A. Yu. Galkin, B. A. Ivanov, “Dynamics of antiferromagnets exposed to ultrashort magnetic field pulses”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2008, Volume 88, Issue 4,Pages <nobr>286

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CONDENSED MATTER

Dynamics of antiferromagnets exposed to ultrashort magnetic field pulses

A. Yu. Galkin^ab, B. A. Ivanov^c

^a Institute of Magnetism, National Academy of Sciences of Ukraine, Kiev, 03142, Ukraine
^b Institute of Metal Physics, National Academy of Sciences of Ukraine, pr. Vernadskogo 36, Kiev, 03142, Ukraine
^c Shevchenko National University, Kiev, Ukraine

Abstract: An ultrashort magnetic field pulse generated by a laser pulse can excite spin oscillations in a “pure” antiferromagnet even when a weak ferromagnetic moment is absent. This mechanism features the spin oscillation amplitude independent of the sublattice structure and parameters of the ferromagnet and is governed only by the field pulse parameters.

PACS: 75.10.Hk, 75.50.Ee, 78.47.+p

Received: 10.06.2008