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NIST Authors in Bold

Displaying 2401 - 2425 of 3361

Ultra-Low-Field NMR Relaxation and Diffusion Measurements Using an Optical Magnetometer

July 31, 2014
Author(s)
John E. Kitching, P. Ganssle, H Shin, Scott J. Seltzer, Vikram S. Bajaj, Micah P. Ledbetter, Dimitry Budkerl, Svenja A. Knappe, A Pines
In this work, we have demonstrated for the first time that an alkali vapor cell magnetometer has sufficient sensitivity to chemically resolve a heterogeneous mixture of oil and water by its relaxation and diffusion properties, both in one dimensional

Investigation of Gd3N@C2n family by Raman and inelastic electron tunneling spectroscopy

March 15, 2010
Author(s)
James G. Kushmerick, Brian G. Burke, Tsz-Wah Chan, Keith A. Williams, Jiechao Ge, Chunying Shu, Wujun Fu, Harry C. Dorn, Alexander Puretzky, David B. Geohegan
The structure and vibrational spectrum of Gd3N@C80 is studied through Raman and inelastic electron tunneling spectroscopy (IETS) as well as density functional theory (DFT) and universal force field (UFF) calculations. Hindered rotations, shown by both

Spin Correlations in the Geometrically Frustrated Pyrochlore Tb 2 Mo 2 O 7

December 31, 2008
Author(s)
D. K. Singh, J. S. Helton, S. Chu, T. Han, C. Bonnoit, Sung Chang, Hye J. Kang, Jeffrey W. Lynn, Y. S. Lee
We report neutron scattering studies of the spin correlations of the geometrically frustrated py- rochlore Tb 2Mo 2O 7using single crystal samples. Elastic diffuse peaks are observed at low temperatures, indicating short-range ordering of the Tb 3+ moments

Metallurgy: 1998 Programs and Accomplishments

January 1, 1999
Author(s)
C A. Handwerker, Robert J. Schaefer
The activities of the NIST Metallurgy Division during FY 1998 are described. The Division's activities are organized into four major programs and two smaller ones, and highlights from each program are presented. The report includes descriptions of the

The Bose-Einstein condensate

January 1, 1998
Author(s)
Eric A. Cornell, C E. Wieman
In June 1995, our research group at the Joint Institute for Laboratory Astrophysics in Bolder, Colorado, succeeded in creating a miniscule but marvelous droplet. By cooling 2,000 rubidium atoms to a temperature less than 100 billionths of a degree above

The creation and study of Bose-Einstein condensation in a cold alkali vapor

September 1, 1997
Author(s)
C E. Wieman, Eric A. Cornell, Deborah S. Jin, J R. Ensher
Bose-Einstein condensation in a gas resulted form the combination of research in laser cooling and trapping, the study of spin polarized hydrogen, and the investigation of atomic collisions at very low temperatures. After discussing how these advances led

Microfabricated Atomic Magnetometers

April 15, 2013
Author(s)
Svenja A. Knappe, John E. Kitching
In this chapter, we discuss miniaturized atomic magnetometers, and the technology and applications relevant to this somewhat unusual direction in magnetometer research and development. By “miniaturized”, we mean, in addition to their size, magnetometers

Giant Magnetoresistive Spin-Valve Transpinnor

October 12, 2021
Author(s)
S Bae, S Zurn, William F. Egelhoff Jr., P J. Chen, L Sheppard, E J. Torok, J H. Judy
A giant magnetoresistive (GMR) spin-valve Transpinnor, a new kind of active solid-state magneto-electronic device or spin-transistor, has been fabricated and investigated for the first time using anti-ferromagnetic oxide exchange biased bottom GMR spin

Topological surface states of MnBi2Te4 at finite temperatures and at domain walls

February 24, 2021
Author(s)
Kevin F. Garrity, Sugata Chowdhury, Francesca Tavazza
MnBi2Te4 has recently been the subject of intensive study, due to the prediction of axion insulator, Weyl semimetal, and quantum anomalous Hall insulator phases, depending on the structure and magnetic ordering. Experimental results have con firmed some

