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Search Publications

NIST Authors in Bold

Displaying 1101 - 1125 of 3361

High Q resonating cantilevers for in situ measurements of ferromagnetic films

August 24, 2001
Author(s)
John M. Moreland, T. J. Hubbard
We describe micro cantilevers developed for in-situ measurements of ultra-thin ferromagnetic films. The cantilevers are optimized for use in a resonating torque micro-balance magnetometer that measures the magnetic moment of thin films as they are being

A Novel Low Loss and Lightweight Magnetic Material for Electrical Machinery

February 10, 2020
Author(s)
Michael J. Donahue, Farzad Ahmadi, Yilmaz Sozer, Igor Tsukerman
… machinery, is made of highly packed and insulated magnetic microwires (MWs). These MWs are aligned in such a … diameter and a 33 µm insulation coating are utilized. The magnetic measurements of the fabricated sample demonstrate … A Novel Low Loss and Lightweight Magnetic Material for Electrical Machinery …

Mixed-Surfactants as a Novel Approach to Atomic Engineering of Spin Valves

October 12, 2021
Author(s)
D X. Yang, H D. Chopra, P J. Chen, William F. Egelhoff Jr.
Previously, surfactants in ultra-high vacuum have been used to obtain smooth interfaces in giant magnetoresistance effect (GMR) spin valves for an enhanced GMR. In the present study, a novel extension to the surfactant approach has been developed, called

Quantum Spin Ice Response to a Magnetic Field in the Dipole-Octupole Pyrochlore Ce2Zr2O7

August 28, 2023
Author(s)
E. Smith, J. Dudemaine, B. Placke, R. Schafer, D. Yahne, T. DeLazzer, A. Fitterman, J. Beare, Jonathan N. Gaudet, C.R.C. Buhariwalla, Andrey Podlesnyak, Guangyong Xu, J. Clancy, R. Movshovich, G. Luke, K. Ross, R. Moessner, O. Benton, A. Bianchi, B. Gaulin
… single crystal samples of Ce2Zr2O7 down to T ∼ 0.1 K in a magnetic field along the [1,¯1, 0] direction. These … and is split into two separate humps by the [1,¯1, 0] magnetic field at ∼2 T. These separate features are due to … on single crystal Ce2Zr2O7 in [1,¯1, 0] and [0, 0, 1] magnetic fields at temperatures down to T = 0.03 K. The …

Elucidating Proximity Magnetism through Polarized Neutron Reflectometry and Machine Learning

September 16, 2021
Author(s)
Nina Andrejevic, Zhantao Chen, Thanh Nguyen, Leon Fan, Henry Heiberger, Valeria Lauter, Ling-Jie Zhou, Yi-Fan Zhao, Cui-Zu Chang, Alexander Grutter, Mingda Li
… heterostructure Bi 2 Se 3 /EuS exhibiting proximity magnetism, in good agreement with the results of conventional … Te^3/Cr 2 O 3 and identify possible interfacial proximity magnetism in this material. We anticipate the framework … Elucidating Proximity Magnetism through Polarized Neutron Reflectometry and Machine …

Design of remnant magnetization FeCoV films as compact, heatless neutron spin rotators

April 5, 2013
Author(s)
Michael G. Huber, M. O. Abutaleb, Dimitry A. Pushin, Charles F. Majkrzak, Muhammad Arif, D G. Cory
… constraints. These passive devices employ remnant magnetization Fe- CoV thin films and can be tuned … μm and 5.3 μm to characterize the depth-dependent vector magnetization in the films. Results for a prototype set of … Design of remnant magnetization FeCoV films as compact, heatless neutron spin …

Zeeman-resolved Autler-Townes splitting in Rydberg atoms with a tunable RF resonance and a single transition dipole moment

February 21, 2024
Author(s)
Noah Schlossberger, Drew Rotunno, Aly Artusio-Glimpse, Nik Prajapati, Samuel Berweger, Dangka Shylla, Matt Simons, Christopher L. Holloway
Applying a magnetic field as a method for tuning the frequency of Autler-Townes splitting for Rydberg electrometry has recently been demonstrated. In this Letter, we provide a theoretical understanding of Rydberg electromechanically-induced-transparency

Direct Imaging of Current Driven Domain Walls in Ferromagnetic Nanostripes

May 21, 2009
Author(s)
Willard C. Uhlig, Michael J. Donahue, Daniel T. Pierce, John Unguris
To better understand the response of domain walls to current induced spin transfer torques, we have directly imaged the internal magnetic structure of domain walls in current-carrying ferromagnetic nanostripes. Domain wall images were acquired both while a

Synthesis and Size Dependence of Strongly Interacting Ferrite Nano-Objects: Implications for Magnetic Particle Imaging and Spatially Resolved Thermometry

September 25, 2024
Author(s)
Frank Abel, Eduardo De Lima Correa, Thinh Bui, Adam Biacchi, Michael J. Donahue, Mia Merritt, Jonathan Seppala, Solomon I. Woods, Angela Hight Walker, Cindi Dennis
… recently shown to exhibit enhanced spatial resolution in magnetic particle imaging (MPI). Here, we develop a simple … one-pot thermal decomposition approach to produce ferrite magnetic nano-objects (MNOs) which strongly interact … MNOs were magnetically characterized by magnetometry and magnetic particle spectroscopy (MPS) to study their …

