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Search Publications

NIST Authors in Bold

Displaying 576 - 600 of 3361

Exchange Anisotropy in NiFe Films on (100) NiO Single-Crystal Substrate

July 1, 2001
Author(s)
S M. Rezende, M A. Lucena, A Azevedo, A B. Oliveria, F M. de Aguiar, William F. Egelhoff Jr.
The exchange anisotropy in a Ni81Fe19 film sputtered on a (100) NiO single-crystal substrate is investigated with MOKE magnetometry, ferromagnetic resonance (FMR) and Brillouin light scattering (BLS). The dependencies of the spin-wave frequency and FMR

Measuring the Neutron Lifetime Using Magnetically Trapped Neutrons

May 1, 2014
Author(s)
Hans P. Mumm, Alan Keith Thompson, Paul R. Huffman, Christopher O'Shaughnessy, Kevin J. Coakley, Robert Golub, John M. Doyle, Steve K. Lamoreaux, P.-N. Seo, C E. Mattoni, S N. Dzhosyuk, L Yang, Grace L. Yang, Karl W. Schelhammer, Christopher M. Swank
… Measuring the Neutron Lifetime Using Magnetically Trapped Neutrons …

Investigating the Influence of Sampling Frequency on X-Space MPI Image Reconstructions

March 19, 2023
Author(s)
Mark-Alexander Henn, Klaus Natorf Quelhas, Solomon I. Woods
In this presentation we employ a direct X-space deconvolution to estimate particle distributions from MPI data. We report on how the accuracy of those estimations changes as a function of sampling frequency and compare the findings to the MPI core operator

Capturing Magnetic Bead-based Arrays Using Perpendicular Magnetic Anisotropy

August 20, 2019
Author(s)
Daniel B. Gopman, Yu-Ching Hsiao, Reem Khojah, Xu Li, Auni Kundu, Cai Chen, Andres Chavez, Taehwan Lee, Zhuyun Xiao, Abdon E. Sepulveda, Rob Candler, Gregory P. Carman, Dino Di Carlo, Christopher Lynch
… Designing and implementing means of locally trapping magnetic beads and understanding the factors underlying the … steps toward advancing the capture- release process of magnetic particles for biological applications. In particular, capturing magnetically labeled cells using magnetic microstructures with perpendicular magnetic …

Parallel 3D Temperature Image Reconstruction Using Multi-Color Magnetic Particle Imaging (MPI)

October 18, 2024
Author(s)
Klaus Natorf Quelhas, Mark-Alexander Henn, Ricardo Cordeiro de Farias, Weston L. Tew, Solomon I. Woods
… Magnetic Particle Imaging (MPI) is a novel technique developed for remotely detecting magnetic nanoparticle (MNP) tracers, with great potential for … like MRI or CT), cell tracking, targeted drug delivery and magnetic hyperthermia. More recently, MPI has been studied as …

A Novel Low-Cost High-Throughput Probe Card Scanner Analyzer for Characterization of Magnetic Tunnel Junctions

October 16, 2008
Author(s)
Philip Pong, Moshe Schmoueli, E Marcus, William F. Egelhoff Jr.
… The advancement of the technology of magnetic tunnel junctions (MTJs) greatly hinges on the optimization of the magnetic materials, fabrication process, and annealing … alignment, magnetic tunnel junctions, probe card analyzer, tunneling … Probe Card Scanner Analyzer for Characterization of Magnetic Tunnel Junctions …

Advanced characterization of magnetization dynamics in iron oxide magnetic nanoparticle tracers

January 5, 2022
Author(s)
Thinh Bui, Adam Biacchi, Brianna Bosch Correa, Cindi L. Dennis, Weston L. Tew, Angela R. Hight Walker, Solomon I. Woods
… Characterization of the magnetization dynamics of single-domain magnetic nanoparticles (MNPs) is important for magnetic … Depending on particle size and temperature, nanoparticle magnetization relaxation time constants span from nanoseconds … Advanced characterization of magnetization dynamics in iron oxide magnetic nanoparticle …

