Magnetic shape memory effect and highly mobile twin boundaries

O Heczko - Materials Science and Technology, 2014 - journals.sagepub.com
The magnetic shape memory effect can be classified as an example of the multiferroic effect
combining ferro-elasticity and (ferro) magnetism. After short overview of all known effects the …

Highly mobile twinned interface in 10 M modulated Ni–Mn–Ga martensite: Analysis beyond the tetragonal approximation of lattice

L Straka, O Heczko, H Seiner, N Lanska, J Drahokoupil… - Acta Materialia, 2011 - Elsevier
The huge strains that Ni–Mn–Ga magnetic shape memory alloys can achieve are usually
described in a tetragonal unit cell approximation of a five-layered modulated (10M) crystal …

Adaptive modulations of martensites

S Kaufmann, UK Rößler, O Heczko, M Wuttig… - Physical Review Letters, 2010 - APS
Modulated phases occur in numerous functional materials like giant ferroelectrics and
magnetic shape-memory alloys. To understand the origin of these phases, we employ and …

Coupling between ferromagnetic and ferroelastic transitions and ordering in Heusler alloys produces new multifunctionality

O Heczko, H Seiner, S Fähler - MRS Bulletin, 2022 - Springer
The ability of Heusler alloys to accommodate broad variations of composition, doping, and
ordering provides multiple options for tailoring their ferromagnetic and ferroelastic …

Microstructure engineering of metamagnetic Ni-Mn-based Heusler compounds by Fe-doping: A roadmap towards excellent cyclic stability combined with large …

L Pfeuffer, J Lemke, N Shayanfar, S Riegg, D Koch… - Acta Materialia, 2021 - Elsevier
Ni-Mn-based metamagnetic shape-memory alloys exhibit a giant thermal response to
magnetic fields and uniaxial stress which can be utilized in single caloric or multicaloric …

Crystal structure of 7M modulated Ni–Mn–Ga martensitic phase

L Righi, F Albertini, E Villa, A Paoluzi, G Calestani… - Acta Materialia, 2008 - Elsevier
For the first time, the 7M modulated structure, frequently observed in ferromagnetic shape
memory Ni–Mn–Ga martensitic phases, is solved by powder diffraction analysis. Two …

Nanoscale Skyrmions in a Nonchiral Metallic Multiferroic: Ni2MnGa

C Phatak, O Heinonen, M De Graef, A Petford-Long - Nano letters, 2016 - ACS Publications
Magnetic skyrmions belong to a set of topologically nontrivial spin textures at the nanoscale
that have received increased attention due to their emergent behavior and novel potential …

Composition-dependent crystal structure and martensitic transformation in Heusler Ni–Mn–Sn alloys

H Zheng, W Wang, S Xue, Q Zhai, J Frenzel, Z Luo - Acta Materialia, 2013 - Elsevier
In the present work, modulated four-and five-layered orthorhombic, seven-layered
monoclinic (4O, 10M and 14M) and unmodulated double tetragonal (L10) martensites are …

Ni-Mn-Ga micro-trusses via sintering of 3D-printed inks containing elemental powders

SL Taylor, RN Shah, DC Dunand - Acta Materialia, 2018 - Elsevier
Abstract Ni-Mn-Ga magnetic shape memory alloy (SMA) micro-trusses, suitable for high
magnetic field induced strains and/or a large magnetocaloric effect, are created via a new …

Effect of crystal quality on twinning stress in Ni–Mn–Ga magnetic shape memory alloys

D Musiienko, F Nilsén, A Armstrong, M Rameš… - Journal of Materials …, 2021 - Elsevier
Low twinning stress (TS) is a prerequisite for magnetic shape memory functionality in
ferromagnetic martensites. We compare Ni 50 Mn 28 Ga 22 (nominal at.%) single crystals …