Size effects on magnetic actuation in Ni‐Mn‐Ga shape‐memory alloys
Abstract The off‐stoichiometric Ni2MnGa Heusler alloy is a magnetic shape‐memory alloy
capable of reversible magnetic‐field‐induced strains (MFIS). These are generated by twin …
capable of reversible magnetic‐field‐induced strains (MFIS). These are generated by twin …
Ferromagnetic shape memory alloys—challenges, applications, and experimental characterization
Ferromagnetic shape memory alloys (FSMA) constitute a subgroup of shape memory alloys
(SMA) that also exhibit a ferromagnetic behavior. Due to the unique combination of large …
(SMA) that also exhibit a ferromagnetic behavior. Due to the unique combination of large …
Highly mobile twinned interface in 10 M modulated Ni–Mn–Ga martensite: Analysis beyond the tetragonal approximation of lattice
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 …
described in a tetragonal unit cell approximation of a five-layered modulated (10M) crystal …
Uncovering avalanche sources via acceleration measurements
Avalanche sources describe rapid and local events that govern deformation processes in
various materials. The fundamental differences between an avalanche source and its …
various materials. The fundamental differences between an avalanche source and its …
Modulated martensite: why it forms and why it deforms easily
S Kaufmann, R Niemann, T Thersleff… - New Journal of …, 2011 - iopscience.iop.org
Diffusionless phase transitions are at the core of the multifunctionality of (magnetic) shape
memory alloys, ferroelectrics and multiferroics. Giant strain effects under external fields are …
memory alloys, ferroelectrics and multiferroics. Giant strain effects under external fields are …
Highly mobile type II twin boundary in Ni-Mn-Ga five-layered martensite
Twin relationships and stress-induced reorientation were studied in Ni 2 Mn 1.14 Ga 0.86
single crystal with five-layered modulated martensite crystal structure. Very low twinning …
single crystal with five-layered modulated martensite crystal structure. Very low twinning …
Effect of crystal quality on twinning stress in Ni–Mn–Ga magnetic shape memory alloys
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 …
ferromagnetic martensites. We compare Ni 50 Mn 28 Ga 22 (nominal at.%) single crystals …
Temperature dependence of twinning stress of Type I and Type II twins in 10M modulated Ni–Mn–Ga martensite
We measure the temperature dependence of twinning stress in alloys with composition
between Ni50Mn28Ga22 and Ni50Mn29Ga21 in the temperature range 288–334K. For …
between Ni50Mn28Ga22 and Ni50Mn29Ga21 in the temperature range 288–334K. For …
Different microstructures of mobile twin boundaries in 10 M modulated Ni–Mn–Ga martensite
The morphology and microstructure of a single, macroscopically straight twin interface with a
twinning stress of about 1MPa was analysed in detail by differential interference contrast …
twinning stress of about 1MPa was analysed in detail by differential interference contrast …
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 …
combining ferro-elasticity and (ferro) magnetism. After short overview of all known effects the …