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You searched on: Topic Area: Magnetics

Displaying records 1 to 10 of 11 records.
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1. Radiative damping in wave guide based FMR measured via analysis of perpendicular standing spin waves in sputtered Permalloy films
Topic: Magnetics
Published: 11/17/2015
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Mathias Weiler, Martin Schoen
Abstract: The damping α of the spinwave resonances in 75 nm, 120 nm, and 200 nm -thick Permalloy films is measured via vector-network- analyzer ferromagnetic-resonance (VNA-FMR). Inductive coupling between the sample and the waveguide leads to an addition ...

2. Critical current and linewidth reduction in spin-torque nano-oscillators by delayed self-injection
Topic: Magnetics
Published: 6/15/2015
Authors: Guru Bahadur S Khalsa, Mark D Stiles, Julie Grollier
Abstract: Based on theoretical models, the dynamics of spin torque nano-oscillators can be substantially modified by re-injecting the emitted signal to the input of the oscillator after some delay. Numerical simulations for vortex magnetic tunnel junctions sho ...

3. On-wafer Magnetic Resonance of Magnetite Nanoparticles
Topic: Magnetics
Published: 5/11/2015
Authors: Charles Anderson Enright Little, Stephen E Russek, James C Booth, Pavel Kabos, Robert J. Usselman
Abstract: Magnetic resonance measurements of ferumoxytol and TEMPO were made using an on-wafer transmission line technique with a vector network analyzer, allowing for broadband measurements of small sample volumes (4 nl) and a small numbers of spin (1 nmole). ...

4. Comment on ŠDetection of Microwave Spin Pumping Using the Inverse Spin Hall EffectŠ
Topic: Magnetics
Published: 1/27/2014
Authors: Thomas J Silva, Mathias A. Weiler, Hans Toya Nembach, Justin M Shaw
Abstract: In a recent Letter, Hahn et al. reported on the detection of an ac voltage in a yttrium iron garnet (YIG)/platinum (Pt) bilayer under the condition of parametrically excited resonance. The authors observe an ac voltage at the frequency of the magneti ...

5. Microwave Behavior of polymer bonded Iron oxide nanoparticles
Topic: Magnetics
Published: 11/1/2012
Authors: Pavel Kabos, A Caprile, Coisson Marco, F Fiorillo, O M Manu, E. S. Olivetti, M. A. Olariu, Pasquale Massimo, V. A. Scarlatache
Abstract: Samples composed of a polymer matrix were loaded with different fractions from 0 to 30% of Fe oxide magnetic nanoparticles with an average size ranging from 50 to 25 nm. The permittivity and permeability of the composites were determined upon a very ...

6. Ultrafast Demagnetization Measurements using Extreme Ultraviolet Light: Comparison of Electronic and Magnetic Contributions
Topic: Magnetics
Published: 1/23/2012
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Margaret M. Murnane, Henry C. Kapteyn, Chan La-O-Vorakiat, Stefan Mathias, Emrah Turgut, Teale A. Carson, Martin Aeschlimann, Claus M. Schneider
Abstract: Ultrashort pulses of extreme ultraviolet light from high-harmonic generation are a new tool for probing coupled charge, spin, and phonon dynamics with element specificity, attosecond pump-probe synchronization, and time resolution of a few-femtosecon ...

7. Perpendicular ferromagnetic resonance measurements of damping and Landé g-factor in sputtered (Co^d2^Mn)^d1-x^Ge^dx^ thin films
Topic: Magnetics
Published: 8/8/2011
Authors: Thomas J Silva, Hans Toya Nembach, Justin M Shaw, Michael Schneider, Matt Carey, Stefan Maat, Jeff Childress
Abstract: X-ray diffraction (XRD), magnetometry, and ferromagnetic resonance (FMR) measurements were performed on sputtered thin films of the nominal Heusler alloy (Co^d2^Mn)^d1-x^Ge^dx^ with varying Ge content and annealing temperature. XRD indicates some deg ...

8. Development of a multifilament PIT V3Ga conductor for fusion applications
Topic: Magnetics
Published: 6/12/2011
Authors: Najib Cheggour, Theodore C Stauffer, Loren Frederick Goodrich, L. R. Motowidlo, J Distin, P. J. Lee, David C. Larbalestier, A. K. Ghosh
Abstract: Previous studies on V3Ga assert its suitability for use in proposed fusion reactors. V3Ga may outperform Nb3Sn in a fusion reactor environment based on its relatively flat critical-current profile in the 15 T- 20 T range, resilience to applied strain ...

9. Strain and Magnetization Properties of High Subelement Count Tube-type Nb3Sn Strands
Topic: Magnetics
Published: 6/6/2011
Authors: Najib Cheggour, X Peng, E Gregory, M Tomsic, M D Sumption, A. K. Ghosh, Xifeng Lu, Theodore C Stauffer, Loren Frederick Goodrich, Jolene D Splett
Abstract: Abstract,A tubular technique for economical production of Nb3Sn material with large numbers of subelements is being explored by Supergenics I LLC and Hyper Tech Research Inc. The number of subelements was increased to 919 (744 subelements plus 175 Cu ...

10. Electromagnetic Metrology on Concrete and Corrosion
Series: Journal of Research (NIST JRES)
Topic: Magnetics
Published: 6/1/2011
Authors: Sung Kim, Jack T Surek, James R. Baker-Jarvis
Abstract: To go beyond current electromagnetic nondestructive evaluation (NDE) methods for reinforcing bar (rebar) corrosion we are exploring unique magnetic or electric spectral features and whether these might be prominent enough at the concrete cover depth ...

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