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Search Publications

NIST Authors in Bold

Displaying 826 - 850 of 3361

Direct imaging of coexisting ordered and frustrated sublattices in artificial ferromagnetic quasicrystals

April 25, 2016
Author(s)
Barry Farmer, Vinayak Bhat, Andrew L. Balk, Eric Teipel, Nathan Smith, John Unguris, D.J. Keavney, Todd Hastings, L .E. De Long
Quasicrystals are rarely found in nature and are difficult to grow in the laboratory, but exhibit unique physical properties resulting from their signature long-range structural order without periodic translational symmetry. Magnetic interactions in

Gapped Excitations in the High-Pressure Antiferromagnetic Phase of URu 2 Si 2

May 31, 2017
Author(s)
T. J. Williams, H. Barath, Z. Yamani, Jose Rodriguez Rivera, Juscelino Leao, J. D. Garrett, G. M. Luke, W.J. L. Buyers, Collin L. Broholm
We report a neutron scattering study of the magnetic excitation spectrum in each of the three temperature and pressure phases of URu 2Si 2. We find qualitatively similar excitations throughout the (H0L)scattering plane in the hidden order and large moment

Ferromagnetic resonance and magnetization switching characteristics of perpendicular magnetic tunnel junctions with synthetic antiferromagnetic free layers

January 4, 2022
Author(s)
deyuan lyu, Delin Zhang, Daniel Gopman, Yang Lv, Onri Benally, Jian-Ping Wang
… Perpendicular magnetic tunnel junctions (pMTJs) with synthetic … characterization and systemic investigations of their magnetization switching behavior remains limited. Here, we … of the SAF from a preferred antiparallel to parallel magnetization configuration at small device sizes, which can …

Coexistence of Superconductivity and Antiferromagnetism in Topological Magnet MnBi2Te4 Films

July 3, 2024
Author(s)
Wei Yuan, Zi-Jie Yan, Hemian Yi, Zihao Wang, Stephen Paolini, Yi-Fan Zhao, Ling-Jie Zhou, Annie G. Wang, Ke Wang, Thomas Prokscha, Zaher Salman, Andreas Suter, Purnima Balakrishnan, Alexander Grutter, Laurel E. Winter, John Singleton, Moses H. Chan, Cui-Zu Chang
… of Superconductivity and Antiferromagnetism in Topological Magnet MnBi2Te4 Films …

Core-Shell Magnetic Morphology of Structurally Uniform Magnetite Nanoparticles

May 19, 2010
Author(s)
Kathryn L. Krycka, R. Booth, C. Hogg, Y. Ijiri, Julie A. Borchers, WangChun Chen, Stephanie S. Watson, M. Laver, Thomas R. Gentile, L.R. Dedon, S. Harris, J. J. Rhyne, S. A. Majetich
… magnetic polarized nanoparticles … Core-Shell Magnetic Morphology of Structurally Uniform Magnetite …

Recent Advances in Weyl Semimetal ( MnBi2Se4) and Axion Insulator (MnBi2Te4)

March 25, 2022
Author(s)
Sugata Chowdhury, Kevin Garrity, Francesca Tavazza
Extensive research is currently focused on 2D and 3D magnetic topological insulators (MTIs), as their many novel properties make them excellent candidates for applications in spintronics and quantum computing. Practical MTIs requires a combination of

Quantum Spin Fluctuations in the Spin Liquid State of Tb 2 Ti 2 O^d7&

December 7, 2011
Author(s)
Hiroshi Takatsu, Hiroaki Kadowaki, Taku J. Sato, Yohiikazu Tabata, Jeffrey W. Lynn, Teruo Yamazaki, Kazuyuki Matsuhira
… on a polycrystalline sample of the frustrated pyrochlore magnet Tb 2 Ti 2 O 7 , which does not show any magnetic order … Frustrated Magnet, inelastic neutron scattering, spin liquid, quantum spin flucutations, pyrochlore magnet …

Zero-field current switching of magnetic domains via chiral domain walls

March 16, 2018
Author(s)
Yufan Li, Qinli Ma, Daniel Gopman, Yury Kabanov, Robert D. Shull, C Chien
… (FM) materials, the inherent exchange interaction, magnetic anisotropy, & dipolar forces dictate the domain walls (DWs), Bloch or N´eel, that separate magnetic moments. However, in FM thin films in contact with … as spin-orbit torque (SOT) magnetization switching and magnetic skyrmion formation. Here we show evidence that by …

Miniature atomic magnetometer integrated with flux concentrators

January 14, 2009
Author(s)
William C. Griffith, Ricardo Jimenez Martinez, Vishal Shah, Svenja A. Knappe, John E. Kitching
A major limitation on the sensitivity of alkali atomic magnetometers, spin-exchange relaxation, can be completely eliminated by operating at low magnetic field and high alkali density. This allows the miniaturization of atomic magnetometers while retaining

Carbon: A Bane for Giant Magnetoresistance Magnetic Multilayers

April 1, 2002
Author(s)
D X. Yang, H D. Chopra, B Shashishekar, P J. Chen, William F. Egelhoff Jr.
… role of small amount of carbon on the structure and magnetic properties of giant magnetoresistance … and associated degradation of structure-sensitive magnetic properties. In addition, carbon promotes the … Carbon: A Bane for Giant Magnetoresistance Magnetic Multilayers …

