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You searched on: Topic Area: Nanomagnetics

Displaying records 1 to 10 of 29 records.
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1. Phase-resolved ferromagnetic resonance using heterodyne detection method
Topic: Nanomagnetics
Published: 4/28/2016
Authors: Seungha Yoon, Hau Jian Liu, Robert D McMichael
Abstract: This paper describes a phase-resolved ferromagnetic resonance (FMR) measurement using a heterodyne method. Spin precession is driven by microwave fields and detected by 1550 nm laser light that is modulated at a frequency slightly shifted with re ...

2. 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 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 ...

3. 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 ...

4. 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 ...

5. 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 in ...

6. 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 ...

7. 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 ...

8. 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 ...

9. 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 ...

10. 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 ...

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