248 citations · 718 across the 11 of their papers we have counts for
11 papers
Atomic Topology and Magnetic Microstructure of Highly Mobile Type I and Supermobile Type II Twin Boundaries in 10M Ni-Mn-Ga Single Crystal
Ladislav Straka, Marek Vronka, Jan Maňák +3
The atomic topology and magnetic microstructure of individual, highly mobile Type I and Type II twin boundaries in 10M Ni-Mn-Ga martensite were investigated by transmission electro…
Structural and chemical disorder in NiMnGa Heusler alloy investigated by nuclear magnetic resonance
Vojtěch Chlan, Martin Adamec, Oleg Heczko
The local environment of Mn atoms in stoichiometric Ni-Mn-Ga Heusler alloys was investigated using Nuclear Magnetic Resonance (NMR) and interpreted with the help of Density Functio…
Compliant Lattice Modulations Enable Anomalous Elasticity in Ni-Mn-Ga Martensite
Kristýna Repček, Pavla Stoklasová, Tomáš Grabec +8
High mobility of twin boundaries in modulated martensites of Ni-Mn-Ga-based ferromagnetic shape memory alloys holds a promise for unique magnetomechanical applications. This featur…
Building hierarchical martensite
Stefan Schwabe, Robert Niemann, Anja Backen +7
Martensitic materials show a complex, hierarchical microstructure containing structural domains separated by various types of twin boundaries. Several concepts exist to describe th…
Nucleation and growth of hierarchical martensite in epitaxial shape memory films
Robert Niemann, Anja Backen, Sandra Kauffmann-Weiss +7
Shape memory alloys often show a complex hierarchical morphology in the martensitic state. To understand the formation of this twin-within-twins microstructure, we examine epitaxia…
Ab initio prediction of stable nanotwin double layers and 4O structure in NiMnGa
Martin Zelený, Ladislav Straka, Alexei Sozinov +1
The ab initio electronic structure calculations of the NiMnGa The alloy indicate that the orthorhombic 4O structure exhibits the lowest energy compared to all known martensit…
Thermally induced changes of structure in NiMnGa magnetic shape memory single crystals with very low twinning stress
Ladislav Straka, Jan Drahokoupil, Oliva Pacherová +4
In search for the origins of the extraordinary low twinning stress of Ni-Mn-Ga magnetic shape memory alloys we studied the thermally induced changes of structure in NiMn$_{2…
Failure of the Maxwell relation for the quantification of caloric effects in ferroic materials
Robert Niemann, Oleg Heczko, Ludwig Schultz +1
Giant caloric effects were reported in elasto-, electro- and magnetocaloric materials near phase transformations. Commonly, their entropy change is indirectly evaluated by a Maxwel…
Modulated Martensite: Why it forms and why it deforms easily
Stefan Kaufmann, Robert Niemann, Thomas Thersleff +6
Diffusionless phase transitions are at the core of the multifunctionality of (magnetic) shape memory alloys, ferroelectrics and multiferroics. Giant strain effects under external f…
Adaptive modulations of martensites
S. Kaufmann, U. K. Roessler, O. Heczko +4
Modulated phases occur in numerous functional materials like giant ferroelectrics and magnetic shape memory alloys. To understand the origin of these phases, we review and generali…
Coexistence of ferro- and antiferromagnetic order in Mn-doped NiMnGa
J. Enkovaara, O. Heczko, A. Ayuela +1
Ni-Mn-Ga is interesting as a prototype of a magnetic shape-memory alloy showing large magnetic field induced strains. We present here results for the magnetic ordering of Mn-rich N…