Magnetism and ferroelectricity

Martensitic and magnetic domain structures of ferroics of the Ni–Mn–Ga and Co–Ni–Ga families

T. M. Breczko^a, R. M. Grechishkin^b, S. E. Ilyashenko^c, V. V. Nelaev^d, K. N. Dovzhik^d, O. M. Korpusov<sup>e

a</sup> University of Bialystok, Bialystok, 15-097, Poland
^b Tver State University
^c Tver State Technical University
^d Belarussian State University of Computer Science and Radioelectronic Engineering
^e Tver State Medical Academy, Tver, 170642, Russia

Abstract: The martensitic and magnetic domain structures of polycrystalline and single-crystal samples of ferromagnetic Heusler alloys of the Ni–Mn–Ga and Co–Ni–Ga families have been revealed and studied using optical microscopy. The main mechanisms of formation and interaction of 90$^\circ$C and 180$^\circ$ magnetic domains have been described.

Received: 02.04.2009
Accepted: 08.05.2009

 English version: Physics of the Solid State, 2010, 52:1, 101–104

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