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Search Publications

NIST Authors in Bold

Displaying 51 - 75 of 3359

Manipulation and sorting of magnetic particles by a magnetic force microscope on a microfluidic magnetic trap platform

July 1, 2005
Author(s)
Elizabeth Mirowski, John M. Moreland, Arthur Zhang, Stephen E. Russek, Michael J. Donahue
… We have integrated a microfluidic magnetic trap platform with an external magnetic force microscope (MFM) cantilever. The MFM … as a magnetorobotic arm that provides a translatable local magnetic field gradient to capture and move magnetic … Magnetic Force Microscope, Magnetic Tweezer, Manipulation, …

Imaging of Magnetic Excitations in Nanostructures with Microwave Near-Field Microscopy

November 25, 2021
Author(s)
Samuel Berweger, Robert Tyrrell-Ead, Houchen Chang, Mingzhong Wu, Hong Tang, Hans Nembach, Karl Stupic, Stephen E. Russek, Thomas Mitchell (Mitch) Wallis, Pavel Kabos
… spatial resolution as high as 50 nm. Visualization of magnetic excitations is an enticing prospect for high-speed, high-density magnetic logic and storage applications, which has spurred the development of new magnetic microscopy and imaging techniques in recent years. …

Field-Tuned Magnetic Structure and Phase Diagram of the Honeycomb Magnet YbCl 3

March 1, 2021
Author(s)
Yiqing Hao, Hongliang Wo, Yimeng Gu, Xiaowen Zhang, YiQing Gu, ShiYi Zheng, Yang Zhao, Guangyong Xu, Jeffrey W. Lynn, Naoki Murai, Wenbin Wang, Jun Zhao
… thermodynamic and neutron diffraction measurements on the magnetic ordering properties of the honeycomb lattice magnet YbCl 3 . We find YbCl 3 exhibits a Neel type long-range magnetic order at the wavevector (0,0,0) below T N = 600 mK. … quantum magnet, neutron scattering, honeycomb magnet …

Observation of the Effects of Tip Magnetization States on Magnetic Force Microscopy Images

April 15, 1999
Author(s)
Paul Rice, Stephen E. Russek
… the tip and the tip-magnetizing field on the subsequent magnetic force microscopy images. … magnetic force microscopy, magnetic imaging, magnetic imaging reference sample, remanent tip magnetization … Observation of the Effects of Tip Magnetization States on Magnetic Force Microscopy Images …

Prototype Phantoms for Characterization of Ultra-Low Field Magnetic Resonance Imaging

November 26, 2013
Author(s)
Michael A. Boss, John A. Mates, Sarah E. Busch, Paul SanGiorgio, Stephen E. Russek, Kai Buckenmaier, Kent D. Irwin, Hsiao-Mei Cho, Gene C. Hilton, John Clarke
… for the purpose of calibrating ultralow field magnetic resonance imaging (ULF MRI) systems. The phantoms … The phantoms were characterized first with conventional magnetic resonance scanners at 1.5 and 3 T, and subsequently … Magnetic Resonance in Medicine … ultralow field, ultralow field magnetic resonance imaging, phantom, T1, proton density, …

Dynamics of Magnetic Nanoparticles and Nanodevices

May 31, 2015
Author(s)
Stephen E. Russek, Eric R. Evarts, Robert J. Usselman
… Nanoscale magnetic devices and particles are being developed for a wide variety of applications including magnetic memory, nanoscale sensors, magnetic resonance imaging (MRI) agents, and therapeutic … Magnetic devices, magnetic random access memory, magnetic nanoparticles, …

The effects of intraparticle and interparticle interactions on the magnetic hysteresis loop of frozen suspensions of magnetic nanoparticles

July 23, 2019
Author(s)
Cindi L. Dennis, Zoe Boekelheide, Jackson Miller, Cordula Gruettner
… We present magnetic hysteresis loop measurements at 11 K on suspensions of magnetic nanoparticles dispersed in H2O which have been frozen in a range of applied magnetic fields. These particles exhibit significant … magnetic nanoparticle, magnetic interactions, chains …

Features of Domain Nucleation and Growth in Co/Ru/Co Synthetic Antiferromagnets Deposited on Obliquely Sputtered Ta Underlayers

February 1, 2002
Author(s)
Alexander J. Shapiro, V S. Gornakov, Valerian I. Nikitenko, Robert D. McMichael, William F. Egelhoff Jr., Y W. Tahk, Robert D. Shull, L Gan
Obliquely sputtered Ta underlayers were used to stabilize antiferromagnetically couple Co/Ru/Co/Ta structures with a strong uniaxial anistropy. Magneto-optical indicator film (MOIF) imaging revealed nucleation and growth of domains during remagnetization

Ultrafast element-specific magnetization dynamics of complex magnetic materials on a table-top

December 21, 2012
Author(s)
Justin M. Shaw, Stefan Mathias, Chan La-O=Vorakiat, Emrah Turgut, Patrik Grychtol, Roman Adam, Dennis Rudolf, Hans T. Nembach, Martin Aeschlimann, Claus Schneider, Henry Kapteyn, Margaret Murnane
… We review recent progress in femtosecond magnetization dynamics probed by extreme ultraviolet pulses … capability – on a table-top - for the measurement of magnetization dynamics in complex multi-sublattice magnets and multilayer magnetic structures. We show that this newly introduced …

