Abstract: Siloxane organic hybrid polymers and a method of making them by condensation polymerization reaction of organoalkoxysilane with an alkali metal carboxylic acid catalyst in the presence of organic film-forming polymers are disclosed.

Abstract: 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 temperature in comparison with the first magnetic layer and exchange coupled with the first magnetic layer, wherein the second magnetic layer exhibits in-plane magnetic anisotropy and vertical magnetic anisotropy at room temperature and the vertical magnetic anisotropy relative to the in-plane magnetic anisotropy becomes larger in the vicinity of the Curie temperature of the first magnetic layer than at room temperature.Further, a recording method using the magneto-optical recording medium is also disclosed.

Abstract: Carbon-based polymer substrates such as polyesters are antireflected by applying to the substrates one or more discontinuous layers of inorganic metal compounds having an index of refraction greater than that of the substrates.

Abstract: Non-magnetic ferrite composition used in the composite multilayer part of the invention is based on ferrite containing Fe.sub.2 O.sub.3 and CuO and/or ZnO and further contains 1 to 30% by weight of four oxide components of MgO, BaO, SiO.sub.2, and B.sub.2 O.sub.3 or five or six oxide components including the four oxide components plus at least one of SnO.sub.2 and CaO. Since the use of this non-magnetic ferrite minimizes the difference in coefficient of linear expansion between different materials used, the non-magnetic ferrite, when applied to composite multilayer parts such as shielded multilayer chip inductors, shielded multilayer transformers, and multilayer LC composite parts, prevents occurrence of cracks in the interior and avoids a lowering of circuit resistance due to precipitation of CuO, ZnO or the like at the interface between different materials. There result composite multilayer parts with improved characteristics.

Abstract: A magnetic recording medium suitable for high density recording is prepared by depositing a silicon nitride interlayer onto a carbon substrate and then sputter depositing a barium hexaferrite magnetic recording layer onto the silicon nitride interlayer.

Abstract: 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 Hc.sub.2 than that of the first magnetic layer, wherein the following relationship is satisfied at an operation temperature:Hw.sub.1 -Hexc.sub.1 >Hc.sub.2 -Hexc.sub.2where Hw.sub.1 represents the magnetic domain wall coercivity of the first magnetic layer, Hexc.sub.1 represents the magnitude of the exchange magnetic field exerted on the first magnetic field and Hexc.sub.2 represents the magnitude of the exchange magnetic field exerted on the second magnetic layer is used, to obtain a magneto-optical recording medium with no increase in the noises by overwriting, and without reduction of C/N ratio after repeating recording for a number of cycles, a recording method and overwriting method using the media and a magneto-optical recording device.

Abstract: A discontinuous flash chrome interlayer of about 5 to 25 .ANG. is incorporated between the upper and lower magnetic recording alloy layers. This flash non-magnetic separation layer is so thin that it is, in fact, a discontinuous layer, so that while the benefits of having some chrome flashed on the surface of the first portion of the magnetic recording alloy are achieved, yet the upper and lower magnetic recording alloy layers are not completely physically separated as they are in disks made according to known sputtering processes.

Abstract: 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 magnetic recording medium consisting of a first layer having a perpendicular magnetic anisotropy acting as a recording layer, and a second layer having a perpendicular magnetic anisotropy acting as a reference layer; moving the medium; applying an initial field so that, before recording, the direction of magnetization of the recording layer is left unchanged, and that of the reference layer is aligned either upward or downward; radiating a laser beam onto the medium; pulse modulating an intensity of the laser beam in accordance with binary data to be recorded; when the laser beam is radiated, applying a bias field to the irradiated portion; and when the intensity of the pulse-modulated laser beam is at high level, forming one of the bit having upward-magnetizatio

Abstract: A polyester laminated film with excellent sealing ability is provided. The polyester laminated film comprises a base film of a polyester resin and a sealing film of a polyester composition, said sealing film being disposed on at least one side of said base film, wherein the sealing energy, which is measured when two pieces of said laminated films are joined together with the respective sealing films facing each other, is 300 g.cm/15 mm or more.

Abstract: A magneto-optical recording medium allowing both direct overwriting by light power modulation and superresolutive reproduction, and a recording/reproduction method therefor are provided. The magneto-optical recording medium includes six magnetic layers of which adjacent layers are coupled by an exchange force thereof, the first magnetic layer being made of a rare earth-transition metal alloy or a ferromagnetic material containing a magnetic transition metal, the second to sixth magnetic layers being each composed of a rare earth-transition metal alloy. Each of the magnetic layers has a predetermined Curie temperature, and the respective transition metal sub-lattice magnetization directions of the first to third magnetic layers (including the magnetization direction of the first layer) are aligned in one direction at room temperature while at the same time those of the fourth to sixth magnetic layers are aligned in one direction at room temperature.

