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Search Publications

NIST Authors in Bold

Displaying 1126 - 1150 of 3361

Spin Scattering and Noncollinear Spin Structure-Induced Intrinsic Anomalous Hall Effect in Antiferromagnetic Topological Insulator MnBi 2 Te 4

August 19, 2019
Author(s)
Seng Huat Lee, Yanglin Zhu, Yu Wang, Leixin Miao, Timothy Pillsbury, Hemian Yi, Susan Kempinger, Jin Hu, Colin A. Heikes, Patrick Quarterman, William D. Ratcliff, Julie Borchers, Heda Zhang, Xianglin Ke, David Graf, Nasim Alem, Cui-Zu Chang, Nitin Samarth, Zhiqiang Mao
MnBi 2Te 4 has recently been established as an intrinsic antiferromagnetic (AFM) topological insulator - an ideal platform to create quantum anomalous Hall (QAH) insulator and axion insulator states. We performed comprehensive studies on the structure

Non-collinear spin transfer in Co/Cu/Co multilayers

May 15, 2002
Author(s)
Mark D. Stiles, A Zangwill
We report semi-classical calculations of current polarization, spin accumulation, magnetoresistance, and spin transfer torques in Co/Cu/Co multilayers. A 2 x 2 matrix Boltzman equation is used because the Co layer magnetizations are not necessarily

Tuning interfacial Dzyaloshinskii-Moriya interactions in thin amorphous ferrimagnetic alloys

May 4, 2020
Author(s)
Yassine Quessab, Jun-Wen Xu, Chung Ting Ma, W. Zhou, Grant A. Riley, Justin Shaw, Hans Nembach, S. J. Poon, Andrew D. Kent
Skyrmions can be stabilized in magnetic systems with broken inversion symmetry and chiral interactions, such as Dzyaloshinskii-Moriya interactions (DMI). Further, compensation of magnetic moments in ferrimagnetic materials can significantly reduce magnetic

Temperature-dependent structure of Tb-doped magnetite nanoparticles

February 13, 2015
Author(s)
Katherine P. Rice, Stephen E. Russek, Roy H. Geiss, Justin Shaw, Robert J. Usselman, Eric R. Evarts, Thomas J. Silva, Hans Nembach, Elke Arenholz, Yves U. Idzerda
High quality 5 nm cubic Tb-doped magnetite nanoparticles have been synthesized by a modified wet-chemical method to investigate tailoring of magnetic properties for imaging and biomedical applications. We show that the Tb is incorporated into the

Systematic DFT+U and Quantum Monte Carlo Benchmark of Magnetic Two-Dimensional (2D) CrX3 (X = I, Br, Cl, F)

January 9, 2023
Author(s)
Daniel Wines, Kamal Choudhary, Francesca Tavazza
… The search for two-dimensional (2D) magnetic materials has attracted a great deal of attention … to be successful for calculating the electronic and magnetic properties of a wide variety of 2D and bulk systems, … combines DFT+U and DMC in order to treat 2D correlated magnetic systems. We chose monolayer CrX3 (X = I, Br, Cl, F), …

Spectrum and Energy Levels of the Nd 4+ Free Ion (Nd V)

October 12, 2021
Author(s)
Ali Meftah, J-F Wyart, Jocelyne Sinzelle, Wan-U Lydia Tchang-Brillet, Norbert Champion, Nissan Spector, J Sugar
… The spectrum of neodymium excited by a sliding spark source was photographed …

Suppression of Orange-Peel Coupling in Magnetic Tunnel Junctions by Preoxidation

April 17, 2006
Author(s)
William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell
… have found that preoxidation of the bottom Co electrode in magnetic tunnel junctions (MTJs) very effectively suppresses … Suppression of Orange-Peel Coupling in Magnetic Tunnel Junctions by Preoxidation …

Influence of Pt spacer thickness on the domain nucleation in ultrathin Co/Pt/Co trilayers

May 1, 2013
Author(s)
Robert D. Shull, Yury Y. Iunin, Y. P. Kabanov, Valerian I. Nikitenko, O. V. Skryabina, C. L. Chien
The effect of varying the interlayer coupling between two 0.6 nm thick Co layers with perpendicular anisotropy on their magnetic ground state and the domain nucleation processes during a field reversal was studied. A surprising transition from out-of-plane

Room-temperature skyrmions in strain-engineered FeGe thin films

June 8, 2020
Author(s)
Sujan Budhathoki, Arjun Sapkota, Ka M. Law, Smriti Ranjit, Bhuwan Nepal, Brian Hoskins, Arashdeep S. Thind, Albina Y. Borisevich, Michelle E. Jamer, Travis J. Anderson, Andrew D. Koehler, Karl D. Hobart, Gregory M. Stephen, Don Heiman, Tim Mewes, Rohan Mishra, James C. Gallagher, Adam J. Hauser
Skyrmion electronics hold great promise for low energy consumption and stable high information density, and stabilization of Skyrmion lattice (SkX) phase at or above room temperature is greatly desired for practical use. Topological Hall Effect can be used