Phase Competition in the Palmer-Chalker XY Pyrochlore Er 2 Pt 2 O 7

October 30, 2017
Author(s)
A. M. Hallas, J. Gaudet, Nicholas Butch, Guangyong Xu, M. Tachibana, C. R. Wiebe, Graeme M. Luke, Bruce D. Gaulin
We report neutron scattering measurements on Er 2Pt 2O 7, a new addition to the XY family of frustrated pyrochlore magnets. Symmetry analysis of our elastic scattering data shows that Er 2Pt 2Od7^ is the first XY pyrochlore to order into the κ = 0,Γ 7

Magnetic Field Frustration of the Metal-Insulator Transition in V 2 O 3

June 1, 2020
Author(s)
J. Trastoy, A. Camjayi, J. del Valle, Y. Kalcheim, J.-P. Crocombette, Dustin A. Gilbert, Julie Borchers, J. E. Villegas, D. Ravelosona, M. J. Rozenberg, Ivan K. Schuller
… , which undergoes simultaneous electronic, structural and magnetic phase transitions. This remarkable feature … play in this material. In this work, acting solely on the magnetic degree of freedom, we reveal an anomalous feature in … at the transition. The effects are attributed to the magnetic field quenching antiferromagnetic fluctuations above …

Magnetic Microstructure of Amorphous Alloys Studied Using Scanning Electron Microscopy with Polarization Analysis

January 1, 1987
Author(s)
John Unguris, G Hembree, Robert Celotta, Daniel T. Pierce, C Aroca
… analysis (SEMPA) has made the direct measurement of magnetic structures with submicron spatial resolution … simultaneously, however, permitting comparisons between magnetic and structural properties. In addition the use of … magnetization within domain walls and to study changes in magnetic microstructure due to Ar ion bombardment and …

Manipulation of meniscus rise for in situ multiphase nuclear magnetic resonance spectroscopy

April 8, 2025
Author(s)
Veruska Malave, Newell Moser, Edward Garboczi, Mark McLinden, Jason Widegren, Christopher Suiter
… Our earlier work demonstrated that nuclear magnetic resonance (NMR) spectroscopy is a viable technique … Nuclear magnetic resonance (NMR), multiphase flows, surface tension, … of meniscus rise for in situ multiphase nuclear magnetic resonance spectroscopy …

First-Order Reversal Curves of the Magnetostructural Transition in FeTe

June 5, 2017
Author(s)
M. K. Frampton, J. Crocker, Dustin A. Gilbert, N. Curro, Kai Liu, J. A. Schneeloch, G. D. Gu, R. J. Zieve
We apply the first-order reversal curve (FORC) method, borrowed from studies of ferromagnetic materials, to the magneto-structural phase transition of Fe 1+yTe. FORC measurements reveal two features in the hysteretic phase transition, even in samples where

Scanning localized magnetic fields in microfluidic device using single spin in nanodiamond

February 5, 2015
Author(s)
Jacob M. Taylor, K. Lim, Chad Ropp, Benjamin Shapiro, Edo Waks
… in a microfluidic device. Our approach can manipulate magnetic objects in three dimensions within a liquid environment and also orients their magnetic dipole. A diamond nanocrystal is integrated into the microfluidic device and serves as a local magnetic field probe. We vary the position of a magnetic …

Waveguide coupling via magnetic gratings with effective strips

April 14, 2018
Author(s)
Kevin Roccapriore, David Lyvers, Dean Brown, Ekaterina Poutrina, Augustine Urbas, Thomas Germer, Vladimir Drachev
… gratings, magnetic, metamaterials, waveguide … Waveguide coupling via magnetic gratings with effective strips …

High Temperature Magnetic Ordering in the 4d Perovskite SrTcO 3

February 7, 2011
Author(s)
Efrain E. Rodriguez, Frederic Poineau, Anna Llobet, Brendan J. Kennedy, Maxim Avdeev, Gordon J. Thorogood, Melody L. Carter, Ram Seshadri, David J. Singh, Anthony K. Cheetham
… High Temperature Magnetic Ordering in the 4d Perovskite SrTcO 3 …

THE NIST MAGNETIC SUSPENSION MASS COMPARATOR: A LOOK AT AUTOMATION

September 29, 2016
Author(s)
Corey A. Stambaugh, Edward C. Mulhern
… The magnetic suspension mass comparator at NIST is a fully … pan located in air to a mass comparator in vacuum using magnetic suspension. The fully automated system is able to … THE NIST MAGNETIC SUSPENSION MASS COMPARATOR: A LOOK AT AUTOMATION …

Spintronics: Chiral damping

February 24, 2016
Author(s)
Kyoung-Whan Kim, Hyun-Woo Lee
Many objects in nature prefer to spiral in one particular direction to the other. A nanostructured magnetic system with strong spin-orbit coupling now shows that the energy loss is also chiral.
Displaying 826 - 850 of 3361
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