Magnetostriction of martensite

James, Richard D.; Wuttig, Manfred

doi:10.1080/01418619808214252

Cited by 689 publications

(373 citation statements)

References 13 publications

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“…The driving force is provided by the difference between the Zeeman energies of neighboring martensite variants. 3,4 Giant strains up to 10% have been reported for off-stoichiometric Ni-Mn-Ga single variant crystals with the 14 M modulated martensitic structure. 5 Over the past decade, vast amount of knowledge accumulated on the properties of Ni-Mn-Ga Heusler alloys has enabled to foresee the possibility of employing these alloys in device applications.…”

Section: Introductionmentioning

confidence: 99%

Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

et al. 2007

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Applying a magnetic field to a ferromagnetic Ni 50 Mn 34 In 16 alloy in the martensitic state induces a structural phase transition to the austenitic state. This is accompanied by a strain which recovers on removing the magnetic field, giving the system a magnetically superelastic character. A further property of this alloy is that it also shows the inverse magnetocaloric effect. The magnetic superelasticity and the inverse magnetocaloric effect in Ni-Mn-In and their association with the first-order structural transition are studied by magnetization, strain, and neutron-diffraction studies under magnetic field.

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Section: Introductionmentioning

confidence: 99%

Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

et al. 2007

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“…Actually, similar behaviors, commonly appearing in other measurements, are believed to arise from the discontinuous structural modifications. It is also noted that the hysteresis loop of ac susceptibility commonly occurs slightly above MT, this phenomenon results possibly from the pre-martensitic transition, which could yield evident influence on the magnetic properties, and leads to the changes in intensity of the structural modulations [5,7,11].…”

mentioning

confidence: 99%

“…Among the large number of ferromagnetic Heusler alloys, the intermetallic Ni -Mn-Ga alloy is a typical one undergoing a martensitic transition (MT) at T m , 200 K; which, in our knowledge, could give rise to the maximum magnetic-field-induced strain [5][6][7][8][9][10]. In this kind of materials, experimental and theoretical investigations have been specially focused on the anomalies behavior in the ½110 -TA 2 phonon branch [11], evident structural distortions, corresponding to atomic displacements along k 2 110l direction, was identified in a large temperature range [11,12].…”

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confidence: 99%

Martensitic transition and structural modulations in the Heusler alloy Ni2FeGa

Liu

et al. 2003

Solid State Communications

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We have found two distinctive structural modulations altering evidently along with the martensitic transition (MT) in the Ni 2 FeGa alloy. The first one ðq 1 Þ; corresponding to the well-known phonon anomalies in the ½zz0 TA 2 branch, occurs along the k110l direction. The second one ðq 2 Þ; an incommensurate modulation observed for the first time, occurs along the k211l-direction. Both modulations change gradually with the premartensitic phonon softening and discontinuously with the MT. Anomalies in magnetic properties emerging around the MT have been briefly discussed. q

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“…Such materials include NiMnGa [2] and other alloys [3][4][5][6][7][8] and are produced by a large variety of techniques, such as arc melting [9], melt-spinning [10,11], sputtering [12][13][14] and Pulsed Laser Deposition (PLD) [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Magnetically Anisotropic Ni<sub>2</sub>MnGa Thin Films: Coating Glass and Si Micro-Cantilevers Substrates

Madurga

Favieres

Vergara

2009

MSF

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Abstract. Ni 2 MnGa thin films, with thickness between 30 and 60 nm, were pulsed-laser deposited at room temperature on Si micro-cantilevers and glass substrates. Two different deposition processes were performed: normal deposition and off-normal. After annealing in an inert atmosphere, in-plane isotropic magnetic hysteresis loops were measured for the normal deposited films. In contrast, in-plane anisotropic hysteresis loops were obtained from the off-normal deposited ones. An in-plane easy direction for the magnetisation, perpendicular to the incidence plane of the plasma during deposition, was measured with an anisotropy field of ≈100 Oe and an easy coercive field of ≈24 Oe. The mechanical behaviour of the magnetically anisotropic coated micro-cantilevers and their response to a decreasing temperature permitted observing the martensitic transformation of the Ni 2 MnGa thin films.

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Magnetostriction of martensite

Cited by 689 publications

References 13 publications

Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

Martensitic transition and structural modulations in the Heusler alloy Ni2FeGa

Magnetically Anisotropic Ni<sub>2</sub>MnGa Thin Films: Coating Glass and Si Micro-Cantilevers Substrates

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