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Search Publications

NIST Authors in Bold

Displaying 201 - 225 of 3361

Spin-Current Induced Magnetotransport in Co/Cu/Co Nanostructures

September 1, 2002
Author(s)
Fred B. Mancoff, Stephen E. Russek
We report measurements on sub-100 nm current-perpendicular-to-place Co/Cu/Co spin-valves. The giant magnetoresistance versus applied magnetic field shows the switching in individual patterned Co nanomagnets. Spin transfer from the spin-polarized current to

Detection of Pinholes in Ultrathin Films by Magnetic Coupling

January 1, 2001
Author(s)
William F. Egelhoff Jr., L Gan, P J. Chen, Cedric J. Powell, Robert McMichael, R A. Fry
… When two magnetic films are separated by a nonmagnetic film, pinholes … nonmagnetic film can allow direct contact and, thereby, magnetic coupling between the two magnetic films. We have studied this coupling by having one … akynubyn oxide, copper, magnetic thin films, pinholes …

Magnetic Fluids' Phase Transition Between Micelle and Mono-Dispersed Phases

April 18, 2006
Author(s)
S Taketomi, R V. Drew, Robert D. Shull
… A very stably dispersed magnetic fluid (Mother MF) and its 1000-times diluted … from room temperature to 5 K followed by application of a magnetic field of 2.86 MA/m for 300 seconds. After the field … in the solvent trigger the generation the generation of magnetic colloids micelles. In other words, there occurs a …

Magnetic Field Tuning of Antiferromagnetic Yb 3 Pt 4

October 11, 2011
Author(s)
L. S. Wu, Y. Janssen, C. Marques, M. C. Bennett, M. S. Kim, K. Park, Songxue Chi, Jeffrey W. Lynn, G. Lorusso, G. Biasiol, M.C. Aronson
… specific heat, magnetization, magnetocaloric effect and magnetic neutron diffraction carried out on single cyrstals … decreasing temperature, but the related divergences in the magnetic susceptibility are cut off at the lowest … Heavy Fermion, Antiferromagnet, Magnetic Field Dependence, Quantum Critical Endpoint, Neutron …

Micromagnetic Study of Soft Magnetic Nanowires

December 27, 2019
Author(s)
Farzad Ahmadi, Michael J. Donahue, Yilmaz Sozer, Igor Tsukerman
… In this paper, micromagnetic analysis of an array of long magnetic nanowires (NWs) embedded in a nonmagnetic matrix is … external fields. The study shows a vortex behavior of the magnetic moments in the magnetization reversal process. … way for designing of NW-based devices such as optimized magnetic sensors for biomedical applications with a trade-off …

Magnetic Technology Division: Programs, Activities, and Accomplishments

December 31, 2001
Author(s)
Ronald B. Goldfarb
… The Magnetic Technology Division develops and disseminates unique … measurement technology for industries concerned with magnetic information storage and superconductor power. The … magnetic recording measurements, magnetic thin films and devices, magnetodynamics, Nanoprobe …

Interface-induced phenomena in magnetism

June 5, 2017
Author(s)
Frances Hellman, Axel Hoffmann, Yaroslav Tserkovnyak, Geoffrey S. Beach, Eric E. Fullerton, C. Leighton, Allan H. MacDonald, Daniel C. Ralph, Dario A. Arena, Hermann A. Duerr, Peter Fischer, Julie Grollier, Joseph P. Heremans, Tomas Jungwirth, alexay V. Kimel, Bert Koopmans, Ilya N. Krivorotov, Steven J. May, Amanda K. Petford-Long, James M. Rondinelli, Nitin Samarth, Ivan K. Schuller, Andrei N. Slavin, Mark D. Stiles, Oleg Tchernyshyov, Andre Thiaville, Barry L. Zink
… article reviews static and dynamic interfacial effects in magnetism, focusing in particular on the current explosion in … article highlights recent discoveries of interface-induced magnetism and non-collinear spin textures, non-linear … Interface-induced phenomena in magnetism …

High-Frequency Behavior and Damping of Fe Co N-Based High-Saturation Soft Magnetic Films

