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NIST Authors in Bold

Displaying 2051 - 2075 of 3361

Physical properties of Al doped Ba hexagonal ferrite thin films

January 22, 2013
Author(s)
Harward Ian, Yan Nie, Daming Chen, Josh Baptist, Justin Shaw, Eva J. Liskova, Stefan Visnovsky, Petr Siroky, Michal Lesnak, Jaromir Pistora, Zbigniew Celinski
We developed the thin film microwave magnetic material, M-type barium hexagonal ferrite (BaM) doped with Al, for signal processing devices operating above 40 GHz with little to no applied magnetic field. Al was chosen as the dopant material because it

SURF III - A New Electron Storage Ring at NIST

October 15, 1999
Author(s)
R A. Bosch, D E. Eisert, Mitchell L. Furst, R M. Graves, L Greenler, A D. Hamilton, L R. Hughey, R P. Madden, P Robl, Ping-Shine Shaw, W S. Trzeciak, Robert E. Vest, D Wahl
… Center at UW. SURF III remains a weak-focusing, single-magnet storage ring with a circular orbit. However the original 140-ton laminated iron core magnet has been replaced with one having a 200-ton solid iron … operation over an energy range of 100 Me V - 400 MeV. The magnet system design was optimized using both 2-D and 3-D …

Proton and Ammonia Intercalation into Layered Iron Chalcogenides

June 25, 2018
Author(s)
Xiuquan Zhou, Brandon Wilfong, Sz-Chian Liou, Halyna Hodovanets, Craig Brown, Efrain E. Rodriguez
Structurally related to the iron-based superconductors, two new intercalated iron chalcogenides (H 0.5NH 3)Fe 2Ch 2 where Ch = S, Se have been prepared. By topochemical conversion, the protons were exchanged by lithium to form (Li 0.5NH 3)Fe 2Ch 2

Interfacial Symmetry Control of Emergent Ferromagnetism at the Nanoscale

September 14, 2016
Author(s)
Alexander J. Grutter, A. Vailionis, Julie A. Borchers, Brian J. Kirby, C. L. Flint, C. He, E. Arenholz, Y. Suzuki
We demonstrate tunable switching between ferromagnetic and antiferromagnetic order at the CaRuO 3/CaMnO 3 interface that originates from symmetry differences in the tilt and rotation of the oxygen octahedra across the boundary. Interfaces which are

Quasi-Two-Dimensional Spin and Phonon Excitations in La 1.965 Ba 0.035 CuO 4

June 3, 2015
Author(s)
J. J. Wagman, Daniel E. Parshall, M. B. Stone, A. T. Savici, Yang Zhao, H. A. Dabkowska, B. D. Gaulin
We present time-of-flight inelastic neutron scattering measurements of La 1.965Ba 0.035Cu) 4 (LBCO), a lightly doped member of the high temperature superconducting La-based cuprate family. By using time-of-flight neutron instrumentation coupled with single

Beyond the spin model approximation for Ramsey spectroscopy

March 26, 2014
Author(s)
A Koller, M Beverland, Alexey Gorshkov, Ana Maria Rey
Ramsey spectroscopy has become a powerful technique for probing non-equilibrium dynamics of internal (pseudospin) degrees of freedom of interacting systems. In many theoretical treatments, the key to understanding the dynamics has been to assume the

The DEMO Quasisymmetric Stellarator

February 26, 2010
Author(s)
Paul R. Garabedian, Geoffrey B. McFadden
The NSTAB code solves differential equations in conservation form, and the TRAN test particle code tracks guiding center orbits in a fixed background, to provide simulations of equilibrium, stability, and transport in tokamaks and stellarators. These codes

Enhanced ferromagnetic damping in Permalloy/Cu bilayers

January 18, 2006
Author(s)
Thomas Gerrits, Michael Schneider, Thomas J. Silva
We have investigated the enhancement of ferromagnetic damping for thin Permalloy (Ni 80Fe 20) films grown with Cu capping layers of variable thickness (5-1000nm). The measurements were performed with a pulsed inductive microwave magnetometer in the

IPC-Split Cylinder Standard

January 1, 2005
Author(s)
James R. Baker-Jarvis
This method is intended for the nondestructive measurement of the relative permittivity and loss tangent of unclad dielectric substrates at microwave frequencies using a split-cylinder resonator

Order-Disorder and Phase Separation

October 28, 2015
Author(s)
Benjamin P. Burton
… magnetic moments in a ferro-, ferri-, or antiferro-magnet; electric dipoles in a ferroelectric crystal. At …

Anharmonic Phonons and Magnons in BiFeO 3

February 13, 2012
Author(s)
O. Delaire, M. B. Stone, J. Ma, A. Huq, D. Gout, Craig Brown, K. F. Wang, Z. F. Ren
The phonon density of states (DOS) and magnetic excitation spectrum of polycrystalline BiFeO 3 were measured for temperatures 200 less than or equal to}Τ less than or equal to} 750K, using inelastic neutron scattering (INS). Our results indicate that the

Perspective on Probing Metallic Ferromagnetism with Electrons

March 21, 2011
Author(s)
Daniel T. Pierce
This article presents a brief review of some of the many insights gained about metallic ferromagnetism using spin-polarized electrons as probes. Aspects of metallic ferromagnetism discussed include spin-dependent electronic structure, spin-dependent mean

DC Internal Inductance for a Conductor of Rectangular Cross Section

April 3, 2009
Author(s)
Christopher L. Holloway, Edward Kuester
In this paper, the DC internal inductance for conductors with rectangular cross-section is investigated. Using a quasistatic Green's function, the magnetic fields inside a rectangular conductor are derived. These magnetic field expressions are used to

Experimental determination of the inhomogeneous contribution to linewidth in Permalloy films using a time-resolved magneto-optic Kerr effect microprobe

September 12, 2007
Author(s)
Michael Schneider, Thomas Gerrits, Anthony B. Kos, Thomas J. Silva
We adapted a time-resolved magneto-optic microprobe for use with the pulsed inductive microwave magnetometer apparatus, allowing us to measure the magnetization dynamics of a thin Permalloy film at micrometer and millimeter length scales under exactly the

Particle and Photon Detection for a Neutron Radiative Decay Experiment

April 11, 2007
Author(s)
Thomas R. Gentile, Maynard S. Dewey, Hans P. Mumm, Jeffrey S. Nico, Alan K. Thompson, T E. Chupp, R Cooper, B M. Fisher, I Kremsky, F E. Wietfeldt, K G. Kiriluk, E Beise
… a temperature near 80 K in the bore of a superconducting magnet. We discuss CsI as an alternative scintillator, and …

Artifacts in Ballistic Magnetoresistance Measurements

June 1, 2004
Author(s)
William F. Egelhoff Jr., L Gan, H Ettedgui, Y Kadmon, Cedric J. Powell, P J. Chen, Alexander J. Shapiro, Robert McMichael, J Mallett, Thomas P. Moffat, Mark D. Stiles, Erik B. Svedberg
We have studied the behavior of electrodeposited Ni and Fe nanocontacts in magnetic fields and the changes in resistivity (Δ}R) that occur. Metallic particles suspended in plating solution, created and collected from the electroplating bath of a

Micromechanical Instruments for Ferromagnetic Measurements

January 1, 2003
Author(s)
John M. Moreland
I review some of the novel methods for measuring ferromagnetic properties of thin films based on micromechanical magnetometers. Measurements rely on the detection of mechanical forces or torques on samples deposited onto microcantilevers. Displacements of
Displaying 2051 - 2075 of 3361
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