Nanoscale Ferroelastic Twins Formed in Strained LaCoO 3 Films

March 29, 2019
Author(s)
Er-Jia Guo, Ryan Desautels, David Keavney, Manuel A. Roldan, Brian Kirby, Dongkyu Lee, Zhaoliang Liao, Timothy Charlton, Andreas Herklotz, T. Zac Ward, Michael R. Fitzsimmons, Ho Nyung Lee
The formation of twinning domains has been established as a major mechanism to accommodate epitaxial strain in rhombohedral ferroelastic oxide thin films. The elastic energy can be released at the expense of high interfacial energy at the domain boundaries

Spin-orbital order and excitons in magnetoresistive HoBi

March 22, 2023
Author(s)
Jonathan N. Gaudet, H. Yang, E. Smith, T. Halloran, J. Clancy, Jose Rodriguez Rivera, Guangyong Xu, Yang Zhao, Wangchun Chen, G. Sala, Adam A. Aczel, B. Gaulin, Fazel Tafti, Collin L. Broholm
The magnetism of the rock-salt fcc rare-earth monopnictide HoBi, a candidate topological material with extreme magnetoresistance, is investigated. From the Ho3+ non-Kramers J=8 spin-orbital multiplet, the cubic crystal electric field yields six near

Close Correlation between Magnetic Properties and the Soft Phonon Mode of the Structural Transition in BaFe 2 A s 2 and SrFe 2 As 2

April 27, 2015
Author(s)
Daniel E Parshall, L. Pintschovius, J. L. Niedziela, J.-P. Castellan, D. Lamago, R. Mittal, Th. Wolf, D. Reznik
… tracking the increase of the size of slowly fluctuation magnetic domains. On cooling below the transition to base … the phonons harden, following the square of the magnetic moment (which we find is proportional to the … Our results provide evidence for close correlation between magnetic and phonon properties in Fe-based superconductors. …

Simultaneous Control of the Dzyaloshinskii-Moriya Interaction and Magnetic Anisotropy in Nanomagnetic Trilayers

August 17, 2017
Author(s)
Andrew L. Balk, Kyoung-Whan Kim, Daniel T. Pierce, Mark D. Stiles, John Unguris, Samuel Stavis
… Kerr effect (MOKE) microscopy measurements of magnetic bubble domains demonstrate that Ar+ irradiation … changes the DMI sign and magnitude separately from the magnetic anisotropy, allowing tuning of the DMI while holding … Control of the Dzyaloshinskii-Moriya Interaction and Magnetic Anisotropy in Nanomagnetic Trilayers …

Toward Ultra-fast and Ultra-low Power Switching in Perpendicular Magnetic Tunnel Junctions

March 17, 2020
Author(s)
Daniel B. Gopman, Jian-Ping Wang, Tony Low, Weigang Wang, William Taylor
… Magnetic random access memory (MRAM) based on perpendicular magnetic tunnel junctions (pMTJs) is one of the core building … demonstrated. Based on interfacial- and bulk perpendicular magnetic anisotropy materials, we demonstrate two novel … Ultra-fast and Ultra-low Power Switching in Perpendicular Magnetic Tunnel Junctions …

Topological RPdBi Half-Heusler Semimetals: a New Family of Non-Centrosymmetric Magnetic SuperconductorS

June 5, 2015
Author(s)
Yasuyuki Nakajima, Rongwei Hu, Kevin Kirshenbaum, Alex Hughes, Paul Syers, Xiangfeng Wang, Kenfeng Wang, Renxiong Wang, Shanta R. Saha, Daniel K. Pratt, Jeffrey W. Lynn, Johnpierre Paglione
… via lanthanide contraction, as well as the strength of magnetic interaction via de Gennes scaling, allowing for a … Semimetals: a New Family of Non-Centrosymmetric Magnetic SuperconductorS …

High-throughput search for magnetic topological materials using spin-orbit spillage, machine-learning and experiments

April 16, 2021
Author(s)
Kamal Choudhary, Kevin Garrity, Francesca Tavazza, Nirmal Ghimire, Naween Anand
… Magnetic topological insulators and semi-metals have a … high-throughput density functional theory to identify magnetic topological materials out of ≈ 40000 … First, we screen materials with net magnetic moment > 0.5 μB and spin-orbit spillage > 0.25 … learning model for predicting spillage, bandgap and magnetic moment to further accelerate the screening process. …

Domain Wall Traps for Low-Field Switching of Submicron Elements

May 1, 2000
Author(s)
Robert D. McMichael, J G. Eicke, Michael J. Donahue, Donald G. Porter
In magnetic random access memory, power consumption depends on the coercivity of the magnetic elements in the memory cells. In this article a new method is described that uses a domain wall trap element shape to reduce both the coercivity and the
Displaying 1126 - 1150 of 3361
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