January 1, 2002
Author(s)
Thomas J. Silva, S X. Wang, Sun X. N., Anthony B. Kos
… scale have been performed on Fe Co N high-saturation soft magnetic films with Permalloy nanolayer seeds and having a … Gilbert equation: critical damping occurs in a soft magnetic film when the damping parameter is a= 2/sqrt(x0), … Behavior and Damping of Fe Co N-Based High-Saturation Soft Magnetic Films …

Continuum of Quantum Fluctuations in a Three-Dimensional S = 1 Heisenberg Magnet

January 1, 2019
Author(s)
K. W. Plumb, Hitesh J. Changlani, A. Scheie, Shu Zhang, J. W. Krizan, Jose Rodriguez Rivera, Yiming Qiu, B. Winn, R. J. Cava, Collin L. Broholm
… a continuum has not been observed in a three-dimensional magnet. The antiferromagnetic Heisenberg model on a … Fluctuations in a Three-Dimensional S = 1 Heisenberg Magnet …

Small Angle Neutron Scattering by the Magnetic Microstructure of Nanocrystalline Ferromagnets Near Saturation

May 1, 1999
Author(s)
J Weissmuller, Robert McMichael, A Michels, Robert D. Shull
… The paper presents a theoretical analysis of elastic magnetic small angle neutron scattering (SANS) due to the nonuniform magnetic microstructure in nanocrystalline ferromagnets. The … In the limit where the scattering volume is a single magnetic domain, and the magnetization is nearly aligned with …

Measurement of Hydrogen in Metal Alloys by Magnetic and Electronic Techniques

January 1, 2004
Author(s)
P. Termsuksawad, S. Niyomsoan, Ronald B. Goldfarb, V I. Kaydanov, David Olson, B. Mishra, Z Gavra
… As demonstrated in this paper, magnetic and electronic measurements can be used to quantify … electronic structure, hydrogen absorption, magnetic measurements, magnetization, metal hydrides, Seebeck … Measurement of Hydrogen in Metal Alloys by Magnetic and Electronic Techniques …

IMPROVEMENT OF REPRODUCIBILITY OF MAGNETIC MOMENT DETECTED BY A SQUID MAGNETOMETER THROUGH RADIAL OFFSET MEASUREMENT ON A YIG SPHERE

September 19, 2018
Author(s)
Cindi L. Dennis, Robert D. Shull, Nobuhiro Matsumoto
… spheres, both having a diameter of 1 mm: (1) the NIST magnetic moment standard reference material (SRM) and (2) a … of the second-gradiometer coil. The observed value of the magnetic moment will be theoretically a minimum when the … manner with the radial offset. When the magnetic moment of the SRM was repeatedly measured as a …

Nuclear Magnetic Resonance Spectroscopy

October 31, 2005
Author(s)
Thomas J. Bruno, Paris D. Svoronos
… information for the design and interpretation of nuclear magnetic resonance (NMR) measurements. … correlation charts, nuclear magnetic resonance (NMR) … Nuclear Magnetic Resonance Spectroscopy …

Evolution of Magnetic Interactions in Sb-Substituted MnBi 2 Te 4

August 2, 2021
Author(s)
S. Riberolles, Q. Zhang, Elijah Gordon, Nicholas Butch, Liqin Ke, J.-Q. Yan, R. McQueeney
… and inelastic neutron scattering studies of the magnetic interactions across this series. All compounds … In addition to broadening, we observe an additional sharp magnetic excitation in MnSb 2 Te 4 that may indicate the development of local magnetic modes based on recent reports of antisite disorder …

Preisach-Arrhenius Model for Thermal Aftereffect

September 1, 2002
Author(s)
Edward Della Torre, Lawrence H. Bennett, R A. Fry, O A. Ducal
… as a measurement of the long-term stability of permanent magnet media. This paper demonstrates that this measurement …

Non-Arrhenius Temperature Dependence of Magnetic After Effect

May 1, 2000
Author(s)
L Swartzendruber, P Rugkwamsook, Lawrence H. Bennett, Edward Della Torre
… The rate of magnetization change (magnetic aftereffect) which occurs after the magnetic field applied to a magnetic material is switched suddenly to a new value, is … magnetic aftereffect, magnetocrystalline anisotropy, … Non-Arrhenius Temperature Dependence of Magnetic After Effect …

