Journal ArticleDOI
Giant magnetic-field-induced strain in NiMnGa seven-layered martensitic phase
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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
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Temperature and magnetic-field dependence of the elastic constants of Ni-Mn-Al magnetic Heusler alloys
Xavier Moya,Lluís Mañosa,Antoni Planes,Thorsten Krenke,Mehmet Acet,Michel Morin,Jerel L. Zarestky,Thomas A. Lograsso +7 more
TL;DR: In this article, measurements of the second-order elastic constants of the Ni54Mn23Al23 single-crystalline Heusler alloy have been carried out under applied magnetic field, both isothermal and variable temperature.
Journal ArticleDOI
Anomalous magnetizations in melt spinning Ni-Mn-Ga
Jingmin Wang,Chengbao Jiang,Ratchatee Techapiesancharoenkij,David Bono,Samuel M. Allen,Robert C. O'Handley +5 more
TL;DR: In this paper, the structural and magnetic properties of Ni-Mn-Ga melt-spun ribbons of as quenched and as annealed at different temperatures were studied.
Journal ArticleDOI
Magnetic anisotropy in Ni-Fe-Ga-Co ferromagnetic shape memory alloys in the single-variant state
Haruhiko Morito,Asaya Fujita,Katsunari Oikawa,Kazuaki Fukamichi,Ryosuke Kainuma,Takeshi Kanomata,Kiyohito Ishida +6 more
TL;DR: It is evident that the magnetic anisotropy of Ni(55-x)Fe(18)Ga(27)Co(x) (x = 1-6) single-variant ferromagnetic shape memory alloys is very sensitive to Co concentration and also temperature.
Journal ArticleDOI
Giant magnetic-field-induced strain in Ni2MnGa-based polycrystal
A.A. Mendonça,J.F. Jurado,S. J. Stuard,L.E.L. Silva,G.G. Eslava,Lesley F. Cohen,Luis Ghivelder,A. M. Gomes +7 more
TL;DR: In this paper, an abrupt magnetostructural transition from a paramagnetic austenite phase to a ferromagnetic martensite one can be tuned to close to room temperature achieving large and reproducible strains.
References
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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.