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Displaying 1301 - 1325 of 3361

NIST MISE EN PRATIQUE FOR THE REALIZATION AND DISSEMINATION OF THE REDEFINED KILOGRAM

October 1, 2016
Author(s)
Patrick J. Abbott, Eric Benck, Corey A. Stambaugh, Edward C. Mulhern, Zeina J. Kubarych
The SI unit of mass, the kilogram, is scheduled to be redefined in 2018 as part of a broader redefinition of the SI in terms of fundamental constants. The kilogram will be realized in terms of the Planck constant within a vacuum environment. This

Epitaxially-grown self-assembled Bi2Se3/Bi2MnSe4 multilayer heterostructures

August 14, 2017
Author(s)
Joseph A. Hagmann, Xiang Li, Si-Ning Dong, Sergei Rouvimov, Sujitra J. Pookpanratana, Kin Man Yu, Tatyana Orlova, Curt A. Richter, David G. Seiler, Xinyu Liu, Jacek K. Furdyna, Margaret Dobrowolska
Progress in understanding topologically non-trivial systems offers the promise of predicting novel systems that demonstrate the remarkable properties associated with topological systems, such as unidirectional spin-polarized surface current and the

Spin Dependent Charge Pumping in SiC Metal-Oxide-Semiconductor Field-Effect-Transistors

August 25, 2011
Author(s)
Brad Bittel, Patrick Lenahan, Jason Ryan, Jody Fronheiser, Aivars Lelis
We demonstrate a very powerful electrically detected magnetic resonance (EDMR) technique, spin dependent charge pumping (SDCP) and apply it to 4H SiC metal-oxide-semiconductor field-effect-transistors (MOSFETs). SDCP combines a widely used electrical

Spin-lattice entanglement in CoPS3

June 10, 2025
Author(s)
Angela Hight Walker, Kevin Garrity, Rebecca Dally
Complex chalcogenides in the MPS3 family of materials (M = Mn, Fe, Co, and Ni) display remarkably different phase progressions depending upon the metal center orbital filling, character of the P–P linkage, and size of the van der Waals gap. There is also a

Six Jacob Rabinow's Inventions -- WEB Pages for NIST Virtual Museum

Author(s)
J Rabinow
Jacob Rabinow holds 230 U.S. patents on a variety of mechanical and electrical devices. Among these are the automatic letter-sorting machine used by the U.S. Post Office, the magnetic particle clutch, formerly used in several European automobiles, in

Design for a multifrequency high magnetic field superconducting quantum interference device-detected quantitative electron paramagnetic resonance probe: Spin-lattice relaxation of cupric sulfate pentahydrate (CuSO 4 &#82265H 2 O

November 1, 2004
Author(s)
Brant Cage, Stephen E. Russek
… of electron paramagnetic resonance (EPR) at high magnetic fields and frequencies. It uses a superconducting … quantum interference device (SQUID) for measuring the magnetic moment as a function of the applied magnetic field and microwave frequency. We used powdered …

Entropy-assisted nanosecond stochastic operation in perpendicular superparamagnetic tunnel junctions

July 2, 2025
Author(s)
Lucile Soumah, Louise Desplat, Nhat-Tan PHAN, Ahmed SIDI EL VALLI, Advait Madhavan, Florian DISDIER, Auffret Stephane, Ricardo Sousa, Ursula Ebels, Mark Stiles, Philippe Talatchian
We demonstrate a good agreement between mean dwell times measured in 50nm diameter, perpendicularly magnetized superparamagnetic tunnel junctions (SMTJ), and theoretical predictions based on Langer's theory. Due to a large entropic contribution, the theory

Neutron Scattering Studies of the Ferroelectric Distortion and Spin Dynamics in the Type-1 Multiferroic Perovskite Sr 0.56 Ba 0.44 MnO 3

October 9, 2014
Author(s)
Daniel K. Pratt, Jeffrey W. Lynn, James Mais, Omar Chmaissem, Dennis E. Brown, Stanislaw Kolesnik, Bogdan Dabrowski
The magnetic order, spin dynamics, and crystal structure of the multiferroic Sr 0.56Ba 0.44MnO 3 have been investigated using neutron and x-ray scattering. Ferroelectricity develops at T c=305 K with a polarization of 4.2 υC/cm 2 associated with the

Microfabricated Atomic Magnetometers and Applications

May 19, 2008
Author(s)
John E. Kitching, Svenja A. Knappe, Vishal Shah, P Schwindt, William C. Griffith, Ricardo Jimenez Martinez, Jan Preusser
We describe recent work at NIST to develop compact, sensitive atomic magnetometers using a combination of precision optical spectroscopy, atomic physics and techniques of micro-electro-mechanical systems (MEMS). These instruments have sensor head volumes

Magnetic-field sensitive charge density wave orders in the superconducting phase of UTe2

July 19, 2022
Author(s)
Anuva Aishwarya, Julian May-Mann, Arjun Raghavan, Laimei Nie, Marisa Romanelli, Sheng Ran, Shanta Saha, Johnpierre Paglione, Nicholas Butch, Eduardo Fradkin, Vidya Madhavan
… gives rise to daughter CDWs which would be sensitive to magnetic field due to their origin in a triplet PDW state, … explains our data. Our discovery of a CDW sensitive to magnetic fields and strongly intertwined with … Magnetic-field sensitive charge density wave orders in the …

Study of the neutron spin-orbit interaction in silicon

September 29, 2019
Author(s)
Thomas R. Gentile, Michael G. Huber, Muhammad D. Arif, Daniel Hussey, David Jacobson, Donald D. Koetke, Murray Peshkin, Thomas Dombeck, Paul Nord, Dimitry A. Pushin, Robert Smither
The neutron spin-orbit interaction, which results from the interaction of a moving neutron's magnetic dipole moment (MDM) with the atomic electric fields, induces a small rotation of the neutron's spin in one Bragg reflection. In our experiment neutrons

Temperature Dependence of Electron Magnetic Resonance Spectra of Iron Oxide Nanoparticles Mineralized in Listeria Innocua Protein Cages

October 16, 2012
Author(s)
Robert J. Usselman
… Electron magnetic resonance (EMR) spectroscopy was used to determine the magnetic properties of maghemite (gamma-F e 2O 3 ) … The first model leads to a nonphysical increase in the magnetic moment as the temperature is increased, but a … Temperature Dependence of Electron Magnetic Resonance Spectra of Iron Oxide Nanoparticles …

First-Principles Calculation of the Non-Adiabatic Spin Transfer Torque in Ni and Fe

December 16, 2011
Author(s)
Keith Gilmore, Ion Garate, Allan H. MacDonald, Mark D. Stiles
The magnetization dynamics of a ferromagnet subjected to an electrical current are given by an extension of the Landau-Lifshitz-Gilbert equation that contains two additional terms, the adiabatic and non-adiabatic spin-transfer torques. First-principles

Spin Transport for Spin Diffusion Lengths Comparable to Mean Free Paths

December 15, 2005
Author(s)
David R. Penn, Mark D. Stiles
In perpendicular-transport structures with magnetic and non-magnetic layers, there is a resistance associated with changes in the value of current polarization throughout the structure. Starting from a Boltzmann equation Valet and Fert derived macroscopic
Displaying 1301 - 1325 of 3361
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