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Topic Area: Physics
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Displaying records 591 to 600 of 733 records.
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591. Spin transport parameters in metallic multilayers determined by ferromagnetic resonance measurements of spin-pumping
Topic: Physics
Published: 4/19/2013
Authors: Carl Thomas Boone, Hans Toya Nembach, Justin M Shaw, Thomas J Silva
Abstract: We measured spin-transport in nonferromagnetic (NM) metallic multilayers from the contribution to damping due to spin pumping from a ferromagnetic Co^d90^Fe^d10^ thin film. The multilayer stack consisted of NM^d1^/NM^d2^/Co^d90^Fe^d10^(2 nm)/NM^d2^/N ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912988

592. Spin-transfer dynamics in spin valves with out-of-plane magnetized CoNi free layers
Topic: Physics
Published: 1/29/2010
Authors: William H Rippard, Alina M Deac, Matthew R Pufall, Justin M Shaw, Mark W Keller, Stephen E Russek, Gerrit E Bauer, Claudio Serpico
Abstract: We have measured spin-transfer-induced dynamics in magnetic nanocontact devices having a perpendicularly magnetized Co/Ni free layer and an in-plane magnetized CoFe fixed layer. The frequencies and powers of the excitations agree well with the predic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903981

593. Spiral Resonators for On-Chip Laser Frequency Stabilization
Topic: Physics
Published: 9/17/2013
Authors: Scott A Diddams, Hansuek Lee, Myoung=Gyun Suh, Tong Chen, Jiang Li, Kerry J. Vahala
Abstract: Frequency references are indispensable to radio, microwave, and time keeping systems, with far reaching applications in navigation, communi- cation, remote sensing, and basic science. Over the past decade there has been an optical revo- lution in tim ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913960

594. Stabilization of femtosecond laser frequency combs with subhertz residual linewidths
Topic: Physics
Published: 5/15/2004
Authors: A Bartels, Christopher W Oates, Leo W. Hollberg, Scott A Diddams
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104845

595. Standardization of Broadband UV Measurements for 365 nm LED Sources
Series: Journal of Research (NIST JRES)
Report Number: 117.004
Topic: Physics
Published: 2/2/2012
Author: George P Eppeldauer
Abstract: Broadband UV measurements are analyzed when UV-A irradiance meters measure optical radiation from 365-nm sources. The CIE standardized rectangular-shape UV-A function can be realized only with large spectral mismatch errors. The spectral power-di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909003

596. State Discriminiation Signal Nulling Receivers
Topic: Physics
Published: 9/6/2011
Authors: Francisco E. Becerra Chavez, Jingyun Fan, Gerald Baumgartner, Sergey V Polyakov, Julius Goldhar, Jonathan Kosloski, Alan L Migdall
Abstract: Optimized state-discrimination receiver strategies for nonorthogonal states can improve the capacity of the communication channels operating with error rates below the ones corresponding to conventional receivers. Coherent signal-nulling receivers us ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909465

597. State Resolved THz Spectroscopy and Dynamics of Crystalline Peptide/Water Systems
Topic: Physics
Published: 7/11/2011
Authors: Zeeshan Ahmed, Shin G. Chou, Karen M. Siegrist, David F Plusquellic
Abstract: State resolved THz studies of crystalline peptides and their hydrates have provided precise measures of the infrared active phonon modes that reflect motions on the longest possible length scales in these systems. The impact of co-crystallized water ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907455

598. State-of-the-Art RF Signal Generation From Optical Frequency Division
Topic: Physics
Published: 9/2/2013
Authors: Archita Hati, Craig W Nelson, Corey Andrew Barnes, Danielle Grace Lirette, Tara Michele Fortier, Franklyn J Quinlan, Jason A. (Jason) DeSalvo, Andrew D Ludlow, Till P Rosenband, Scott A Diddams, David Allan Howe
Abstract: We present the design of a novel, ultra-low phase-noise frequency synthesizer implemented with extremely low noise regenerative frequency dividers. This synthesizer generates eight outputs viz. 1.6 GHz, 320 MHz, 160 MHz, 80 MHz, 40 MHz, 20 MHz, 10 MH ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911991

599. Status of a compact cold-atom CPT frequency standard
Topic: Physics
Published: 7/31/2011
Authors: Elizabeth A Donley, Francois-Xavier R. Esnault, John E Kitching, Eugene N Ivanov
Abstract: We describe the main progress towards the realization of a cold atom frequency standard based on coherent population trapping (CPT). We explain our particular CPT configuration and give details on the experimental setup.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908614

600. Steering a Time Scale
Topic: Physics
Published: 12/1/2008
Author: Judah Levine
Abstract: A time scale is a procedure for combining the data from an ensemble of clocks or frequency standards. The input data to the ensemble algorithm are generally the time (or frequency) differences between each of the members and the reference device for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901112



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