Using time-resolved magneto-optical Kerr effect (TR-MOKE) method, helicity-dependent all-optical magnetization switching (HD-AOS) is observed in ferrimagnetic TbFeCo films. The thermal effect and ...opto-magneto effects are separately justified after single circularly polarized laser pulse. The integral evolution of this ultrafast switching is characterized on different time scales and the defined magnetization reversal time of 460 fs is the fastest ever observed. Combining the heat effect and inverse Faraday effect (IFE), micromagnetic simulations based on a single macro-spin model are performed that reproduce HD-AOS following a linear reversal mechanism.
In order to meet the needs of designing and processing digitized surfaces,the method to spreading digitized surface has been proposed.The key technique is to solve the problem of digitized conjugate ...surface.In the paper,the digitized conjugate surface was theoretically investigated,and the solution of conjugate surface based on digitized surface was also studied.The digitized conjugate surface theory was then proposed,and applied to build the model of solving conjugate surface based on digitized surface.A corresponding algorithm was developed.This paper applies the software Conjugater1.0 that is developed by ourselves to compute the digitized conjugate surfaces of the drum-tooth surface.This study provides theoretical and technical bases for analyzing engagement of digitized surface,simulation and numerical processing technique.
The relationship between the complexation amount of thorium (Th) and Suwannee River fulvic acid (SRFA) and the changes in Th concentration and pH were studied using differential spectroscopy and 3D ...excitation-emission matrix fluorescence spectroscopy (3D EEM). Experiments were performed at different Th concentrations and pH values. In the differential spectra at different concentrations, four bands of aromatic components appeared, and thorium was complexed with the carboxyl groups in SRFA. The 3D EEM spectra showed a fulvic acid-like fluorescence region, a visible-light fulvic acid region, and the blueshift phenomenon. The fluorescence intensity decreased with increasing thorium concentration and increased with increasing pH. The results showed that the amount of complexation of thorium and SRFA increased with increasing thorium concentration, and high pH was not conducive to the complexation of thorium and SRFA.
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