摘要:
A thermoelectric conversion device of the present invention includes a first electrode, a second electrode, and a layered oxide arranged between the first electrode and the second electrode. The first electrode, the layered oxide, and the second electrode are arranged in this order so that a multilayer is formed. The layered oxide is formed of electric conductive layers and electric insulating layers being alternately arranged. The C axis of the layered oxide is perpendicular to the interface between the first electrode and the layered oxide. The area of the second electrode is smaller than that of the first electrode.
摘要:
A thermoelectric transducing material according to this invention includes a layered cobaltite based substance represented by the chemical formula AxCoO2, wherein A consists of an element or element group selected from alkali metal elements and alkali earth group elements and is compositionally modulated in a thickness-wise direction of layers in a structure of the layered cobaltite based substance.
摘要:
This invention provides a superconducting device with good characteristics that can be reproduced at an arbitrary place on a substrate and a method of manufacturing the same. A convex region (a processed, linearly-shaped platinum thin film) of oriented metal is provided on a substrate as a gate electrode. Then, an oxide insulating film (SrTiO.sub.3 thin film) is deposited on the convex region, and further a YBa.sub.2 Cu.sub.3 O.sub.7 oxide superconducting thin film is deposited on the oxide insulating film. Accordingly, a grain boundary part is formed on the convex region. A drain electrode and a source electrode are formed facing each other with the grain boundary part in between.
摘要:
The present invention provides a vertical current-type magneto-resistive element. The element includes an intermediate layer and a pair of magnetic layers sandwiching the intermediate layer, and at least one of a free magnetic layer and a pinned magnetic layer is a multilayer film including at least one non-magnetic layer and magnetic layers sandwiching the non-magnetic layer. The element area defined by the area of the intermediate layer through which current flows perpendicular to the film is not larger than 1000 μm2.
摘要:
A magneto-resistive device and a magneto-resistive effect type storage device are provided, which have improved selectivity and output signals by controlling bias to be applied. Two resistive devices are connected in series, and a magneto-resistive device is used for at least one of the resistive devices. When both of the resistive devices are magneto-resistive devices, their magnetic resistance should be controlled independently from each other, and by allowing the first magneto-resistive device to include a nonmagnetic substance of an electrical insulator and the second magneto-resistive device to include a nonmagnetic substance of a conductive substance, the second magneto-resistive device is operated as a bias control device for controlling the characteristics of the first magneto-resistive device so as to control the voltage to be applied to the storage device. Furthermore, when the other resistive device is configured to be a varistor type device, bias from the non-selected storage device is suppressed to improve the selectivity of the storage device.
摘要:
A process for forming a laminate of 123-type copper oxide superconductor thin films having dissimilar crystal axis orientations, a laminate of 123-type thin copper oxide superconductor layers exhibiting excellent superconducting property, and wiring for Josephson junction. A c-axis oriented single crystalline thin film of an oxide superconductor having a Y:Ba:Cu atomic ratio of substantially 1:2:3 and a lattice constant of 11.60 angstroms.ltoreq.c.ltoreq.11.70 angstroms at a temperature of 20.degree. C. under an oxygen partial pressure of 160 Torr is formed on a single crystalline substrate, and an a-axis oriented single crystalline thin film of said oxide superconductor is formed on the above laminated film relying upon a sputter deposition method.
摘要:
The present invention provides a magnetoresistive element that includes a pair of magnetic layers and an intermediate layer between the magnetic layers. The intermediate layer contains at least three elements selected from Groups 2 to 17, and the elements include at least one selected from the group consisting of F, O, N, C and B. According to the invention, a magnetoresistive element with high magnetoresistance change ratio and low resistance can be provided. The invention also provides a method for producing a magnetoresistive element. The method includes forming a precursor and forming at least one part of the intermediate layer from the precursor. The precursor is reacted with at least one reactive species selected from the group consisting of oxygen atoms, nitrogen atoms and carbon atoms in a reactive atmosphere containing the reactive species.
摘要:
A magnetic switching device of the present invention includes: at least one transition member; at least one electrode; and at least one free magnetic member. The transition member contains a perovskite compound that contains at least a rare earth element and an alkaline-earth metal, the electrode and the free magnetic member are arranged in parallel and in a noncontact manner on the transition member, at least one of the free magnetic members is coupled magnetically with the transition member, and the transition member undergoes at least ferromagnetism-antiferromagnetism transition by injecting or inducing electrons or holes, whereby a magnetization direction of at least one of the free magnetic members changes. This configuration is applicable to a magnetic memory that records/reads out magnetization information of the free magnetic layer and various magnetic devices that utilize a resistance change of the magnetoresistive effect portion.
摘要:
The present invention provides a magnetoresistive element in which discontinuity at a barrier layer interface is provided by utilizing a layered-perovskite oxide, and a device in which the foregoing magnetoresistive element is used. The element of the present invention includes a layered-perovskite oxide having a composition expressed by a formula L2(A1−zRz)2An−1MnO3n+3+x and including a (L-O)2 layer in its crystalline structure, and a pair of ferromagnetic bodies formed in contact with the layer perovskite oxide so as to sandwich the oxide. In response to bias application via the (L-O)2 layer, a magnetoresistive tunnel effect appears. In the foregoing formula, A represents at least one alkaline earth element selected from the group consisting of Ca, Sr, and Ba, L represents at least one element selected from the group consisting of Bi, Tl, and Pb, M represents at least one element selected from the group consisting of Ti, V, Cu, Ru, Ni, Mn, Co, Fe, and Cr, R represents a rare earth element, n is 1, 2, or 3, and x and z are numerical values satisfying −1≦x≦1, and 0≦z
摘要:
A superconducting element is disclosed which includes a substrate and a superconducting layer provided on the substrate and formed of an oxide having the following chemical formula: RBa.sub.2 (Cu.sub.1-x M.sub.x).sub.3 O.sub.7 wherein R represents at least one element selected from the group consisting of Y, La, Nd, Pm, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, M represents at least one element selected from the group consisting of Al, Ti, V, Cr, Mn, Fe, Co, Ni, Zn and Ga, and x represents a number of less than 1 but greater than 0.