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You searched on: Topic Area: Nanomagnetics Sorted by: title

Displaying records 11 to 20 of 28 records.
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11. Magnetic Depth Profiling Co/Cu Multilayers to Investigate Magnetoresistance
Topic: Nanomagnetics
Published: 5/1/2000
Authors: John Unguris, D Tulchinsky, Michael H Kelley, Julie A Borchers, Joseph A Dura, Charles F Majkrzak, S. Y. Hsu, R Loloee, W Pratt, J Bass
Abstract: The magnetic microstructure responsible for the metastable high resistance state of weakly coupled, as-prepared [Co(6nm)/Cu(6nm)]^d20 ^multilayer was analyzed using polarized neutron reflectivity (PNR) and scanning electron microscopy with polarizati ...

12. 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 ...

13. Magneto-optical observation of four-wave scattering in a 15 nm Ni^d81^Fe^d19^ film during large angle magnetization precession
Topic: Nanomagnetics
Published: 11/14/2011
Authors: Hans Toya Nembach, Karen Livesey, Michael Kostylev, Patrica Martin-Pimentel, Sebastian Hermsdoerfer, Britta Leven, Juergen Fassbender, Burkard Hillebrands
Abstract: Large angle magnetization precession induced by a short pulsed magnetic field in a 15 nm thick Ni^d81^Fe^d19^ film is observed using a time-resolved magneto-optical Kerr effect technique with sensitivity to all three components of the magnetization ...

14. Measurement of orbital asymmetry and strain in Co^d90^Fe^d10^/Ni multilayers and alloys: Origins of perpendicular anisotropy
Topic: Nanomagnetics
Published: 2/13/2013
Authors: Justin M Shaw, Hans Toya Nembach, Thomas J Silva
Abstract: We use broadband ferromagnetic resonance spectroscopy and x-ray diffraction to investigate the fundamental origin of perpendicular anisotropy in Co^d90^Fe^d10^/Ni multilayers. By careful evaluation of the spectroscopic {I}g{/I}-factor, we determine ...

15. Micromagnetic investigation of periodic cross-tie/vortex wall geometry
Topic: Nanomagnetics
Published: 5/18/2012
Author: Michael J Donahue
Abstract: A systematic series of micromagnetic simulations on periodic cross-tie/vortex wall structures in an ideal soft film at various width, thickness, and period lengths is performed. For each width and thickness a natural period length is found which has ...

16. Nanoscale spin wave localization using ferromagnetic resonance force microscopy
Topic: Nanomagnetics
Published: 2/24/2012
Authors: Han-Jong H. Chia, Feng Guo, Lyubov Belova, Robert D McMichael
Abstract: We utilize ferromagnetic resonance force microscopy (FMRFM) to generate and detect multiple localized spin wave modes with spatial dimensions less than 100 nm in ferromagnetic thin films. Localized spin waves are a potentially powerful tool for ima ...

17. 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 ...

18. 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 ...

19. 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 ...

20. 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 ...

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