Title: Possibility of soft-matter effects in solids
Author(s):

	H.V. Gomonay (Bogolyubov Institute for Theoretical Physics NAS of Ukraine, Metrologichna Str. 14-b, 03680, Kyiv, Ukraine; National Technical University of Ukraine "KPI", Peremogy Avenue, 37, 03056, Kyiv, Ukraine),
	I.G. Kornienko (National Technical University of Ukraine "KPI", Peremogy Avenue, 37, 03056, Kyiv, Ukraine),
	V.M. Loktev (Bogolyubov Institute for Theoretical Physics NAS of Ukraine, Metrologichna Str. 14-b, 03680, Kyiv, Ukraine)

Shape variation under the action of small external fields is a peculiar feature of soft matter. In the present paper we demonstrate a possibility of the analogous shape variation in the solids that combine the properties of antiferro- and ferromagnetic materials and show strong magnetoelastic coupling. The antiferromagnetic subsystem provides a macroscopic deformation of a sample in the external magnetic field while the ferromagnetic component ensures high susceptibility of the domain structure.

Key words: domain walls and domain structure, shape effects, thermoelasticity and electromagnetic elasticity, antiferromagnets
PACS: 75.60.Ch, 46.25.Hf, 75.50.Ee

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