Ultrafast Magnetization Dynamics Studies Using An X Ray Streakcamera
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Author | : A. Young |
Publisher | : |
Total Pages | : |
Release | : 2005 |
Genre | : |
ISBN | : |
Download Ultrafast Magnetization Dynamics Studies Using an X-ray Streakcamera Book in PDF, Epub and Kindle
The spin dynamics of ferromagnetic thin films following an excitation by ultrashort 100-fs near-infrared laser pulses has recently received much attention. Here, a new approach is described using x-ray magnetic circular dichroism to investigated emagnetization and magnetization switching processes. In contrast to magneto-optical measurements, x-ray dichroism has the advantage of determining separately the spin and orbital components of the magnetic moment. The relatively low time resolution of the synchrotron x-ray probe pulses (80 ps FWHM) is overcome by employing an ultrafast x-ray streak camera with a time resolution of
Author | : Stuart Kleinfelder |
Publisher | : SPIE-International Society for Optical Engineering |
Total Pages | : 292 |
Release | : 2005 |
Genre | : Photography |
ISBN | : |
Download Ultrafast X-ray Detectors, High-speed Imaging, and Applications Book in PDF, Epub and Kindle
Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
Author | : Simon Woodford |
Publisher | : Forschungszentrum Jülich |
Total Pages | : 137 |
Release | : 2008 |
Genre | : Magnetic fields |
ISBN | : 3893365362 |
Download Ultrafast Magnetization Dynamics Book in PDF, Epub and Kindle
Author | : Jae-Young Choi |
Publisher | : American Institute of Physics |
Total Pages | : 964 |
Release | : 2007-02-27 |
Genre | : Science |
ISBN | : 9780735403734 |
Download Synchrotron Radiation Instrumentation Book in PDF, Epub and Kindle
The SRI2006 Proceedings features the most recent developments in present synchrotron radiation sources. It also features up-to-date free electron lasers atphoton energies from the infrared to hard X-rays, beamline instrumentation to transport the radiation to the experiments, as well as experimental techniques to utilize it. Further included are recent experimental results in synchrotron radiation sciences.
Author | : |
Publisher | : |
Total Pages | : 612 |
Release | : 1976 |
Genre | : Nuclear energy |
ISBN | : |
Download Nuclear Science Abstracts Book in PDF, Epub and Kindle
Author | : Lisa Willig |
Publisher | : |
Total Pages | : |
Release | : 2019 |
Genre | : |
ISBN | : |
Download Ultrafast Magneto-optical Studies of Remagnetisation Dynamics in Transition Metals Book in PDF, Epub and Kindle
Ultrafast magnetisation dynamics have been investigated intensely for two decades. The recovery process after demagnetisation, however, was rarely studied experimentally and discussed in detail. The focus of this work lies on the investigation of the magnetisation on long timescales after laser excitation. It combines two ultrafast time resolved methods to study the relaxation of the magnetic and lattice system after excitation with a high fluence ultrashort laser pulse. The magnetic system is investigated by time resolved measurements of the magneto-optical Kerr effect. The experimental setup has been implemented in the scope of this work. The lattice dynamics were obtained with ultrafast X-ray diffraction. The combination of both techniques leads to a better understanding of the mechanisms involved in magnetisation recovery from a non-equilibrium condition. Three different groups of samples are investigated in this work: Thin Nickel layers capped with nonmagnetic materials, a continuous sample of the ordered L10 phase of Iron Platinum and a sample consisting of Iron Platinum nanoparticles embedded in a carbon matrix. [...]
Author | : Matthew Clemens Langner |
Publisher | : |
Total Pages | : 258 |
Release | : 2009 |
Genre | : |
ISBN | : |
Download Ultrafast Magnetization Dynamics of SrRu03 Thin Films Book in PDF, Epub and Kindle
Author | : |
Publisher | : |
Total Pages | : 640 |
Release | : 1977 |
Genre | : |
ISBN | : |
Download ERDA Energy Research Abstracts Book in PDF, Epub and Kindle
Author | : Colleen Kantner |
Publisher | : |
Total Pages | : 162 |
Release | : 2010 |
Genre | : |
ISBN | : |
Download Ultrafast Magnetization Dynamics in the Presence of Strong Spin-Orbit Coupling Book in PDF, Epub and Kindle
The time-resolved magneto-optical Kerr effect is used to study magnetization dynamics in thin films of SrRuO3. This thesis focuses on two topics in particular: the influence of epitaxial strain on magnetization dynamics and magnetic orientation, and the origin of the dramatic slowing down of the demagnetization time near the Curie temperature. Magnetization dynamics in SrRuO3 are initiated by a temperature dependent rotation of the magnetocrystalline anisotropy field direction upon thermal excitation by the laser. The resulting dynamics depend on the orientation of the anisotropy field in the sample. We observe a change in the orientation as a function of epitaxially strain by looking at SrRuO3grown on various substrates with (001) orientation and distinct in-plane lattice parameters. We find that in SrRuO3 films under compressive strain, the anisotropy field moves in a plane perpendicular to the film surface. Beyond a certain degree of tensile strain, the anisotropy field moves in the plane parallel to the surface of the film. Support of this result from theoretical calculations and XRD measurements is discussed and attempts to strain tune films with a piezoelectric substrate are described. Near the Curie temperature, the demagnetization time in SrRuO3/SrTiO3(111) is found to increase by more than a factor of ten. Here, we study this effect in detail and derive an equation for the demagnetization time in terms of the spin flip time, starting from detailed balance and borrowing from a recent spin-based model for demagnetization[57, 58]. The demagnetization time is found to be proportional to the spin flip time and inversely proportional to the reduced temperature near Tc, allowing us to measure the spin flip time. We also relate the spin flip time and the damping parameter to the Curie temperature and find that the previously speculated upon relationship between the damping parameter in SrRuO3 and the anomalous Hall effect is strengthened.
Author | : |
Publisher | : |
Total Pages | : 704 |
Release | : 1995 |
Genre | : Aeronautics |
ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, Epub and Kindle