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
Ab initio study of effect of Co substitution on the magnetic properties of Ni and Pt-based Heusler alloys
TL;DR: In this paper, the effect of Co substitution on the magnetic properties of Ni and Pt-based shape memory alloys was investigated using density functional theory based calculations, and a detailed analysis of evolution of Heisenberg exchange coupling parameters as a function of Co doping was presented.
Characterization and modeling of ferromagnetic shape memory Ni-Mn-Ga in a collinear stress-field configuration
TL;DR: In this paper, the authors investigated the behavior of Ni50Mn28.7Ga21.3 in a unique configuration in which a magnetic field produced by a solenoid is applied along the axis of a cylindrical rod and the strain is measured collinearly to the field while axial loads are applied.
Journal ArticleDOI
Theoretical study and numerical simulations on the stress-induced twin interface nucleation in single-crystalline NiMnGa alloys
Jiong Wang,Ping Du +1 more
TL;DR: In this article, the stress-induced twin interface nucleation in single-crystalline NiMnGa alloys is studied through theoretical analyses and numerical simulations, and a practical scheme for predicting the twin interfaces nucleation is proposed.
Journal ArticleDOI
Microstructure and Phase Evolution of Ni2FeGa Heusler Alloy Extended to Different Degrees of Undercooling
TL;DR: In this paper, the phase identification and microstructural characterization of Ni2FeGa Heusler alloy was carried out using XRD, SEM and TEM, and the results indicated that γ-phase was the primary phase to form.
Journal ArticleDOI
Evolution of phase transformation and magnetic properties with Fe content in Ni55−x Fe x Mn20Ga25 Heusler alloys
TL;DR: In this article, a series of Ni55−x Fe x Mn20Ga25 (0 ≤ x ≤ 5) Heusler alloys was prepared to investigate their phase transitions and magnetic properties.
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.