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Start Over Author "E, Hohenstein" Topic 01 natural sciences
3 results on '"E, Hohenstein"'

1. Demagnetizing fields in all-optical switching

Author

S. Smadici, F. Hoveyda, E. Hohenstein, and R. Judge

Subjects
Physics, Range (particle radiation), Magnetic energy, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics, Perpendicular magnetic anisotropy, Condensed Matter::Other, Physics::Medical Physics, FOS: Physical sciences, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Condensed Matter::Disordered Systems and Neural Networks, Connection (mathematics), All optical, Condensed Matter::Materials Science, Condensed Matter::Superconductivity, Physics::Space Physics, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Cylinder, General Materials Science, 010306 general physics, 0210 nano-technology
Abstract

Time-resolved pump-probe measurements show ultrafast and heat accumulation demagnetization in Co/Pd superlattices on glass substrates. A model of demagnetizing fields and micromagnetic simulations are applied to examine the evolution of a demagnetized cylinder into a switched state., Comment: 8 pages, 7 figures

Published
2017

2. Heat accumulation and all-optical switching by domain wall motion in Co/Pd superlattices

Author

E. Hohenstein, S. Smadici, and F. Hoveyda

Subjects
Condensed Matter - Materials Science, Materials science, Condensed matter physics, Superlattice, Motion (geometry), Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, All optical, Domain wall (magnetism), 0103 physical sciences, General Materials Science, Heat equation, 010306 general physics, 0210 nano-technology
Abstract

All-optical switching by domain wall motion has been observed in Co/Pd superlattices. Heat accumulation is part of the switching process for our experimental conditions. Numerical calculations point to a connection between domain wall motion and in-plane heat diffusion., Comment: 16 pages, 8 figures

Published
2016
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3. Ultrafast demagnetization at high temperatures

Author

E. Hohenstein, R. Judge, S. Smadici, and F. Hoveyda

Subjects
Materials science, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Scattering, Thermodynamic equilibrium, Superlattice, Demagnetizing field, FOS: Physical sciences, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Fluence, Condensed Matter::Materials Science, Magnetization, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Curie temperature, General Materials Science, Transient (oscillation), 010306 general physics, 0210 nano-technology
Abstract

Time-resolved pump-probe measurements were made at variable heat accumulation in Co/Pd superlattices. Heat accumulation increases the baseline temperature and decreases the equilibrium magnetization. Transient ultrafast demagnetization first develops with higher fluence in parallel with strong equilibrium thermal spin fluctuations. The ultrafast demagnetization is then gradually removed as the equilibrium temperature approaches the Curie temperature. The transient magnetization time-dependence is fit well with the spin-flip scattering model., Comment: 6 pages, 5 figures

Published
2018

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