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Displaying 1976 - 2000 of 3361

Dissipation due to pure spin current generated by spin pumping

December 1, 2014
Author(s)
Wayne M. Saslow, Tomohiro Taniguchi
Based on spin-dependent transport theory and thermodynamics, we develop a generalized theory of the Joule heating in the presence of a spin current. Along with the conventional Joule heating consisting of an electric current and electro-chemical potential

Tunable Multiferroic Properties in Nanocomposite PbTiO3-CoFe2O4 Epitaxial Thin Films

October 12, 2021
Author(s)
Makoto Murakami, K S. Chang, M A. Aronova, C L. Lin, M-H Yu, Jason Hattrick-Simpers, M. Wuttig, Ichiro Takeuchi, C Gao, S E. Lofland, Leonid A. Bendersky
We report on the synthesis of PbTiO3-CoFe2)4 (PTO-CFO) multiferroic nanocomposite and continuous turning of their ferroic properties as a function of composition on thin-film composition spreads. Highest dielectric constant and non-linear dielectric signal

Note: A Radio Frequency Voltage-Controlled Current Source for Quantum Spin Manipulation

October 19, 2020
Author(s)
Daniel S. Barker, Alessandro Restelli, James A. Fedchak, Julia K. Scherschligt, Stephen P. Eckel
We present a design for a wide-bandwidth, voltage-controlled current source that is easily integrated with radiofrequency magnetic field coils. Our design uses current feedback to compensate for the frequency-dependent impedance of a radiofrequency antenna

Pressure Tuning of Collapse of Helimagnetic Structure in Au 2 Mn

November 27, 2017
Author(s)
I Lin NMN Liu, Maria J. Pascale, Juscelino Leao, Craig Brown, William D. Ratcliff, Qingzhen Huang, Nicholas Butch
We identify the phase boundary between spiral spin and ferromagnetic phases in Au 2Mn at a critical pressure of 16.4 kbar, as determined by neutron diffraction, magnetization and magnetoresistance measurements. The temperature-dependent critical field at a

Persistent Fe Moments in the Normal-State Collapsed-Tetragonal Phase of the Pressure-induced Superconductor Ca 0.67 Sr 0.33 Fe 2 As 2

October 13, 2014
Author(s)
J.R. Jeffries, Nicholas Butch, M.J. Lipp, J.A. Bradley, K. Kirshenbaum, Shanta Saha, J. Paglione, C. Kenny-Benson, Y. Xiao, P. Chow, W. J. Evans
Using non-resonant Fe Κ}β x-ray emission spectroscopy, we reveal that Sr-doping of CaFe 2As 2 decouples the Fe moment from the volume collapse transition, yielding a collapsed-tetragonal, para-magnetic normal state out of which superconductivity develops

Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium

April 8, 2011
Author(s)
T. Schuster, R. Scelle, A. Trautmann, J. Appmeier, S. Knoop, Eite Tiesinga, E. Tiemann
We have studied magnetic Feshbach resonances in an ultracold sample of Na prepared in the absolute hyperfine ground. W e report on the observation of three s-, eight d-, and three g-wave Feshbach resonances, including a more precis e determination of the

Collisional cooling of ultra-cold atom ensembles using Feshbach resonances

September 8, 2009
Author(s)
Ludwig G. Mathey, Eite Tiesinga, Paul S. Julienne, Charles W. Clark
We propose a new type of cooling mechanism for ultra-cold fermionic atom ensembles, which capitalizes on the energy dependence of inelastic collisions in the presence of a Feshbach resonance. We first discuss the case of a single magnetic resonance, and

Collimated spin wave beam generated by a single layer, spin torque nanocontact

April 1, 2008
Author(s)
Mark Hoefer, Thomas J. Silva, M D. Stiles
A model of spin-torque-induced magnetization dynamics based on semiclassical spin diffusion theory for a single-layer nanocontact in presented. The model incorporates effects due to the current-induced Oersted field and predicts the generation of a variety

Long-Lived Qubit Memory Using Atomic Ions

August 5, 2005
Author(s)
C. Langer, R Ozeri, John D. Jost, J Chiaverini, B. L. DeMarco, A. Ben-Kish, Brad R. Blakestad, Joseph W. Britton, David Hume, Wayne M. Itano, Dietrich G. Leibfried, Rainer Reichle, Till P. Rosenband, Tobias Schaetz, Piet Schmidt, David J. Wineland
We demonstrate experimentally a robust quantum memory using a magnetic-field-independent hyperfine transition in 9Be + atomic ioin qubits at a magnetic field B=0.01194 T. We observe the single physical qubit memory coherence time to be greater than 10

Measuring the Permittivity and Permeability of Lossy Materials: Solids, Liquids, Metals, and negative-Index Materials

February 1, 2005
Author(s)
James R. Baker-Jarvis, Michael D. Janezic, Billy F. Riddle, Robert T. Johnk, Christopher L. Holloway, Richard G. Geyer, Chriss A. Grosvenor
The goal of this report is to be a comprehensive guide for researchers int he area of dielectric and magnetic measurements of lossy materials. The goal is to assemble the relevant information needed to perform and interpret dielectric measurements on lossy

Combined 63,65 Cu NQR and NMR Study of Y 1-x Ca x Ba 2 Cu 3 O y

November 1, 2000
Author(s)
D M. Potrepka, J. I. Budnick, A R. Moodenbaugh, Daniel A. Fischer, W A. Hines
Zero-field 63,65Cu nuclear quadrupole resonance (NQR) and nuclear magnetic resonance (NMR) spectra were obtained at 1.3 K for powdered samples of Y 1-xCa xBa 2Cu 3O y with 0 less than or equal to} x less than or equal to} 0.20. The results for the

Structural and Dynamical Properties of Potassium Dodecahydro-Monocarba-Closo-Dodecaborate: KCB 11 H 12

August 20, 2020
Author(s)
Mirjana Dimitrievska, Hui Wu, Vitalie Stavila, Olga A. Babanova, Roman V. Skoryunov, Alexei V. Soloninin, Wei Zhou, Benjamin Trump
MCB 11H 12 (M: Li, Na) dodecahydro-monocarba-closo-dodecaborate salt compounds are known to have stellar superionic Li + and Na + conductivities in their high-temperature disordered phases, making them potentially appealing electrolytes in all-solid-state

Oriented 3D Magnetic Biskyrmions in MnNiGa Bulk Crystals

April 25, 2019
Author(s)
Xiyang Li, Shilei Zhang, Hang Li, Diego A. Venero, Jonathan S. White, R. Cubitt, Qingzhen Huang, Jie Chen, Lunhua He, Gerrit van der Laan, Wenhong Wang, Thorsten Hesjedal, Fangwei Wang
… Oriented 3D Magnetic Biskyrmions in MnNiGa Bulk Crystals …

Progress Towards Magnetic Trapping of Ultra-cold Neutrons

January 1, 2000
Author(s)
P R. Huffman, C R. Brome, J S. Butterworth, K Coakley, Maynard S. Dewey, S N. Dzhosyuk, David M. Gilliam, R G. Golub, G L. Greene, K Habicht, G L. Jones, Steve K. Lamoreaux, C E. Mattoni, D N. McKinsey, Fred E. Wietfeldt, John M. Doyle
… Progress Towards Magnetic Trapping of Ultra-cold Neutrons …
Displaying 1976 - 2000 of 3361
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