Role of Fe addition in Ni–Mn–Ga–Co–Cu–Fe ferromagnetic shape memory alloys for high-temperature magnetic actuation

Pérez-Checa, A.; Porro, José María; Feuchtwanger, J.; Lázpita, P.; Hansen, Thomas C.; Mondelli, C.; Sozinov, A.; Barandiarán, J.M.; Ullakko, K.; Chernenko, V.A.

doi:10.1016/j.actamat.2020.07.007

Cited by 20 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The functionality of these compounds strongly depends on the crystal structure of the martensitic phase, the transformation behavior, the magnetic and the elastic properties of the FSMAs, which are highly sensitive to the alloy composition, lattice defects and atomic ordering. This was reconfirmed recently during the development of high temperature Ni-Mn-Ga FSMAs [17,18].…”

Section: Magnetic Shape Memory Alloys Msmasmentioning

confidence: 53%

“…Since Cu tends to occupy Mn sites, Mn atoms are pushed to occupy Ga sites. As a consequence, the Curie temperature (T C ) is lowered and T M raised, so that, at 25 at.% of Cu the martensitic and magnetic transitions in Ni 2 Mn 0.75 Cu 0.25 Ga coincide at 317 K. Pérez-Checa et al [18] examined by neutrons a set of six Ni-Mn-Ga-Co-Cu-Fe high temperature FSMAs to disclose the influence of Fe doping on the evolution of atoms distribution within the unit cell of the crystal lattice and to correlate the Fe-triggered atomic redistribution with their magnetic properties. They found that the Fe increase provokes an enhancement of the ferromagnetically coupled Mn-Mn pairs at the expense of the antiferromagnetic ones, leading to an increase of the total magnetic moment of the alloy, in agreement with magnetometry measurements on the alloys.…”

Section: Powder Neutron Diffractionmentioning

confidence: 99%

See 1 more Smart Citation

Neutron Scattering as a Powerful Tool to Investigate Magnetic Shape Memory Alloys: A Review

Río-López

Lázpita

Salazar

et al. 2021

Metals

Self Cite

View full text Add to dashboard Cite

Magnetic shape memory alloys (MSMAs) are an interesting class of smart materials characterized by undergoing macroscopic deformations upon the application of a pertinent stimulus: temperature, stress and/or external magnetic fields. Since the deformation is rapid and contactless, these materials are being extensively investigated for a plethora of applications, such as sensors and actuators for the medical, automotive and space industries, energy harvesting and damping devices, among others. These materials also exhibit a giant magnetocaloric effect, whereby they are very promising for magnetic refrigeration. The applications in which they can be used are extremely dependent on the material properties, which are, in turn, greatly conditioned by the structure, atomic ordering and magnetism of a material. Particularly, exploring the material structure is essential in order to push forward the current application limitations of the MSMAs. Among the wide range of available characterization tools, neutron scattering techniques stand out in acquiring advanced knowledge about the structure and magnetism of these alloys. Throughout this manuscript, a comprehensive review about the characterization of MSMAs using neutron techniques is presented. Several elastic neutron scattering techniques will be explained and exemplified, covering neutron imaging techniques—such as radiography, tomography and texture diffractometry; diffraction techniques—magnetic (polarized neutron) diffraction, powder neutron diffraction and single crystal neutron diffraction, reflectometry and small angle neutron scattering. This will be complemented with a few examples where inelastic neutron scattering has been employed to obtain information about the phonon dispersion in MSMAs.

show abstract

Section: Magnetic Shape Memory Alloys Msmasmentioning

confidence: 53%

Section: Powder Neutron Diffractionmentioning

confidence: 99%

Neutron Scattering as a Powerful Tool to Investigate Magnetic Shape Memory Alloys: A Review

Río-López

Lázpita

Salazar

et al. 2021

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…[113] Thus, a more promising approach appeared to be alloying with combinations of transition metals. [114,115] At the same time, however, adding more than 5 at% of transitional metals often results in the precipitation of secondary phases or the unwanted prevalence of the NM structure.…”