Magnetic Method to Characterize the Current Densities in a Breaker Arc

April 1, 2005
Author(s)
Nadia Machkour-Deshayes
… The purpose of this research was to use magnetic induction measurements from a low voltage electric … varying across the propagation direction. We found the magnetic induction of the arc is a convolution product of the … method, electyric conductivity, low voltage breaker arc, magnetic diagnostic …

Observations of Alloying in the Growth of Cr on Fe(001)

January 1, 1997
Author(s)
Angela Davies, Joseph A. Stroscio, Daniel T. Pierce, John Unguris, Robert Celotta
Using scanning tunneling microscopy, we observe the alloying of Cr with an Fe(001) substrate for various coverages at two temperatures. At low Cr coverage, the alloy consists of individual Cr impurities surrounded by Fe. Elemental identification is

Exchange bias and anisotropy in the Fe/KCoF 3 structure

February 1, 2002
Author(s)
Leszek Malkinski, Nicholas Cramer, Andrew Hutchinson, Robert E. Camley, Zbigniew J. Celinski, Danuta Skrzypek, Ronald B. Goldfarb
A new type of ferromagnet/antiferromagnet structure (fe/KCoF 3) was deposited by molecular beam epitaxy. Unidirectional and uniaxial anisotropies of 5.1 and 3.4 kA/m were measured at 23 K using ferromagnetic resonance. Magnetization measurements at 5 K

Signature of magnetic phase separation in the ground state of Pr 1 - x Ca x MnO 3

August 27, 2008
Author(s)
Hao Sha, F Ye, Pengcheng Dai, J. A. Fernandez-Baca, D Mesa, Jeffrey Lynn, Y Tomioka, Y Tokura, Jiandi Zhang
… clusters form. These results provide direct evidence of magnetic phase separation and demonstrate a critical doping … Neutron Diffraction, charge order, magnetic order, phase separation, manganite … Signature of magnetic phase separation in the ground state of Pr 1 - x Ca …

More Diamagnetism Demonstrations

February 1, 2003
Author(s)
Chris Conery, Loren F. Goodrich, Theodore C. Stauffer
The availability of very strong permanent magnets allows observation of phenomena previously difficult to see. The diamagnetism of water and diamagneticly stabilized magnetic levitation are now easy to demonstrate.

Comparison of T1 measurement using ISMRM/NIST system phantom

May 9, 2016
Author(s)
Kathryn E. Keenan, Karl F. Stupic, Michael A. Boss, Stephen E. Russek, Thomas L. Chenevert, Pottumarthi V. Prasad, Wilburn E. Reddick, Jie Zheng, Peng Hu, Edward F. Jackson
We used the ISMRM/NIST system phantom to assess variations of T1 measurements across MRI systems at 1.5 T and 3 T, to determine the repeatability and reproducibility of the T1 measurements. This study demonstrates that T1 variations from NMR-measured value

Structural, Magnetic, and Electronic Evolution of the Spin-Ladder System BaFe 2 S 3-x Se x with Isoelectronic Substitution

June 12, 2020
Author(s)
Jia Yu, Meng Wang, Benjamin A. Frandsen, Hualei Sun, Junjie Yin, Zengjia Liu, Shan Wu, Ming Yi, Zhijun Xu, Arani Acharya, Qingzhen Huang, Edith Bourret-Courchesne, Jeffrey W. Lynn, Robert J. Birgeneau
… phase. The results demonstrate that the crystal structure, magnetic order, and electronic properties are strongly … Structural, Magnetic Phase diagram, neutron diffraction, muon spectroscopy, resistivity, x-ray diffraction, magnetic order … Structural, Magnetic, and Electronic Evolution of the Spin-Ladder System …
Displaying 576 - 600 of 3361
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