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You searched on: Topic Area: Nanomagnetics

Displaying records 1 to 10 of 27 records.
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1. Quantitative magnetometry of ferromagnetic nanorods by microfluidic analytical magnetophoresis
Topic: Nanomagnetics
Published: 9/3/2015
Authors: Andrew Lee Balk, Lamar O. Mair, Feng Guo, Carlos M. Hangarter, Pramod Pappachan Mathai, Robert D McMichael, Samuel M Stavis, John NMN Unguris
Abstract: We introduce an implementation of magnetophoresis to measure the absolute magnetization of ferromagnetic nanorods dispersed in fluids, by analyzing the velocity of single nanorods under an applied magnetic field gradient. A microfluidic guideway prev ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915308

2. Physical implementation of coherently-coupled oscillator networks
Topic: Nanomagnetics
Published: 8/13/2015
Authors: Matthew R Pufall, William H Rippard, Gyorgy Csaba, Wolfgang Porod, George Bourianoff, Dmitri Nikonov
Abstract: We present a combined experimental and simulation study of the physical implementation of coherently coupled oscillator networks composed of spin-torque oscillators (STOs). Based on published works and on our recent experiments, we review the behavio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915193

3. Linear relation between Heisenberg exchange and interfacial Dzyaloshinskii‹Moriya interaction in metal films
Topic: Nanomagnetics
Published: 8/3/2015
Authors: Hans Toya Nembach, Justin M Shaw, Mathias A. Weiler, Emilie Marie Jue, Thomas J Silva
Abstract: Proposals for novel spin-orbitronic logic and memory devices are often dependent on assumptions as to how materials with large spin-orbit and ferromagnets interact when in contact. Such interactions give rise to a host of novel phenomena, such as spi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917482

4. Spin-scattering rates in metallic thin films measured by ferromagnetic resonance damping enhanced by spin-pumping
Topic: Nanomagnetics
Published: 6/12/2015
Authors: Carl T. Boone, Justin M Shaw, Hans Toya Nembach, Thomas J Silva
Abstract: We determined the spin-transport properties of Pd and Pt thin films by measuring the increase in ferromagnetic resonance damping due to spin-pumping in ferromagnetic (FM)-nonferromagnetic metal (NM) multilayers with varying NM thicknesses. The increa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916038

5. Ferromagnetic resonance measurement using stroboscopic magneto optical Kerr effect
Topic: Nanomagnetics
Published: 6/7/2015
Authors: Takahiro Moriyama, Seungha Yoon, Robert D McMichael
Abstract: We have developed a novel ferromagnetic resonance measurement technique using the magneto optical Kerr effect. The measurement technique uses microwave-frequency, intensity-modulated light to stroboscopically measure the Kerr angle due to the magneti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918253

6. Nonlinear ferromagnetic resonance shift in submicron Permalloy ellipses
Topic: Nanomagnetics
Published: 2/27/2015
Authors: Feng Guo, Lyubov Belova, Robert D McMichael
Abstract: We report a systematic study of nonlinearity in the ferromagnetic resonance of a series of submicron Permalloy ellipses with varying aspect ratios. We focus on the sign of the foldover, a resonance field shift or frequency shift that occurs with hig ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916877

7. Scanning localized magnetic fields in microfluidic device using single spin in nanodiamond
Topic: Nanomagnetics
Published: 2/5/2015
Authors: Jacob M Taylor, K. Lim, Chad Ropp, Benjamin Shapiro, Edo Waks
Abstract: We demonstrate localized magnetometry using a single nitrogen vacancy (NV) center in a microfluidic device. Our approach can manipulate magnetic objects in three dimensions within a liquid environment and also orients their magnetic dipole. A diamond ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915953

8. Magnetic structure and anisotropy of [Co/Pd]_5/NiFe multilayers
Topic: Nanomagnetics
Published: 1/9/2015
Authors: Larysa Tryputen, Feng Guo, Liu Frank, T. N. Anh Nguyen, Majid Mohseni, Sunjae Chung, Yeyu Fang, Johan Akerman, Robert D McMichael, Caroline Ross
Abstract: The magnetization behavior, magnetic anisotropy and domain congurations of Co/Pd multilayers with perpendicular magnetic anisotropy capped with permalloy is investigated using magnetometry, magnetic force microscopy and ferromagnetic resonance. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917113

9. Phase-Sensitive Detection of Spin Pumping via the ac Inverse Spin Hall Effect
Topic: Nanomagnetics
Published: 10/6/2014
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Mathias A. Weiler
Abstract: Sources of pure spin currents are a fundamental building block of spintronic devices. In ferromagnet/normal metal heterostructures, spin currents are generated at ferromagnetic resonance. This is known as spin pumping, where spin currents of both dc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915317

10. Parametric pumping of precession modes in ferromagnetic nanodisks
Topic: Nanomagnetics
Published: 3/26/2014
Authors: Feng Guo, Lyubov Belova, Robert D McMichael
Abstract: We report parametric excitation of magnetic precession modes in nanodisks using a parallel pumping configuration. The excitations are detected using a ferromagneitc resonance force microscopy method, and the parallel-pumped spectra reveal nonlinear c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914534



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