U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 1801 - 1825 of 3361

Tunable Resonant and Nonresonant Interactions between a Phase Qubit and LC Resonator

March 26, 2014
Author(s)
Michael S. Allman, Jed D. Whittaker, Manuel C. Castellanos Beltran, Katarina Cicak, Fabio C. Da Silva, Michael DeFeo, Florent Q. Lecocq, Adam J. Sirois, John D. Teufel, Jose A. Aumentado, Raymond W. Simmonds
We use a flux-biased radio frequency superconducting quantum interference device (rf SQUID) with an embedded flux-biased direct current SQUID to generate strong resonant and nonresonant tunable interactions between a phase qubit and a lumped-element

Gauge matters: Observing the vortex-nucleation transition in a Bose condensate

June 18, 2015
Author(s)
Ian B. Spielman, LeBlanc Lindsey, Karina Jimenez-Garcia, Ross Williams, Matthew Beeler, William D. Phillips
The order parameter of a quantum-coherent many-body system includes one or more phase degrees of freedom, which, owing to the phase information's relationship to velocity, can be accessed using time-of-flight (TOF) imaging. Here, trapped Bose-Einstein

Coexistence of Ferromagnetic Fluctuations and Superconductivity in the Actinide Superconductor UTe 2

October 23, 2019
Author(s)
Shyam Sundar, S. Gheidi, K. Akintola, A. M. Cote, S. R. Dunsiger, S. Ran, Nicholas Butch, S. R. Saha, J. Paglione, J. E. Sonier
We report low-temperature muon spin relaxation/rotation (υSR) measurements on single crystals of the actinide superconductor UTe 2. Below 5 K we observe a continuous slowing down of magnetic fluctuations, which persists through the superconducting

Bose-Einstein Condensates in Artificial Gauge Fields

May 1, 2017
Author(s)
Ian B. Spielman, Lindsay LeBlanc
Quantum mechanically, static or applied gauge fields manifest themselves by directly coupling to a system's phase. Artificial gauge field techniques manipulate the phase of a Bose-Einstein condensates's order parameter, yielding effects present in

Expansion of the High Field-Boosted Superconductivity in UTe 2 under Pressure

September 6, 2021
Author(s)
Sheng N. Ran, Shanta R. Saha, I-Lin Liu, David Graf, Johnpierre N. Paglione, Nicholas Butch
In semiclassical theory, the effect of quantized Landau levels on the critical magnetic field that destroys superconductivity is usually ignored. However, it has been theorized that the sharply enhanced density of states that occurs in extreme magnetic

Conductive Surface States and Kondo Exhaustion in Insulating YbIr3Si7

January 7, 2024
Author(s)
Macy Stavinoha, C.-L. Huang, W. Phelan, Alannah Hallas, V. Loganathan, M. Michiardi, J. Falke, Sergey Zhdanovich, D. Takegami, C.-E. Liu, K. Tsuei, C. Chen, Long Qian, Nicholas Ng, Jeffrey Lynn, Qingzhen Huang, Franziska Weickert, Vivien Zapf, Katharine Larsen, Patricia Sparks, James Eckert, Anand Puthirath, Hsiang-Hsi Kung, Tor Pedersen, Sergey Gorovikov, A. Damascelli, L. Tjeng, C. Hooley, Andriy Nevidomskyy, E. Morosan
The interplay of Kondo screening and magnetic ordering in strongly correlated materials containing local moments is a subtle problem. Usually the number of conduction electrons per unit cell matches or exceeds the number of moments, and a Kondo-screened

Disorder-Induced Excitation Continuum in a Spin-1/2 Cobaltate on a Triangular Lattice

July 31, 2023
Author(s)
Bin Gao, Tong Chen, Chien-Lung Huang, Yiming Qiu, Guangyong Xu, Jesse Liebman, Lebing Chen, Matthew B. Stone, Erxi Feng, Huibo Cao, Xiaoping Wang, Xianghan Xu, Sang-Wook Cheong, Stephen Winter, Pengcheng Dai
… antiferromagnet is a prototypical frustrated quantum magnet, which exhibits remarkable quantum many-body effects …