Abstract: Disclosed herein are magnetic composite iron oxide particles comprising spinel-type Fe.sub.3 O.sub.4 particles as core particles and spinel-type CoFe.sub.2 O.sub.4 outerlayer of the composite iron oxide particles, a process for producing the same, and a magnetic recording medium comprising a substrate and a magnetic recording layer containing the said magnetic iron oxide particles.

Abstract: Disclosed is a ferromagnetic film consisting of an alloy represented by the formula (Co.sub.x Fe.sub.y T.sub.z).sub.a N.sub.b (wherein T represents at least one type of an atom selected from the group consisting of Al, B, Si, Ga, and Ge, x, y, and z represent at % and satisfy 66<x<94, 5<y.ltoreq.24, 1<z<10, and x+y+z=100, and a and b represent at % and satisfy 85<a<99, 1<b<15, and a+b=100), being crystalline, and having a crystal structure at least partially consisting of an fcc phase.

Abstract: A magnetooptic medium which includes a substrate, an amorphous seed layer of ZnSnO, and a recording multilayer layer. The recording multilayer includes alternating layers of cobalt/platinum or cobalt/palladium or mixtures thereof.

Abstract: A magneto-optical recording medium in which n layers (n is an odd number equal to or more than 5) of magnetic thin film are exchange-coupled to be laminated on a substrate, and assuming that the n layers of magnetic thin film are the first magnetic layer, the second magnetic layer, . . . the n-th magnetic layer in sequence, and the Curie temperature on the i-th magnetic layer is Tc.sub.i, the following conditions are satisfied (where Tc.sub.n+1 is an ambient temperature and m is an arbitrary natural number equal to or less than (n-1)/2).(1) Tc.sub.2m+1 .gtoreq.Tc.sub.2m, Tc.sub.1 .gtoreq.Tc.sub.2m(2) Tc.sub.2m .gtoreq.Tc.sub.2(m+1)(3) In a cooling process after heating the medium to a temperature of Tc.sub.2 or more, when the temperature of the (2m)-th magnetic layer drops down to a temperature near Tc.sub.

Abstract: A dielectric ceramic composition for low temperature sintering according to the invention is a composition which is a solid solution having two components of Pb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 --PbTiO.sub.3 and at least one additive component of Pb(Zn.sub.1/2 W.sub.1/2)O.sub.3 and Pb(Cu.sub.1/3 Nb.sub.2/3)O.sub.3, and the mol percents of the components fall within the following ranges: Pb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 75.0-85.0; PbTiO.sub.3 0-15.0; at least one of Pb(Zn.sub.1/2 W.sub.1/2)O.sub.3 and Pb(Cu.sub.1/3 Nb.sub.2/3)O.sub.3 5.0-16.5. Further, at least one of oxides of Mn, Mg, and Ca below 0.5 mol percent may be added to the above composite.

Abstract: A magnetooptic medium which includes a substrate, a crystalline seed layer of ZnO, and a recording multilayer layer. The seed layer is ZnO, and the recording multilayer includes alternating layers of cobalt/platinum or cobalt/palladium or mixtures thereof.

Abstract: Siloxane organic hybrid polymers and a method of making them by condensation polymerization reaction of organoalkoxysilane in the presence of organic film-forming polymers are disclosed.

Abstract: A magneto-optical recording medium comprises a base film having a certain crystal plane oriented in parallel to a substrate and a recording film formed on the base film. The recording film is composed of plural pairs of Mn alloy group magnetic thin film layer having a C-axis-oriented crystalline magnetic anisotropy and a nonmagnetic thin film layer having an interatomic spacing approximate to that of the base film, alternately laminated each other, so that the Mn alloy group magnetic film having a C-axis-oriented crystalline magnetic anisotropy is epitaxially grown on the substrate at a low temperature through the base film with high thermal stability and great magneto-optical effect.

Abstract: A medium includes a readout layer, a memory layer, an adjusting layer for an exchange coupling force .sigma..sub.W, and a writing layer, and can perform an over-write operation upon radiation of a modulated laser beam. The readout layer essentially consists of GdFeCo, the memory layer essentially consists of TbFeCo, the adjusting layer essentially consists of GdFeCo, and the writing layer essentially consists of DyFeCo. The C/N ratio of the medium exceeds 53 dB. The C/N ratio is a value obtained when a plurality of mark.sup.H having a period of 1.6 .mu.m are written, and are read out so that medium noise is maximized as compared to other noise components.

Abstract: One aspect of the present invention relates to enabling rotational flux conduction through magnetic film devices by creating a magnetic film layer with anisotropy perpendicular to the plane of the film layer, the film deposited in sufficient thickness so that there is a rest state rotational conduction path in the plane of the film layer. Another aspect of the invention is to provide for flux spreading in a magnetic device having perpendicular anisotropy. One feature of the present invention enables forming perpendicularly oriented central domains in a magnetic device so that the path for conduction of signal flux by rotation remains open even for very narrow signal flux paths. Another feature of the invention is to orient at rest domain states of a magnetic device pole (or poles) perpendicular to two desired in-plane rotational flux travel directions.