Elusive Valence Transition in Mixed-Valence Sesquioxide Cs 4 O 6

November 4, 2019
Author(s)
Ross H. Colman, H. Esma Okur, Winfried Kockelmann, Craig Brown, Annette Sans, Claudia Felser, Martin Jansen, Kosmas Prassides
Cs 4O 6 is a mixed valence molecular oxide with a cubic structure, comprising valency-delocalized O 2 4/3- units and with properties highly sensitive to cooling protocols. Here we use neutron powder diffraction to authenticate that, while upon deep

Metastable Layered Cobalt Chalcogenides from Topochemical Deintercalation

November 29, 2016
Author(s)
Xiuquan Zhou, Brandon Wilfong, Hector Vivanco, Johnpierre Paglione, Craig Brown, Efrain E. Rodriguez
We present a general strategy to synthesize metastable layered materials via topochemical de-intercalation of thermodynamically stable to phases.Through kinetic control of the de-intercalation reaction, we have prepared two hypothesized metastable

Tunable Cobalt Vacancies and Related Properties in LaCo x As 2

October 21, 2014
Author(s)
Shijie Shen, Gang Wang, Shifeng Jin, Qingzhen Huang, Tianping Ying, Dandan Li, Xiaofang Lai, Tingting Zhou, Han Zhang, Zhiping Lin, Xiaozhi Wu, Xiaolong Chen
The origin of transition metal vacancies and their effects on the properties of ThCr 2Si 2-type compounds have been less studied and poorly understood. Here we carefully investigate the structure, physical properties, and electronic structure for a series

Adjustable Zero Thermal Expansion in Antiperovskite Manganese Nitride

October 25, 2011
Author(s)
Xiaoyan Song, Zhonghua Sun, Qingzhen Huang, Markus Rettenmayr, Xuemei Liu, Martin Seyring, Guannan Li, Guanghui Rao, Fuxing Yin
The zero thermal expansion (ZTE) behavior particularly with a wide operating temperature range in a single material is extremely uncommon. With the clear experimental evidence we report a universal mechanism that controls the ZTE behavior of the

Influence of Ti and Ta doping on the irreversible strain limit of ternary Nb 3 Sn superconducting wires made by the restacked-rod process

April 1, 2010
Author(s)
Najib Cheggour, Loren F. Goodrich, Theodore C. Stauffer, Jolene D. Splett, Xifeng Lu, A. K. Ghosh, G. Ambrosio
Nb 3Sn superconducting wires made with restacked-rod process (RRP®) were found to have a dramatically improved resilience to axial tensile strain when alloyed with Ti as compared to Ta. Whereas Ta-alloyed Nb 3Sn in RRP wires showed permanent damage to its

An experiment for the precision measurement of the radiative decay mode of the neutron

October 5, 2009
Author(s)
R Cooper, Christopher D. Bass, E Beise, H Breuer, Jim Byrne, T E. Chupp, Kevin Coakley, Maynard S. Dewey, B Fisher, Changbo Fu, Thomas R. Gentile, M. McGonagle, Hans Pieter Mumm, Jeffrey S. Nico, Alan Keith Thompson, F E. Wietfeldt
… performed the experiment in the bore of a superconducting magnet where electron, proton, and photon signals were …

Critical-Current Measurements on ITER Nb3Sn Strands: Effect of Temperature

July 29, 2005
Author(s)
Loren F. Goodrich, Najib Cheggour, John (Jack) W. Ekin, Theodore C. Stauffer
Transport critical-current (II c) measurements were made on commercial multifilamentary Nb 3Sn strands at temperatures (T) from 4 to 17 K and magnetic fields (H) from 0 to 14 T. Samples investigated were taken from the stage 1 pre-production strand for the
Displaying 2401 - 2425 of 3361
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