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Search Publications

NIST Authors in Bold

Displaying 951 - 975 of 3361

Universal Dynamic Magnetism in Yb Pyrochlores with Disparate Ground States

March 14, 2016
Author(s)
A. M. Hallas, J. Gaudet, Nicholas Butch, M. Tachibana, R. S. Freitas, G. M. Lake, C. R. Wiebe, B. D. Gaulin
… of magnetic behaviors are observed. The low temperature magnetism in Yb d2^Ti 2 O 7 and Yb 2 Sn 2 O 7 has … Universal Dynamic Magnetism in Yb Pyrochlores with Disparate Ground States …

Highly Charged Ions in Rare Earth Permanent Magnet Penning Traps

July 13, 2012
Author(s)
Nicholas D. Guise, Samuel Brewer, Joseph Tan
… In a room-temperature prototype trap with a single NdFeB magnet, species including Ne10+ and N7+ were confined with … a second-generation apparatus that incorporates this two-magnet Penning trap along with a fast time-of-flight MCP … charge-state evolution of trapped ions. Holes in the two-magnet Penning trap ring electrode allow for optical and …

Tuning the Magnetic Ground State of Ce 1-x Yb x RhIn 5 by Yb Valence Fluctuations

November 16, 2018
Author(s)
S. Jang, N. Pouse, T. Keiber, B. D. White, S. M. Disseler, Jeffrey W. Lynn, J. C. Collini, M. Janoschek, F. Bridges, M. B. Maple
… x-ray spectroscopy (EDS), electrical resistivity, magnetic susceptibility, specific heat, x-ray absorption near … diffraction. The Yb valence, υYb, calculated from the magnetic susceptibility and measured using XANES, decreases … T 1 (T 1 < T n ) for the same concentration range. Magnetic susceptibility measurements also reveal features …

Spin-Polarized Photoemission Spectroscopy of Magnetic Surfaces Using Undulator Radiation

January 1, 1992
Author(s)
Philip Johnson, S Hulbert, R Klaffky, N Brookes, Andrew Clarke, B Sinkovic, N. Smith, Robert Celotta, Michael H. Kelley, Daniel T. Pierce, M Scheinfein, B Waclawski, B.O. Wells
… to perform angle-resolved photoemission experiments on magnetic surfaces with spin sensitivity. The system has two … Spin-Polarized Photoemission Spectroscopy of Magnetic Surfaces Using Undulator Radiation …

High-speed low-power neuromorphic systems based on magnetic Josephson junctions

October 25, 2018
Author(s)
Michael Schneider, Christine A. Donnelly, Stephen E. Russek
… can be controlled and modulated by incorporating nanoscale magnetic structure in the barrier. The magnetic state of embedded nanoclusters can be changed by … and supervised learning. The advantage of this magnetic superconducting technology is that it combines …

In situ Dimensional Characterization of Magnetic Nanoparticle Clusters during Induction Heating

January 1, 2020
Author(s)
Hayden Carlton, Kathryn L. Krycka, Markus Bleuel, David Huitink
… The study and fundamental understanding of magnetic nanoparticle induction heating remain critical for the advancement of magnetic hyperthermia technologies. Complete characterization … of iron oxide nanoparticles with differing structures and magnetic properties. By fitting the scattering profiles to a …

On the nature of asymetry of nucleation centers activity in ultrathin Co films and Co/Pt multilayers

January 14, 2008
Author(s)
Yu L. Iunin, Yury P. Kabanov, Valerian I. Nikitenko, X M. Cheng, Alexander J. Shapiro, C L. Chien, Robert D. Shull
Magnetization reversal in ultrathin Pt(10 nm)/Co(0.6 nm)/Pt(3 nm) magnetic films and Pt(10 nm)/[Co(d)/Pt(1 nm)]_n}/ Pt(2 nm) (d = 0.4, 0.6, 0.8 nm, n = 2, 4) multilayers with perpendicular anisotropy has been studied using Kerr microscopy. These materials

