Pulsed Laser Impact on Ferrimagnetic Nanostructures

Mykola Krupa¹ and Andrii Korostil^1,

¹Department of Nanostructure Physics, Institute of Magnetism NASU, Kyiv, Ukraine

Cite this paper:
Mykola Krupa and Andrii Korostil. Pulsed Laser Impact on Ferrimagnetic Nanostructures. International Journal of Physics. 2013; 1(2):28-40. doi: 10.12691/ijp-1-2-2

Abstract

We have studied the mechanisms of a pulsed laser impact on the magnetization conFigureuration in ferrimagnetic multilayered magnetic nanostructures, specifically, tunneling magnetic junctions. The mechanism of such the laser-induced impact is a complex process of laser-induced thermal demagnetization of magnetic sublattices with subsequent biasing by internal magnetic fields of different nature. Depending on an intensity of laser pulses it can be effective internal magnetic fields of laser irradiation or internal magnetic fields connected with different rates of the heat demagnetization of ferrimagnetic sublattices. It is shown that investigated ferrimagnetic nanostructure are characterized very small times of the laser-induced remagnetization, which can attain subpicosecond scales.

Keywords:
pulsed laser radiation ferrimagnetic nanostructures magnetization reversal

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