Low Temperature Physics: 40, 91 (2014); https://doi.org/10.1063/1.4865565
Fizika Nizkikh Temperatur: Volume 40, Number 2 (February 2014), p. 119-138    ( to contents , go back )

Spin dynamics of antiferromagnets under femtosecond laser pulses (Review Article)

B.A. Ivanov

Institute of Magnetism, 36-b Vernadskogo Blvd., Kyiv 03142, Ukraine
E-mail: bor.a.ivanov@gmail.com
pos Анотація:

Received August 30, 2013

Abstract

Studies into excitation of spin dynamics in transparent antiferromagnets (AFM) under the action of femtosecond laser pulses are reviewed. A variety of the effects observed up to date is considered from the unified positions. The analysis is based on the nonlinear sigma-model for antiferromagnetic vector L with taking into account the effective fields induced in the magnet due to the interaction between the light and the spin system of the magnet. Within this model the contributions of various magneto-optical effects such as the standard Faraday effect and the Cotton–Mouton (Voigt) effect or the specific L-dependent effects for AFM are considered as characteristic contributions to the effective field. The most typical experimental data for real AFM are discussed.

PACS: 75.50.Ee Antiferromagnetics;
PACS: 78.47.J– Ultrafast pump/probe spectroscopy (< 1 psec);
PACS: 75.30.Ds Spin waves;
PACS: 78.20.Ls Magneto-optical effects.

Key words: antiferromagnets, ultrafast spin dynamics, inverse Faraday effect, inverse Cotton–Mouton effect, antiferromagnetic vector, femtosecond laser pulse.

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