Connection between f-electron correlations and magnetic excitations in UTe2

January 4, 2025
Author(s)
Thomas Halloran, Peter Czajka, Gicela Saucedo Salas, Corey Frank, Jose Rodriguez Rivera, Daniel Mazzonne, Jakob Lass, Nicholas Butch
… anisotropic dispersion of the low-temperature, low-energy magnetic excitations of the candidate spin-triplet … UTe 2 is revealed using inelastic neutron scattering. The magnetic excitations emerge from the Brillouin zone boundary … the crystallographic $$\hatb}$$ b ̂ -axis. In applied magnetic fields to at least μ 0 H = 11 T along the …

Interparticle Interaction Effects in the Magnetic Properities NiO Nanorods

May 1, 2005
Author(s)
M Seehra, H Shim, P Dutta, A Manivannan, John E. Bonevich
… Magnetic properties of sol-gel synthesized 5 nm nanorods of … (5 K to 300 K) of the magnetization and electron magnetic resonance (EMR) spectra at 9.28 GHz were measured to … temperatures Tb(m) and Tb(emr). For these particles with magnetic moment/particle 1200 B, following differences are …

Magnetic Ordering in a Frustrated Bow-Tie Lattice

April 28, 2018
Author(s)
Laura J. Vera Stimpson, Efrain E. Rodriquez, Craig Brown, Gavin B. G. Stenning, Marek Jura, Donna C. Arnold
… Ca 2+ occupying octahedral sites between MnO 6 layers. Magnetic refinements of neutron powder diffraction data … below approximately equal} 50 K. In addition, short range magnetic correlations can be seen to persist, until … frustration, magnetism, neutron scattering, magnetic structure, inelastic neutron scattering …

Magnetic Anisotropy and Thermal Stability of Ta-pinned Spin Valves

January 1, 2001
Author(s)
R A. Fry, Robert D. McMichael, John E. Bonevich, P J. Chen, William F. Egelhoff Jr., Chang H. Lee
… by a 2.5 nm Cu spacer layer. We describe measurements of magnetic anisotropy and thermalstability in these Ta-pinned … Magnetic Anisotropy and Thermal Stability of Ta-pinned Spin … giant magnetoresistance, GMR, magnetic anisotropy, spin valves, Ta-pinned spin valves …

Evaluating the Effects of Structural Disorder on the Magnetic Properties of Nd 2 Zr 2 O 7

August 9, 2021
Author(s)
Eli Zoghlin, Julian Schmehr, Collin Holgate, Rebecca Dally, Yaohua Liu, Geneva Laurita, Stephen Wilson
… between synthesis environment, structural disorder, and magnetic properties. Using a combination of polycrystalline … and single-crystal neutron scattering data show that the magnetic properties of crystals grown under high-pressure Ar … scattering measurements reveal that the signature of magnetic moment fragmentation – the coexistence of …

Phenomenological Theory of Current-Induced Magnetization Precession

February 13, 2004
Author(s)
Mark D. Stiles, J Xiao, A Zangwill
… can produce a precession-type instability of the magnetization. The fundamental origin of the instability is … component of this angular momentum perpendicular to the magnetization drives precessional motion that is opposed by … For many aspects of the problem, the variation of the magnetization in the direction of the current flows makes an …

Dynamic Constitutive Relations for Polarization and magnetization

October 1, 2001
Author(s)
James R. Baker-Jarvis, Pavel Kabos
… we develop constitute relations for materials where the magnetization and polarization may depend on both the … reversible and relaxation terms in the polarization and magnetization evolution equations include the possibility of … Dynamic Constitutive Relations for Polarization and magnetization …

Calculation of magnetic forces and torques on the Kibble coil

October 22, 2022
Author(s)
Stephan Schlamminger, Lorenz Keck, Frank Seifert, Leon Chao, Darine El Haddad, Shisong Li
… Analytically the force and torques on a coil in a field of magnetic flux density can be calculated one of two ways. The … segment, the force is obtained as a cross product with the magnetic flux density. Alternatively, the coil's energy in … a dot product of the differential surface element with the magnetic flux density is executed under the integral sign. …
Displaying 201 - 225 of 3361
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