Magnetic-Field Imaging of Weakly Bound Levels of the Ground-State Na 2 Dimer

February 1, 2002
Author(s)
T Laue, Eite Tiesinga, C Samuelis, H Knockel, E Tiemann
… We measured in a molecular beam experiment the magnetic field dependence of the last bound levels of the X 1 … Na 2 . The field behavior of these levels in an external magnetic field differs for even or odd nuclear mechanical … leads to a precise and quantitative description of the magnetic decoupling of the singlet and triplet manifold and …

Spin Canting Across Core/Shell Fe 3 O 4 /Mn x Fe 3-x O 4 Nanoparticles

February 21, 2018
Author(s)
Samuel D. Oberdick, Ahmed Abdelgawad, Carlos Moya, Samaneh Mesbahi-Vasey, Demie Kepaptsoglou, Vlado K. Lazarov, Richard F. L. Evans, Daniel Meilak, Elizabeth Skoropata, Johan van Lierop, Ian Hunt-Isaak, Hillary Pan, Yumi Ijiri, Kathryn L. Krycka, Julie Borchers, Sara A. Majetich
Core/shell Fe 3dO 4/Mn xFe 3-xO 4 nanoparticles were synthesized in a single reaction using molecular precursors with different thermal stability. Scanning transmission electron microscopy combined with electron energy loss spectroscopy confirms the core

Magnetic Structure and Ordering of Multiferroic Hexagonal LuFeO 3

May 29, 2015
Author(s)
Steven M. Disseler, Julie A. Borchers, Charles M. Brooks, Julia A. Mundy, Jarrett A. Moyer, Daniel A. Hillsberry, Eric L. Thies, Dmitri A. Tenne, John Heron, Megan Holtz, James D. Clarkson, Gregory M. Stiehl, Peter Schiffer, David A. Muller, Darrell G. Schlom, William D. Ratcliff
… We report on the magnetic structure and ordering of hexagonal LuFeO 3 films of … reported in hexagonal LuFeO 3 films. The symmetry of the magnetic structure in the ferroelectric state implies that … Magnetic Structure and Ordering of Multiferroic Hexagonal …

Stripe Helical Magnetism and Two Regimes of Anomalous Hall Effect in NdAlGe

March 27, 2023
Author(s)
Hung-Yu Yang, Jonathan N. Gaudet, Rahul Verma, Santu Baidya, Faranak Bahrami, Xiaohan Yao, Cheng-Yi Huang, Lisa Debeer-Schmitt, Adam A. Aczel, Guangyong Xu, Hsin Lin, Arun Bansil, Bahadur Singh, Fazel Tafti
… and a long-wavelength of ∼ 35 nm. This incommensurate magnetism onsetsbelow Tinc = 6.8(2) K, and the spin structure … respectively. While the same type of Weyl-mediated helical magnetism as NdAlSi is revealed in NdAlGe, the transport … fluctuations. Our study suggests that Weyl-mediated magnetism may prevail in this group of noncentrosymmetric …

Hydration-Induced Spin-Glass State in a Frustrated Na-Mn-O Triangular Lattice

May 18, 2016
Author(s)
Ioanna Bakaimi, Rosaria Brescia, Craig Brown, Alexander A. Tsirlin, Mark A. Green, Alexandros Lappas
Birnessite compounds are stable across a wide range of compositions that produces a remarkable diversity in their physical, electrochemical and functional properties. These are hydrated analogues of the magnetic frustrated, mixed-valent manganese oxide

Disorder from Order Among Anisotropic Next-Nearest-Neighbor Ising Spin Chains in SrHo 2 O 4

February 26, 2015
Author(s)
J.-J. Wen, W. Tian, V. O. Garlea, S. M. Koohpayeh, T. M. McQueen, H.-F. Li, J.-Q. Yan, Jose Rodriguez Rivera, D. Vaknin, Collin L. Broholm
We describe why Ising spin chains with competing interactions in SrHo 2O 4 segregate into ordered and disordered ensembles at low temperatures (T). Using elastic neutron scattering, magnetization, and specific heat measurements, the two distinct spin

