalline material 83 is mounted on a rotating and driving shaft 73. The rotating and driving shafts 72 and 73 are set to position a joined part of the seed crystal to the polycrystalline material 83 at a focus (E2) of an infrared heating chamber 2, and the joined part is heated to be a molten state by infrared rays 5 from a lamp 3. The rotating and driving shafts 72 and 73 are lowered slowly while rotated and driven mutually in the opposite directions, and a molten part 84 of a material 4 to be treated is relatively lifted. Thus, a single crystal part 80 is grown under the molten part 84 and then introduced into a heat generating part 14 of the subheater 13 gradually and annealed. The heat generating part 14 is connected to an electrode 58 through an inserting hole 56 provided in a support 55.

公开(公告)号：JPS5668940A

公开(公告)日：1981-06-09

申请号：JP14404879

申请日：1979-11-06

Applicant: SONY CORP

Inventor： YAMADA TOSHIROU

IPC: G11B5/62 ,  G11B5/02 ,  G11B5/64 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To improve the SN ratio when a recorded signal is reproduced by using a vertical easy magnetization film of a soft magnetic film surface by providing guard bands of specific width between the plural signal tracks and by recording a signal of specific wavelength on these guard bands. CONSTITUTION:Between the plural tracks 1b1-1b3,... of a magnetic recording medium such as magnetic tape 1, from which a recording signal is reproduced by using a vertical easy magnetization film of a soft magnetic film surface, guard bands 10 narrower than maze magnetic domain width d0 of said magnetization film are provided. Then, a signal of about 2d0 in wavelength lambdag is so recorded in guard bands 10 that magnetic field Hgb will be smaller than magnetic field Hlu required to generate signal magnetic domains in said magnetization film. Consequently, when the signal is read out by using said magnetization film, the SN ratio can be improved with a few maze magnetic domains without putting signal magnetic domains and maze magnetic domains in a series.