Monopolar and dipolar relaxation in spin ice Ho2Ti2O7

June 16, 2021
Author(s)
Yishu Wang, T. Reeder, Y. Karaki, J. Kindervater, T. Halloran, Nicholas C. Maliszewskyj, Yiming Qiu, Jose Rodriguez Rivera, Sergiy Gladchenko, S. M. Koohpayeh, S. Nakatsuji, Collin L. Broholm
Ferromagnetically interacting Ising spins on the pyrochlore lattice of corner-sharing tetrahedra form a highly degenerate manifold of low-energy states. A spin flip relative to this "spin-ice" manifold can fractionalize into two oppositely charged magnetic

Compensated Ferrimagnetism in the Zero-Moment Heusler Alloy Mn 3 Al

June 30, 2017
Author(s)
Michelle Elizabeth Jamer, Yung Jui Wang, Gregory M. Stephen, Ian J. McDonald, Alexander J Grutter, George E. Sterbinsky, Dario A. Arena, Julie A. Borchers, Brian J Kirby, Laura H. Lewis, Bernardo Barbiellini, Arun Bansil, Don Heiman
While antiferromagnets have been proposed as components to limit stray magnetic fields in spintronics devices, their inability to be spin polarized inhibits their use. Compensated ferrimagnets are a unique solution to this dilemma since they have zero net

Tunneling Magnetoresistance With Amorphous Electrodes

January 1, 2007
Author(s)
M Gradhand, Christian Heiliger, P Zahn, I Mertig
A detailed first principles analysis of the transport properties of different magnetic electrode materials for MgO tunnel junctions is performed to elucidate the microscopic origin of the TMR effect. The spin-dependent transport properties of the magnetic

Nanostructure Fabrication via Laser-Focused Atomic Deposition

April 15, 1996
Author(s)
Robert Celotta, R Gupta, R E. Scholten, Jabez J. McClelland
Nanostructured materials and devices will play an important role in a variety of future technologies, including magnetics. We describe a method for nanostructure fabrication based on the use of laser light to focus neutral atoms. The method uses neither a

Coherent spin pumping in a strongly coupled magnon-magnon hybrid system

March 17, 2020
Author(s)
Yi Li, Wei Cao, Vivek P. Amin, Zhizhi Zhang, Jonathan Gibbons, Joseph Sklenar, John Pearson, Paul M. Haney, Mark D. Stiles, William E. Bailey, Valentine Novosad, Axel Hoffmann, Wei Zhang
We have experimentally identified coherent spin pumping acting as a dampinglike coupling in the magnon-magnon hybrid modes of permalloy/yttrium iron garnet (Py/YIG) bilayers. Using broadband ferromagnetic resonance, an ''avoided crossing" is observed well

Co 25 Fe 75 Thin Films with Ultralow Total Damping

May 13, 2019
Author(s)
Eric R. Edwards, Hans T. Nembach, Justin M. Shaw
We measure the dynamic properties of Co 25Fe 75 thin films grown by dc magnetron sputtering. Using ferromagnetic resonance spectroscopy, we demonstrate an ultralow total damping parameter in the out-of-plane configuration of 0.0013, whereas for the in

Current Induced DomainWall Distortions

January 1, 2006
Author(s)
Willard C. Uhlig, John Unguris
We have directly imaged the spin transfer torque induced distortion of domain walls in current carrying ferromagnetic wires. Domain walls ranging from vortex walls in wide (1 m) wires, to transverse walls in narrow (100 nm) wires were studied. Scanning

Spin and Energy Analyzed Photoemission: A Feasibility Analysis

November 1, 1979
Author(s)
Daniel T. Pierce, C Kuyatt, Robert Celotta
New scientific opportunities, particularly for investigation of surface magnetism, will be provided by spin and energy analyzed photoemission. Electron-optical conservation laws and phase space concepts are summarized and applied to determine the

Resonant microwave power absorption and relaxation of the energy levels of the molecular nanomagnet Fe 8 using superconducting quantum interference device-based magnetometry

August 15, 2005
Author(s)
Brant Cage, Stephen E. Russek, David Zipse, Micah North, Naresh S. Dalal
Energy levels and saturation of molecular nanomagnet Fe 8 crystals were investigated using a 95 and 141 GHz electron paramagnetic resonance (EPR) technique based on a standard superconducting quantum intererence device (SQUID) magnetometer. The technique
Displaying 1801 - 1825 of 3361
Was this page helpful?