Modification of edge mode dynamics of oxidized Ni 80 Fe 20 thin film edges

May 20, 2010
Author(s)
Meng Zhu, Robert D. McMichael
We use ''edge mode'' ferromagnetic resonance (FMR) to probe the magentic properties of oxidized Ni 80Fe 20 (Py) nanostripe edges. The oxidation is carried out using either oxygen plasma or thermal annealing in an oxygen ambient. We find that for both

High frequency magnetic field sensors based on the faraday effect in garnet thick films

April 27, 1992
Author(s)
R. Wolfe, E. M. Gyorgy, R. A. Lieberman, V. J. Fratello, S. J. Licht, M. N. Deeter, Gordon W. Day
… The Faraday effect in the thick epitaxial films of magnetic garnets of the type used in magnetooptic isolators can be used as the basis for a fiber-optic magnetic field sensor. These films have uniaxial anisotropy … bismuth to enhance the Faraday rotation. The typical magnetic domain pattern of meandering stripes changes in …

Magnetic Properties of Epitaxial CoCr Films with Depth-Dependent Exchange-Coupling Profiles

April 27, 2017
Author(s)
Lorenzo Fallarino, Brian Kirby, Matteo Pancaldi, Patricia Riego, Andrew L. Balk, Casey W. Miller, Paolo Vavassori, A. Berger
… a study of the compositional and temperature dependent magnetic properties of epitaxial CoCr thin films whose … T > 260 K, indicating a transition from a fully correlated magnetic film structure to an uncoupled system containing effectively two independent magnetic sublayers. Corroborating evidence of the temperature …

Demonstration of Impedance Matching Using a mu-Negative (MNG) Metamaterial

April 14, 2009
Author(s)
Christopher L. Holloway, R. B. Greegor, C. G. Parazzoli, J. A. Nielsen, M. H. Tanielian, D Vier, S Schultz, Richard Ziolkowski
A mu-negative (MNG) metamaterial hemisphere was used to demonstrate impedance matching for a magnetic loop. The metamaterial was comprised of copper spirals deposited on an alumina substrate. The spirals, hemisphere, and magnetic loop were designed to

Distinct Magnetic Spectra in the Hidden Order and Antiferromagnetic Phases in URu 2-x Fe x Si 2

November 7, 2016
Author(s)
Nicholas P. Butch, Sheng Ran, Inho Jeon, Noravee Kanchanavatee, Kevin Huang, Alexander Breindel, M. Brian Maple, Ryan L. Stillwell, Yang Zhao, Leland Weldon Harriger, Jeffrey W. Lynn
… We use neutron scattering to compare the magnetic excitations in the hidden order (HO) and … 2-x Fe x Fe x Si 2 as a function of Fe concentration. The magnetic excitation spectra change significantly between … of the HO phase vanish in the AFM phase. The magnetic scattering is dominated by strong excitations …

Magnetic Structure of Yb 2 Pt 2 Pb: Ising Moments on the Shastry-Sutherland Lattice

March 22, 2016
Author(s)
W. Miiller, L. S. Wu, M. S. Kim, T. Orvis, J. W. Simonson, M. Gamza, D. M. McNally, C. S. Nelson, G. Ehlers, A. Podlesnyak, Joel Helton, Yang Zhao, Yiming Qiu, John R. Copley, Jeffrey W. Lynn, I. Zaliznyak, M. C. Aronson
… 2 Pb orders antiferromagnetically at T N =2.07 K, and the magnetic structure determined from these measurements … interleaving of two orthogonal sublatttices into a 5x5x1 magnetic supercell that is based on stripes with moments … to the dimer bonds, which are along (110) and (-100). Magnetic fields applied along (100) or (-100) suppress the …

Pulsed inductive microwave magnetometer

October 1, 2002
Author(s)
Anthony B. Kos, Thomas J. Silva, Pavel Kabos
We describe the apparatus, software, and measurement procedures for a pulsed inductive microwave magnetometer (PIMM). PIMM can measure the dynamical properties of materials used in recording heads for magnetic storage applications and it can be used as a
Displaying 951 - 975 of 3361
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