A Perspective on Nonvolatile Magnetic Memory Technology

December 21, 2016
Author(s)
Ronald B. Goldfarb
… Magnetic random-access memory (MRAM) is characterized by … Introduction to Magnetic Random-Access Memory … Computer memory, magnetic random-access memory, spin electronics, spintronics, … A Perspective on Nonvolatile Magnetic Memory Technology …

Energy Levels of 4f3 in the Free Nd3+ Ion From Emission Spectra

February 1, 2006
Author(s)
J-F Wyart, Ali Meftah, Annik Bachelier, Jocelyne Sinzelle, Wan-U Lydia Tchang-Brillet, Norbert Champion, Nissan Spector, J Sugar
… The emission spectrum of neodymium produced by vacuum spark sources was observed in … emission spectrum, energy levels, free-ion, neodymium, parametric fits, triply-ionized, wavelengths …

Microwave generation in magnetic multilayers and nanostructures

September 1, 2007
Author(s)
William Rippard, Matthew Pufall
… We present an overview of the coherent magnetic precessional dynamics induced by the spin transfer effect in magnetic nanostructures. The precessional frequencies of the magnetic oscillators can be tuned over a range of several … Handbook of Magnetism and Advanced Magnetic Materials …

Soft magnetic layers for low-field-detection magnetic sensors

May 18, 2006
Author(s)
William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Freemon Johnson, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell
… We have investigated a wide variety of soft magnetic layers as sense layers for magnetic-field sensors. We find that in thin-film form, some … highest ? values occur in trilayer structures with a non-magnetic film separating two soft magnetic films. The alloy …

Zigzag-shaped magnetic sensors

December 13, 2004
Author(s)
Fabio C. da Silva, Willard C. Uhlig, Anthony B. Kos, Susan A. Schima, Joe Aumentado, John Unguris, David P. Pappas
… simple and unique geometry can be used as a single-axis magnetic field sensor. In this configuration, the sensors are … magnetic sensors, magnetoresistance, nanoscale magnetism … Zigzag-shaped magnetic sensors …

Zigzag Shaped Magnetic Sensors

January 1, 2004
Author(s)
S da, Willard C. Uhlig, A Kos, Joe Aumentado, Michael J. Donahue, John Unguris, David P. Pappas
… and unique geometry can be used as a naturalo form a magnetic field sensor. In this configuration the sensors are … magnetic sensors, magnetoresistance, nanoscale magnetism … Zigzag Shaped Magnetic Sensors …

Development of Ultra-Low Magnetic Field Sensors With Magnetic Tunnel Junctions

October 31, 2007
Author(s)
Philip Pong, John E. Bonevich, William F. Egelhoff Jr.
… 10% to over 400% at room temperature. A combination of magnetic tunnel junctions with high magnetoresistance ratio and soft magnetic layers enables the development of ultra-low magnetic field sensor with sensitivity down to the scale of … magnetic field sensor, magnetic tunnel junction, …

Resonating torque microbalance for in situ measurements of ferromagnetic films

January 1, 2002
Author(s)
John M. Moreland, James A. Beall, Stephen E. Russek
We describe an instrument for in situ monitoring of the magnetic moment of a thin film during deposition with sub-monolayer sensitivity. The instrument measures the magnetic torque on a film as it is being deposited onto a microcantilever excited near its

Nd Ordering, Cluster Formation, and the Origin of Negative Magnetization in NdMn 0l8 Fe 0.2 O 3=d

March 1, 2020
Author(s)
D. M. Pajerowski, Jr. C. A. Escanhoela, D. Haskel, Timothy R Prisk, M. D. Frontzek, D. Phelan, Jr. Mihalik, M. Mihalik
… pseudo-perovskite series NdMn 1-x Fe x O 3+δ has negative magnetization, i.e. magnetization directed opposite to an applied field under … findings help to explain the previously observed negative magnetization in this material as due to a magnetic domain … Nd Ordering, Cluster Formation, and the Origin of Negative Magnetization in NdMn 0l8 Fe 0.2 O 3=d …

Analysis of Switching in Uniformly Magnetized Bodies

September 1, 2002
Author(s)
Michael J. Donahue, Donald G. Porter
… A full analysis of magnetization reversal of a uniformly magnetized particle by coherent rotation is presented.The … Analysis of Switching in Uniformly Magnetized Bodies …

Magnetic Noise in a Low-Power Picotesla Magnetoresistive Sensor

October 25, 2009
Author(s)
Stephen E. Russek, Lu Yuan, Sean Halloran, Fabio C. da Silva, David P. Pappas, John M. Moreland, Sy-hwang Liou, Rui Zhang
… are(1) decreasing the noise by the use of a 64 element magnetic tunnel junction (MTJ) bridge,(2) reducing the magnetic noise by annealing the MTJ sensors in high magnetic field and a hydrogen environment, and (3) increasing … magnetic sensor, magnetic tunneling junction, magnetic …

Component-Resolved Determination of the Magnetization by Magnetization-Induced Optical Second Harmonic Generation

March 31, 2006
Author(s)
Thomas Gerrits, Thomas J. Silva, Hugo A. van den Berg, Theo Rasing
… for simultaneous measuring the two normalized in-plane magnetization components in magnetic thin films that allows for the reconstruction of the magnetization angle and the normalized value of the magnetization with subnanosecond temporal resolution. The … coherent precession, magnetization reversal, MSHG, vector resolved magnetization …
Displaying 51 - 75 of 3359
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