N. I. Kourov, V. G. Pushin, A. V. Korolev, V. V. Marchenkov, E. B. Marchenkova, V. A. Kazantsev, H. W. Weber, “Effect of severe plastic deformation by torsion on the properties and structure of the Ni$_{54}$Mn$_{21}$Ga$_{25}$ and Ni$_{54}$Mn$_{20}$Fe$_1$Ga$_{25}$ alloys”, Fizika Tverdogo Tela, 2011, Volume 53, Issue 1,Pages 89

This article is cited in 22 papers

Magnetism

Effect of severe plastic deformation by torsion on the properties and structure of the Ni$_{54}$Mn$_{21}$Ga$_{25}$ and Ni$_{54}$Mn$_{20}$Fe$_1$Ga$_{25}$ alloys

N. I. Kourov^a, V. G. Pushin^a, A. V. Korolev^a, V. V. Marchenkov^a, E. B. Marchenkova^a, V. A. Kazantsev^a, H. W. Weber^b

^a Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
^b Atomic Institute of the Austrain Universities, Vienna, Austria

Abstract: The effect of one-percent substitution of iron for manganese on the physical (magnetic, electrical, thermal, and galvanomagnetic) properties and the crystal structure of the Ni$_{54}$Mn$_{21}$Ga$_{25}$ alloy has been investigated. It has been demonstrated that the deviation of the alloy composition from the stoichiometric composition Ni$_{50}$Mn$_{25}$Ga$_{25}$ leads to the formation of a mixed ferromagnetic-antiferromagnetic state. The atomic disordering and nanostructuring of the alloys under investigation due to the severe plastic deformation by torsion in Bridgman anvils to sizes of 10–20 nm result in the suppression of reversible magnetically controlled shape memory effects.

Received: 18.03.2010
Accepted: 03.06.2010