Shape memory effect due to magnetic field-induced thermoelastic martensitic transformation in polycrystalline Ni–Mn–Fe–Ga alloy

Cherechukin, A. A.; Dikshteǐn, I. E.; Ermakov, D.I.; Glebov, A. V.; Коледов, В. В.; Kosolapov, D.A.; Шавров, В. Г.; Tulaikova, A. A.; Krasnoperov, E. P.; Takagi, Toshiyuki

doi:10.1016/s0375-9601(01)00688-0

Cited by 131 publications

(91 citation statements)

References 20 publications

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“…1). Among ferromagnetic shape memory alloys, the largest magneticfield-induced strains arising from conversion of martensitic variants under action of a magnetic field 2,3) or caused by the shift of the martensitic transition temperature 4,5) have been observed in the most intensively studied Ni 2 MnGa alloy system. Ni 2 MnGa is a representative of Mn-containing Heusler alloys.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fe and Co on Phase Transitions in Ni-Mn-Ga Alloys

et al. 2003

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Differential scanning calorimetry (DSC) and magnetic measurements were performed to study the influence of ferromagnetic 3-d transition elements Fe and Co on structural and magnetic properties of ferromagnetic shape memory alloys Ni 2 MnGa. Addition of Fe or Co on the Ni sites decreases the temperature of martensitic phase transition T m , whereas addition of Co on the Mn sites results in a considerable increase of T m . Magnetic measurement revealed that Curie temperature T C increases upon substitution of Fe or Co for Ni. This observation is of importance for design of high temperature ferromagnetic shape memory alloys.

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Section: Introductionmentioning

confidence: 99%

Influence of Fe and Co on Phase Transitions in Ni-Mn-Ga Alloys

et al. 2003

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“…By analogy with [7], we introduce the following kinematic equation: To describe the rate of change in the phase strains (without regard to reversible shape memory effect of reverse transformation), we use the equations that were proposed for small strains in [9]. In the present study these relations are generalized to finite strains, ( 2 ) where 0 is mass density in the initial configurations, is the Helmholtz free energy per unit mass, s is entropy, q is heat flux vector and ~ is the Hamiltonian operator in the current configuration. Substituting the expression for the free energy )…”

Section: Phase Transition In the Shape Memory Alloysmentioning

confidence: 99%

“…To verify the model, we used the experimental data found in [2], where the possibility of magnetic control by the shape memory effect was analyzed. The austenite-to-martensite phase transition in the specimen made of a polycrystalline Ni-Mn-Fe-Ga alloy was realized at a fixed external temperature due to a shift of specific phase transition temperature induced by the magnetic field.…”

Section: Model Verificationmentioning

confidence: 99%

“…The combination of ferromagnetic properties and a structural (martensitic) phase transition from the hightemperature cubic phase (austenite) to the tetragonal low-temperature phase (martensite) makes this alloy promising in the search for the possibility of controlling the shape of a sample by varying temperature, pressure, and external magnetic field [1]. With the help of the magnetic field, the phase transition process can be effectively controlled, and this was evidenced by experimental studies [2,3]. If the direct or reverse phase transitions in the ferromagnetic material are realized under the action of the magnetic field, the specific temperatures of the process change according to the generalized Clausius-Clapeyron law and depend on the magnetic and stress fields.…”

Section: Introductionmentioning

confidence: 99%

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Modeling the magnetic field control of phase transition in ferromagnetic shape memory alloys

Rogovoy¹,

Stolbova²

2016

AIP Conference Proceedings

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“…6) Recent researches on the Ni 2 MnGa showed that large magnetic-field-induced strains can be generated either by re-orientation of martensitic variants 7,8) or by shifting the martensitic transformation temperature. 9,10) If the SME appears under magnetic field, its response will be faster than that of thermal one.…”

Section: Introductionmentioning

confidence: 99%

Magnetic-Field Induced Two-Way Shape Memory Effect of Ferromagnetic Ni<SUB>2</SUB>MnGa Sputtered Films

et al. 2006

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The shape memory effect (SME) induced by the magnetic field is interesting and important for physics and application. The ferromagnetic Ni 2 MnGa films with various compositions were deposited on a poly-vinyl alcohol (PVA) substrate with a radio-frequency (RF) magnetron sputtering apparatus using four kinds of Ni-Mn-Ga targets. After separating from the substrate, the films were heat-treated at 1073 K for 3.6 ks for homogenization and aged at 673 K for 3.6 ks in a constraint condition. The reversible two-way SME by the thermal change was confirmed for the constraint-aged films with various compositions. The gradient of the strain-temperature curve, the amount of strain accompanied by the twoway SME and the width of thermal hysteresis were dependent on the composition of the films. The strain-temperature curve shifted to a high temperature region and the martensitic phase was stabilized by the applied magnetic field. Furthermore, the two-way SME by the magnetic field was observed around the martensitic transformation temperature on cooling for the constraint-aged film, which showed the large gradient and small thermal hysteresis in the strain-temperature curve.

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Shape memory effect due to magnetic field-induced thermoelastic martensitic transformation in polycrystalline Ni–Mn–Fe–Ga alloy

Cited by 131 publications

References 20 publications

Influence of Fe and Co on Phase Transitions in Ni-Mn-Ga Alloys

Influence of Fe and Co on Phase Transitions in Ni-Mn-Ga Alloys

Modeling the magnetic field control of phase transition in ferromagnetic shape memory alloys

Magnetic-Field Induced Two-Way Shape Memory Effect of Ferromagnetic Ni<SUB>2</SUB>MnGa Sputtered Films

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