Effect of Compressive Load on Magnetic Shape Memory Effect in Ni-Mn-Ga Single Crystal

• Authors: K. Richterová , J. Drahokoupil , V. Kopecký , K. Dragounová , M. Landa , O. Heczko
• Languages of publication: EN

Abstracts

EN

We investigated the effect of large compressive stress on magnetic shape memory effect in modulated 10M martensite of Ni-Mn-Ga Heusler alloy. The single crystalline sample deformed approximately elastically up to highest load 540 MPa. Structural and microstructural changes of a single crystal were analysed by X-ray diffraction 2D scan mapping in 2θ and ω. Although the crystal structure, lattice cell parameters, and twinned microstructure (a/b and modulation twinning) exhibited only small changes after the loading, the volume of the sample undergoing the magnetically induced reorientation decreased sharply while magnetic field necessary for the reorientation gradually increased. The extrapolation suggested that no magnetically induced reorientation might occur after compression of about 1 GPa.

Keywords

EN

61.05.cp; 62.40.+i; 75.50.Cc; 75.80.+q

Discipline

• 62.40.+i: Anelasticity, internal friction, stress relaxation, and mechanical resonances(for materials treatment effects on anelasticity, see 81.40.Jj in materials science)
• 61.05.cp: X-ray diffraction
• 75.50.Cc: Other ferromagnetic metals and alloys
• 75.80.+q: Magnetomechanical effects, magnetostriction(for magnetostrictive devices, see 85.70.Ec)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 4
• Pages: 704-708

Dates

published

2015-10

Contributors

author

K. Richterová

• Institute of Physics ASCR, Na Slovance 1999/2, 182 21 Praha 8, Czech Republic

author

J. Drahokoupil

• Faculty of Nuclear Sciences and Physical Engineering of CTU in Prague, Trojanova 13, 120 00 Praha 2, Czech Republic

author

V. Kopecký

• Institute of Physics ASCR, Na Slovance 1999/2, 182 21 Praha 8, Czech Republic

author

K. Dragounová

• Faculty of Nuclear Sciences and Physical Engineering of CTU in Prague, Trojanova 13, 120 00 Praha 2, Czech Republic

author

M. Landa

• Institute of Thermomechanics ASCR, Dolejškova 5, 182 00 Prague 8, Czech Republic

author

O. Heczko

• Institute of Physics ASCR, Na Slovance 1999/2, 182 21 Praha 8, Czech Republic

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Identifiers

DOI

10.12693/APhysPolA.128.704