Section: Search For the Ground State Of Ni 2 Mngamentioning

confidence: 99%

“…There have also been attempts to use neutron diffraction, but the results have been rather ambiguous, as the interpretation relies on heavy assumptions. [115,167] In contrast, solving such problems appears to be a routine task for ab initio calculations, as it can be accomplished simply by comparing the total energies of all possible configurations. Such CPA-based analyses are available for off-stoichiometric alloys, [154] as well as alloys with additional Fe, Co, Cu, [155] Al, [168] and Zn.…”

Section: Search For the Ground State Of Ni 2 Mngamentioning

confidence: 99%

Experimental Observations versus First‐Principles Calculations for Ni–Mn–Ga Ferromagnetic Shape Memory Alloys: A Review

Seiner

Zelený

Sedlák

et al. 2022

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

This review summarizes recent advances in first‐principles simulations of the structural, mechanical, and magnetomechanical properties of Ni–Mn–Ga‐based ferromagnetic shape memory alloys from the perspective of experimental characterization. It focuses on calculations that can capture the main features of the low‐temperature phases, particularly the appearance of spatial modulations, the occurrence of intermartensitic transitions, and the high mobility of the twin boundaries, which allows for magnetically induced reorientation. Although the calculations can only be used to interpret some of these features and are not yet ready to be used as a tool for designing new alloys with the required properties, the gap between experimental observations and simulations is narrowing. When experiments and theory are discussed together, new challenges arise for both. In addition, new results on first‐principles‐determined elastic constants of the 10M martensite of Ni–Mn–Ga are presented and discussed with respect to the high mobility of the twin boundaries.

show abstract

“…Pérez-Checa et al [ 23 ] studied the role played by Fe added to the Ni 45 Mn 25 Ga 20 Co 5 Cu 5 shape memory alloy (SMA) in high temperature actuators. The authors observed that the addition of 5 at% of Fe led to the most promising candidate, with both high TMT and Curie (T c ) temperatures and a low c/a tetragonal ratio.…”

Section: Introductionmentioning

confidence: 99%

Elastocaloric Properties of Polycrystalline Samples of NiMnGaCu Ferromagnetic Shape Memory Alloy under Compression: Effect of Improvement of Thermoelastic Martensitic Transformation

Villa

Bestetti²,

Frigerio³

et al. 2022

Materials

View full text Add to dashboard Cite

Shape memory alloys (SMAs) and ferromagnetic shape memory alloys (FeSMAs) have recently attracted interest for solid state refrigeration applications. Among NiMnGa-based quaternary systems, NiMnGaCu exhibits an interesting giant magnetocaloric effect thanks to the overlapping of the temperatures related to the magnetic transition and the thermoelastic martensitic transformation (TMT); in particular, for compositions with Cu content of approximately 6 at%. In the present work, we investigated the improvement effect of TMT on the total entropy change (DS) in the elastocaloric performances of polycrystalline Ni50Mn18.5Cu6.5Ga25 at% alloy samples, just above room temperature. We report an extensive calorimetric and thermomechanical characterization to explore correlations between microstructural properties induced by the selected thermal treatment and elastocaloric response, aiming at providing the basis to develop more efficient materials based on this quaternary system. Both DT and DS values obtained from mechanical curves at different temperatures and strain recovery tests under fixed load vs T were considered. Maximum values of DS = 55.9 J/KgK and DT = 4.5 K were attained with, respectively, a stress of 65 MPa and strain of 4%. The evaluation of the coefficient of performance (COP) was carried out from a cyclic test.

show abstract

Role of Fe addition in Ni–Mn–Ga–Co–Cu–Fe ferromagnetic shape memory alloys for high-temperature magnetic actuation

Cited by 20 publications

References 34 publications

Neutron Scattering as a Powerful Tool to Investigate Magnetic Shape Memory Alloys: A Review

Neutron Scattering as a Powerful Tool to Investigate Magnetic Shape Memory Alloys: A Review

Experimental Observations versus First‐Principles Calculations for Ni–Mn–Ga Ferromagnetic Shape Memory Alloys: A Review

Elastocaloric Properties of Polycrystalline Samples of NiMnGaCu Ferromagnetic Shape Memory Alloy under Compression: Effect of Improvement of Thermoelastic Martensitic Transformation

Contact Info

Product

Resources

About