Magnetization Reversal Mechanisms in Heusler Alloy Spin Valves

March 29, 2011
Author(s)
T. P. Ginley, Julie Borchers, Brian Kirby, Cindi L. Dennis, Matthew J. Carey, J. R. Childress
… scattering. Fits to the data revealed that the free layer magnetization is canted relative to the field, and the orientation of the magnetization changes as the field is varied. The free layer … Magnetization Reversal Mechanisms in Heusler Alloy Spin Valves …

Termination Switching of Antiferromagnetic Proximity Effect in Topological Insulator

August 12, 2020
Author(s)
Chao-Yao Yang, Lei Pan, Alexander Grutter, Haiying Wang, Xiaoyu Che, Qing L. He, Yingying Wu, Dustin A. Gilbert, Padraic Shafer, Elke Arenholz, Hao Wu, Gen Yin, Peng Deng, Julie Borchers, William D. Ratcliff, Kang L. Wang
The magnetic proximity effect (MPE) allows exchange-coupling of topological insulators (TIs) with magnetically ordered materials to break time-reversal-symmetry and open a gap in the Dirac-cone surface state, with the goal of realizing quantum anomalous

Programmable electrical coupling between stochastic magnetic tunnel junctions

March 29, 2024
Author(s)
Sidra Gibeault, Temitayo Adeyeye, Liam Pocher, Daniel Lathrop, Matthew Daniels, Mark Stiles, Jabez J. McClelland, William Borders, Jason Ryan, Philippe Talatchian, Ursula Ebels, Advait Madhavan
… magnetic tunnel junction, superparamagnetic, p-bit, telegraph … Programmable electrical coupling between stochastic magnetic tunnel junctions …

Trapped-Ion Quantum Logic Gates Based on Oscillating Magnetic Fields

August 29, 2008
Author(s)
Christian Ospelkaus, Christopher Langer, Jason Amini, Kenton R. Brown, Dietrich G. Leibfried, David J. Wineland
… Oscillating magnetic fields and field gradients can be used to implement … between the ion crystal and the electrode surface. Magnetic-field-mediated gates have the potential to … Trapped-Ion Quantum Logic Gates Based on Oscillating Magnetic Fields …

The Design of the NEW NIST-4 Watt Balance

August 24, 2014
Author(s)
Leon S. Chao, Stephan Schlamminger, Frank C. Seifert, Yusi A. Cao, Darine El Haddad, David B. Newell, Jon R. Pratt
… The design of the new permanent-magnet driven watt balance and novel mechanical features will … mass, watt balance, kilogram, flexure, permanent magnet …

All-optical spin transfer between elemental sublattices in half-metallic Co2MnGe Heusler compound within the femtosecond laser excitation pulse

January 17, 2020
Author(s)
Phoebe Tengdin, Christian Gentry, Adam Blonsky, Dmitriy Zusin, Michael Gerrity, Lukas Hellbruck, Moritz Hofherr, Justin Shaw, Yaroslav Kvashnin, Erna K. Delczeg-Czirjak, Monika Arora, Hans Nembach, Thomas J. Silva, Stefan Mathias, Martin Aeschliman, Henry C. Kapteyn, Danny Thonig, Konstantinos Koumpouras, Olle Eriksson, Margaret M. Murnane
Heusler compounds are exciting materials for future spintronics applications because they display a wide range of tunable electronic and magnetic interactions. Here, we use a femtosecond laser to directly transfer spin polarization from one element to

Effects of magnetism and electric field on the energy gap of bilayer graphene nanoflakes

January 13, 2010
Author(s)
Hongki Min
… We study the effect of magnetism and perpendicular external electric field strengths … electric field between the layers shows opposite behavior. Magnetism between the layers plays a major role in enhancing … the geometrical confinement hinting at an interplay of magnetism and geometrical confinement in finite size bilayer …

Thermal Longevity of Nano-Multilayer Magnetic Media

January 21, 2002
Author(s)
Edward Della Torre, Lawrence H. Bennett
… coercivity, nano-multilayer magnetic media, Preisach-Arrhenius model, thermal longevity … Thermal Longevity of Nano-Multilayer Magnetic Media …

Two Simple Tests for Models of Current-Induced Magnetization Switching

January 1, 2007
Author(s)
N Theodoropoulou, Abhishek Sharma, W Pratt, Mark D. Stiles, J Xiao, J Bass
… We describe two simple tests for models of current-induced magnetization switching due to spin-transfer-torque in … Two Simple Tests for Models of Current-Induced Magnetization Switching …

Measuring the effects of low energy ion milling on the magnetization of Co/Pd multilayers using scanning electron microscopy with polarization analysis

April 30, 2010
Author(s)
Benjamin James McMorran, Aaron C. Cochran, Randy K. Dumas, Kai Liu, Paul Morrow, Daniel T. Pierce, John Unguris
… (SEMPA). The effect of Ar ion milling on the Co/Pd magnetization angle distribution is compared for ion milling … milling causes a measureable change in the out-of-plane magnetization angle distribution as material is removed, but … with 50 eV Ar ions does not significantly alter the magnetization distribution. This enables quantitative imaging …
Displaying 1101 - 1125 of 3361
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