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You searched on: Topic Area: Condensed Matter Physics

Displaying records 11 to 20 of 48 records.
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11. Properties of magnetic barrier structures for superconducting-magnetic hybrid Josephson junctions
Topic: Condensed Matter Physics
Published: 7/7/2013
Authors: Burm Baek, Samuel Paul Benz, William H Rippard, Stephen E Russek, Paul David Dresselhaus, Horst Rogalla, Matthew R Pufall
Abstract: If Josephson and spintronic technologies can be successfully integrated to produce a cryogenic memory that can be controlled with single-flux quantum pulses, then they may enable ultra-low-power, high-speed computing. We have developed hybrid Josephs ...

12. 99.996% 12C films enriched and deposited in situ
Topic: Condensed Matter Physics
Published: 6/28/2013
Authors: Kevin Joseph Dwyer, Joshua M Pomeroy, David S Simons
Abstract: A mass selected ion beam system is used to isotopically enrich and deposit thin films, which are measured to be 99.9961(4)% 12C. In solid state quantum information, isotopic enrichment of materials has allowed significant improvements in the coheren ...

13. Controlling the Competition between Optically Induced Ultrafast Spin-Flip Scattering and Spin Transport in Magnetic Multilayers
Topic: Condensed Matter Physics
Published: 5/7/2013
Authors: Justin M Shaw, Hans Toya Nembach, Thomas J Silva, Margaret M. Murnane, Henry C. Kapteyn, Martin Aeschlimann, Claus M. Schneider, Emrah Turgut, Stefan Mathias, Patrik Grychtol, Chan La-O-Vorakiat, Dennis Rudolf, Roman Adam
Abstract: The study of ultrafast dynamics in magnetic materials provides rich opportunities for greater fundamental understanding of correlated phenomena in solid-state matter, because many of the basic microscopic mechanisms involved are as-yet unclear and ar ...

14. Spin transport parameters in metallic multilayers determined by ferromagnetic resonance measurements of spin-pumping
Topic: Condensed Matter Physics
Published: 4/19/2013
Authors: Carl T. 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 ...

15. Spin-Transfer Nano-Oscillators
Topic: Condensed Matter Physics
Published: 1/7/2013
Authors: Stephen E Russek, Ranko R. Heindl, Thomas Cecil, William H Rippard
Abstract: Spin transfer nano-oscillators are small multilayer magnetic devices that undergo microwave oscillations and output a microwave voltage when a bias current is applied. The oscillation frequency is tunable, over a range of 0.5 GHz to 225 GHz, by vary ...

16. Ultrafast element-specific magnetization Dynamics of complex magnetic materials on a table-top
Topic: Condensed Matter Physics
Published: 12/21/2012
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Chan La-O-Vorakiat, Henry C. Kapteyn, Margaret M. Murnane, Stefan Mathias, Roman Adam, Patrik Grychtol, Martin Aeschlimann, Claus M. Schneider, Emrah Turgut, Dennis Rudolf
Abstract: We review recent progress in femtosecond magnetization dynamics probed by extreme ultraviolet pulses from high-harmonic generation. In a transverse magneto-optical Kerr geometry, we establish an ultrafast, element-specific experimental capability - ...

17. Epitaxial (111) Films of Cu, Ni, and Cu^dx^Ni^dy^ on {alpha}{long dash}Al^d2^O^d3^(0001) for graphene growth by chemical vapor deposition
Topic: Condensed Matter Physics
Published: 9/21/2012
Authors: David L. Miller, Mark W Keller, Justin M Shaw, Ann Chiaramonti Chiaramonti Debay, Robert R Keller
Abstract: Films of (111)-textured Cu, Ni, and Cu^dx^Ni^dy^ were evaluated as substrates for chemical vapor deposition of graphene. A metal thickness of 400 nm to 700 nm was sputtered onto a substrate of {alpha}{long dash}Al^d2^O^d3^(0001) at temperatures of {I ...

18. Spin Dynamics in the Time and Frequency Domain
Topic: Condensed Matter Physics
Published: 9/15/2012
Author: Thomas J Silva
Abstract: The current status of experimental approaches to analyze the spin wave dynamics in ferromagnetic nanoscale structures is reviewed. Recent developments in frequency- and field swept spectroscopy to determine the resonant response of nanoscale ferromag ...

19. Anisotropic frequency response of spin-torque oscillators with applied field polarity and direction
Topic: Condensed Matter Physics
Published: 9/4/2012
Authors: Matthew R Pufall, William H Rippard, Stephen E Russek, Eric Raymond Evarts
Abstract: We have measured spin-torque-driven oscillations of Ni80Fe20 free-layer nanocontacts as a function of field direction. For a given field axis angle (10◦ from the surface normal) and magnitude, simply changing the field polarity can significantl ...

20. Ultrafast manetization enhancement in metallic multilayers driven by superdiffusive spin current
Topic: Condensed Matter Physics
Published: 9/4/2012
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Dennis Rudolf, Chan La-O-Vorakiat, Marco Battiato, Roman Adam, Emrah Turgut, Stefan Mathias, Margaret M. Murnane, Henry C. Kapteyn, Claus M. Schneider
Abstract: Uncovering the physical mechanisms that govern ultrafast charge and spin dynamics is crucial for understanding correlated matter as well as the fundamental limits of ultrafast spin-based electronics. Spin dynamics in magnetic materials can be driven ...

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