Journal ArticleDOI
Giant magnetic-field-induced strain in NiMnGa seven-layered martensitic phase
Reads0
Chats0
TLDR
In this paper, a magnetic-field-induced strain of about 9.5% was observed at ambient temperature in a magnetic field of less than 1 T in NiMnGa orthorhombic seven-layered martensitic phase.Abstract:
Giant magnetic-field-induced strain of about 9.5% was observed at ambient temperature in a magnetic field of less than 1 T in NiMnGa orthorhombic seven-layered martensitic phase. The strain proved to be caused by magnetic-field-controlled twin boundary motion. According to an analysis of x-ray diffraction data, the crystal structure of this phase is nearly orthorhombic, having lattice parameters a=0.619 nm, b=0.580 nm, and c=0.553 nm (in cubic parent phase coordinates) at ambient temperature. Seven-layer shuffling-type modulation along the (110)[110]p system was recorded. The results of mechanical tests and magnetic anisotropy property measurements are also reported.read more
Citations
More filters
Journal ArticleDOI
Thermal stability of the Ni54Mn25Ga21 Heusler alloy with high temperature transformation
TL;DR: In this article, Ni 54 Mn 25 Ga 21 was studied with martensitic transformation temperature higher than 250 °C and 1000 thermal cycles were performed without obvious differences of its microstructure and martenitic transformation behavior.
Book
Heusler alloys : properties, growth, applications
Claudia Felser,Atsufumi Hirohata +1 more
TL;DR: Theory of Heusler compounds and properties are discussed in detail in this paper, with a focus on the properties of new properties and applications of the heusler alloys.
Journal ArticleDOI
Experimental characterization of the sensor effect in ferromagnetic shape memory Ni-Mn-Ga
TL;DR: In this article, a commercial Ni-Mn-Ga alloy for use as a deformation sensor is addressed and the experimental determination of flux density as a function of strain loading and unloading at various fixed magnetic fields gives the bias field needed for maximum recoverable flux density change.
Book ChapterDOI
Magnetic Shape Memory Phenomena
TL;DR: In this paper, the authors described the magnetic shape memory effect in Ni-Mn-Ga alloys, which includes two different phenomena: a magnetically induced structural phase transformation (usually a martensitic transformation) and a magnetic reorientation occurring in the Martensitic phase.
Journal ArticleDOI
Anti-phase boundaries and magnetic domain structures in Ni2MnGa-type Heusler alloys
TL;DR: In this paper, the microstructure and magnetic domain structure of austenitic Heusler Ni2MnGa are investigated as a function of heat treatment to study the interplay of anti-phase boundaries and the magnetic domain walls.
References
More filters
Journal ArticleDOI
Large magnetic‐field‐induced strains in Ni2MnGa single crystals
TL;DR: In this paper, the superelastic motion of twin boundaries in the martensitic phase of Ni2MnGa with magnetic fields of 8 kOe applied at 265 K was found to be associated with the staining.
Journal ArticleDOI
6% magnetic-field-induced strain by twin-boundary motion in ferromagnetic Ni–Mn–Ga
TL;DR: In this paper, a simple model accounts quantitatively for the dependence of strain on magnetic field and external stress using as input parameters only measured quantities, and the strain versus field curves exhibit appreciable hysteresis associated with the motion of the twin boundaries.
Journal ArticleDOI
Magnetostriction of martensite
Richard D. James,Manfred Wuttig +1 more
TL;DR: In this article, a general strategy for inducing magnetostriction in ferromagnetic martensitic materials is described, and an analysis of domain redistribution caused by a magnetic field is given.
Journal ArticleDOI
Model for strain and magnetization in magnetic shape-memory alloys
TL;DR: In this paper, a simple phenomenological model for the magnetization process and field-induced strain by twin-boundary and phaseboundary motion is proposed for both the strong and weak anisotropy cases.
Journal ArticleDOI
Crystal structure of martensitic phases in Ni–Mn–Ga shape memory alloys
TL;DR: The crystal structures of the different martensitic phases observed in a wide variety of Ni-Mn-Ga alloy compositions have been studied in detail as discussed by the authors, and two approaches taken from the literature are analysed and discussed.