USA As Represented by Secretary of the Navy

Enterprise Science Fund, LLC

University of Virginia Patent Foundation

Stuart A Wolf

Brian C Holloway

Philipp Braeuninger-Weimer

Vladimir Z Kresin

Lowell L Wood, Jr

Roderick A Hyde

Clarence T Tegreene

Nathan P Myhrvold

Muriel Y Ishikawa

Victoria Y H Wood

Charles Whitmer

David R Smith

William Henry Mangione-Smith

John Brian Pendry

Louis E Toth

Ulrich Strom

Cameron Myhrvold

Conor L Myhrvold

Alan Shane Edelstein

Mircea R Stan

Michael S Osofsky

Donald U Gubser

William L Lechter

Jeffrey M Pond

James C Culbertson

Kurt Weiser

Harvey S Newman

Frederic J Rachford

George Albert Sawatzky

Steven H Lawrence

Christoph Heil

John Claassen

Syed B Quadri

Badri N Das

Kenneth E Kihlstrom

Jiwei Lu

Thomas L Francavilla

A superconductor device includes a low-dimensional material with a critical temperature higher than a critical temperature corresponding to a bulk form of the low-dimensional material. The low-dimensional material can include shape and structural modifications of a low-dimensional material. The superconductor device can include various conformational arrangements of the low-dimensional material such as nanoribbons, nanotubes, or helices. The superconductor device can include functional groups, such as hydrogen, attached to the low-dimensional material. The superconductor device can include metallic clusters located in proximity to the low-dimensional material. The superconductor device can include a low-dimensional material which is a monolayer, bilayer or multilayer.

High temperature superconducting structures

A superconductor device includes a high superconductivity transition temperature enhanced from the raw material transition temperature. The superconductor device includes a matrix material and a core material. The enhancing matrix material and the core material together create a system of strongly coupled carriers. A plurality of low-dimensional conductive features can be embedded in the matrix. The low-dimensional conductive features (e.g., nanowires or nanoparticles) can be conductors or superconductors. An interaction between electrons of the low-dimensional conductive features and the enhancing matrix material can promote excitations that increase a superconductivity transition temperature of the superconductor device.

High temperature superconductor

The present invention proposes an electronic memory device comprising a memory line including a memory domain. The memory line may contain a number of memory domains and a number of fixed domains, wherein each memory domain stores a single binary bit value. A multiferroic element may be disposed proximate to each memory domain allowing the magnetization of the memory domain to be changed using a spin torque current, and ensuring the stability of the magnetization of the domain when it is not being written. The domain boundary between the memory domain and one of its adjacent fixed domains may thereby be moved. An antiferromagnetic element may be disposed proximate to each fixed domain to ensure the stability of the magnetization of these. The value of each memory domain may be read by applying a voltage to a magnetic tunnel junction comprising the memory domain and measuring the current flowing through it.

Magnetic random access memory device

A magnetic ferrite microwave resonator frequency tunable filter and method for tuning a filter having both a resonator portion and a tuning portion. The resonator portion has an input for receiving an electromagnetic signal and an output for emitting an electromagnetic signal. A tuning portion includes a magnetic ferrite element disposed in first and second magnetic fields generated by a fixed magnet and an electromagnet. The magnetic ferrite element has a magnetic permeability determined by the first and second magnetic fields. The first magnetic field places a ferromagnetic resonance frequency of the ferrite element near a frequency of the electromagnetic signal transmitted by the resonator portion. The second magnetic field is variable in response to a varying current supplied to the electromagnet to change the permeability of the ferrite element, to thereby alter the center frequency of the resonator, thereby facilitating tuning of the electromagnetic signal.

Magnetic ferrite microwave resonator frequency adjuster and tunable filter

A material for disposition on a surface comprising Fe, Co, or FeCo in the form of small single magnetic domain metallic clusters disposed in an insulating matrix of BN. The material may be utilized as a new absorbing material for radar microwave signals. Additionally, the material may be utilized on a magnetic storage substrate to form a new magnetic recording medium.

Phase-separated material (U)

Highly sensitive infrared detectors can be made from superconducting micrrip transmission lines, having a single ground plane, a dielectric substrate on the ground plane, and a thin film path of superconducting oxide on the substrate. These microstrip transmission lines can be fabricated into resonant or non-resonant structures. The detectors operate by detecting changes in a microwave signal transmitted through the microstrip, measures in the amplitude, frequency or time domains. An embodiment of this invention is an asymmetric ring interferometer, with or without a metal segment in the shorter leg of the interferometer. Another embodiment of this invention is a meander path transmission line, which, in certain configurations, may be used as a single element array with very high resolution in the direction parallel to the meander lines.

Microwave detection of a superconducting infrared sensor

A substantially single phase superconducting composition is formed from a of 1:2:3 molar ratio of fine powders of a superconducting rare earth oxide, CuO, and BaCo.sub.3. The mixed powders and shaped articles formed from the mixed powders are calcined, sintered, and cooled in an oxygen containing atmosphere. The cooling step is done slowly to convert the sample to the orthorhombic structure and to improve the superconducting properties. The article formed is a substantially single phase superconducting composition.

Method of making substantially single phase superconducting oxide

Large oriented crystals greater than one millimeter in length of high T.sub.c superconducting compounds are grown by mixing starting materials in the correct proportions to make the superconducting compound, forming a mixture. The CO.sub.2 is removed from the mixture and the ternary oxide of the compound is formed from the mixture. Next, the mixture is formed into a self-supporting green body and sintered at a sintering temperature at which the top of the self-supporting green body is molten and the bottom surface is solid. The self-supporting green body is held at the sintering temperature for a time, forming a sintered body. Next, the sintered body is cooled so that crystals form. After this step, the crystals can be further processed to increase their superconducting properties. Finally, the crystals are removed and processed for use.

Process for single crystal growth of high T.sub.c superconductors

A granular superconducting thin film bolometer made by anodizing a thin film of such materials as niobium nitride to form a thin granular film separated by and covered with the anodized oxide. The bolometer is cooled to its superconducting state and electrically connected to a biasing and detecting network. Its temporal response is better than 1 ns.

Fast granular superconducting bolometer

Thin superconducting NbCN films are deposited by reactive sputtering onto a dielectric substrate inside a vacuum chamber. The substrate is heated to a temperature of 600.degree.-1200.degree. C., ultra-pure Argon is introduced into the chamber, and niobium is presputtered from a high-purity target onto a shutter. A cyanogen and nitrogen gas mixture is introduced into the chamber at a rate of approximately 10.sup.-6 Torr liters/sec, and a shutter is opened exposing the substrate to the sputtered niobium. The deposited niobium reacts with the cyanogen-nitrogen gas mixture to form NbCN films of exceptional purity, and which exhibit superior superconductor properties.

Method of forming thin niobium carbonitride superconducting films of

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Stuart A Wolf