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Topic Area: Nanomagnetics
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Displaying records 11 to 20 of 218 records.
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11. Mode- and Size-Dependent Landaue-Lifshitz Damping in Magnetic Nanostructures: Evidence for Nonlocal Damping
Topic: Nanomagnetics
Published: 3/12/2013
Authors: Hans T. Nembach, Justin M Shaw, Carl Thomas Boone, Thomas J Silva
Abstract: We demonstrate a strong dependence of the effective damping on the nanomagnet size and the particular spin-wave mode, that can be explained by the theory of intralayer transverse-spin pumping. The effective Landau-Lifshitz damping is measured optical ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912149

12. 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 T. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913103

13. Spectroscopy and imaging of edge modes in Permalloy nanodisks
Topic: Nanomagnetics
Published: 1/3/2013
Authors: Feng Guo, Lyubov Belova, Robert D McMichael
Abstract: This paper reports spectroscopy and imaging of spin wave modes using ferromagnetic resonance force microscopy (FMRFM) in Permalloy nano-disks with disk diameters that range from 100 nm to 750 nm. The ferromagnetic resonance spectra distinguish multip ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911716

14. Two dimensional spectroscopic imaging of individual ferromagnetic nanostripes
Topic: Nanomagnetics
Published: 11/6/2012
Authors: Han-Jong H. Chia, Feng Guo, Lyubov Belova, Robert D McMichael
Abstract: We use ferromagnetic resonance force microscopy (FMRFM) to spectroscopically image the edge modes in individual 700 and 400 nm wide Permalloy stripes with a spatial resolution on the order of 200 nm. The imaging clearly identi es some resonances as ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911361

15. Spectroscopic defect imaging in magnetic nanostructure arrays
Topic: Nanomagnetics
Published: 7/25/2012
Authors: Han-Jong H. Chia, Feng Guo, Lyubov Belova, Robert D McMichael
Abstract: We report a demonstration of spectroscopic defect imaging in an array of ferromagnetic structures using ferromagnetic resonance force microscopy (FMRFM). The arrray of 200 nm diameter circular dots includes a single oval-shaped ,defect.Š The techni ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910697

16. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911158

17. Micromagnetic Computer Simulated Scaling Effect of S-shaped Permalloy Nano-element on Operating Fields for AND or OR Logic
Topic: Nanomagnetics
Published: 5/1/2012
Author: Michael J Donahue
Abstract: The scaling effect of Permalloy s-shaped element, a modified rectangular element with appendages, on operating fields, Hx and Hy, was investigated by micromagnetic computer simulation for AND or OR logic. The optimized combination of operating fiel ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906214

18. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909301

19. Determination of spin pumping as a source of linewidth sputtered Co^d90^Fe^d10^/Pd multilayers by use of broadband ferromagnetic resonance spectroscopy
Topic: Nanomagnetics
Published: 2/10/2012
Authors: Justin M Shaw, Hans T. Nembach, Thomas J Silva
Abstract: We performed a systematic study of damping in Co^d90^Fe^d10^/Pd multilayers by use of broadband (1‹ 60 GHz) ferromagnetic resonance (FMR) spectroscopy in the perpendicular geometry. The data were fitted with the conventional Landau-Lifshitz equation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909645

20. Formation and structure of 360 and 540 degree domain walls in thin magnetic stripes
Topic: Nanomagnetics
Published: 2/10/2012
Authors: Youngman Jang, Samuel R Bowden, Mark Mascaro, John Unguris, Caroline Ross
Abstract: 360˚, 540˚ and other complex transverse domain walls have been created in narrow Co wires connected to injection pads by cycling a magnetic field perpendicular to the wire length. The composite walls, formed by impingement of 180˚ tran ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910019



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