Giant irreversibility of the inverse magnetocaloric effect in the Ni47Mn40Sn12.5Cu0.5 Heusler alloy

Kamantsev, A. P.; Koshkidko, Yu. S.; Bykov, E. O.; Gottschall, T.; Gamzatov, A. G.; Aliev, A. M.; Varzaneh, A. G.; Kameli, P.

doi:10.1063/5.0176772

Cited by 2 publications

(1 citation statement)

References 40 publications

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“…Therefore, the entropy variation as a function of temperature for the highest applied magnetic field (5 T) was 15 J/K/kg for x = 0.15 and 18 J/K/kg for x = 0.13. Furthermore, other Heusler alloys exhibit the inverse magnetocaloric effect such as Ni-Mn-In-X [87] and Ni-Mn-Sn-X [88].…”

Section: Magnetocaloric Effect In Heusler Alloysmentioning

confidence: 99%

Crystal Structure and Properties of Heusler Alloys: A Comprehensive Review

Wederni,

Daza,

Ben Mbarek

et al. 2024

Metals

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Heusler alloys, which were unintentionally discovered at the start of the 20th century, have become intriguing materials for many extraordinary functional applications in the 21st century, including smart devices, spintronics, magnetic refrigeration and the shape memory effect. With this review article, we would like to provide a comprehensive review on the recent progress in the development of Heusler alloys, especially Ni-Mn based ones, focusing on their structural crystallinity, order-disorder atoms, phase changes and magnetic ordering atoms. The characterization of the different structures of these types of materials is needed, where a detailed exploration of the crystal structure is presented, encompassing the influence of temperature and compositional variations on the exhibited phases. Hence, this class of materials, present at high temperatures, consist of an ordered austenite with a face-centered cubic (FCC) superlattice as an L21 structure, or body-centered cubic (BCC) unit cell as a B2 structure. However, a low-temperature martensite structure can be produced as an L10, 10M or 14M martensite structures. The crystal lattice structure is highly dependent on the specific elements comprising the alloy. Additionally, special emphasis is placed on phase transitions within Heusler alloys, including martensitic transformations ranging above, near or below room temperature and magnetic transitions. Therefore, divers’ crystallographic defects can be presented in such types of materials affecting their structural and magnetic properties. Moreover, an important property of Heusler compounds, which is the ability to regulate the valence electron concentration through element substitution, is discussed. The possible challenges and remaining issues are briefly discussed.

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Section: Magnetocaloric Effect In Heusler Alloysmentioning

confidence: 99%

Crystal Structure and Properties of Heusler Alloys: A Comprehensive Review

Wederni,

Daza,

Ben Mbarek

et al. 2024

Metals

View full text Add to dashboard Cite

show abstract

Microstructure, martensitic transformation kinetics, and magnetic properties of (Ni50Mn40In10)100−xCox melt-spun ribbons

Bekhouche,

Alleg,

Dadda

et al. 2024

J Therm Anal Calorim

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The effect of Co-doping on the structure, microstructure, martensitic phase transformation kinetics, and magnetic properties of the melt-spun (Ni50Mn40In10)1−xCox (x = 1, 2, and 3) Heusler ribbons, named hereafter Co1 (x = 1), Co2 (x = 2), and Co3 (x = 3), was assessed using X-ray diffraction, scanning electron microscope, energy-dispersive spectroscopy, X-ray fluorescence, differential scanning calorimetry, and vibrating sample magnetometer. The XRD results reveal the formation of a 14M martensite structure alongside the face-centered-cubic (fcc) γ phase. The crystallite size ranges between 50 and 98 nm for the 14M martensite and from 9 to 16 nm for the γ phase. The mass fraction of the γ phase lies between 36.4 and 44.2%. Co-doping affects the lattice parameters and the characteristic temperatures (martensite start, martensite finish, austenite start, and austenite finish). The calculated activation energy values for the non-isothermal martensitic transformation kinetics are 257 kJ mol−1 and 135.6 kJ mol−1 for the Co1 and Co2, respectively. The produced ribbons show a paramagnetic behavior. The variation in the coercivity can be related to the crystallite size and mass fraction of the γ phase. The produced ribbons exhibit an exchange bias at room temperature that decreases with increasing the Co content.

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Giant irreversibility of the inverse magnetocaloric effect in the Ni47Mn40Sn12.5Cu0.5 Heusler alloy

Cited by 2 publications

References 40 publications

Crystal Structure and Properties of Heusler Alloys: A Comprehensive Review

Crystal Structure and Properties of Heusler Alloys: A Comprehensive Review

Microstructure, martensitic transformation kinetics, and magnetic properties of (Ni50Mn40In10)100−xCox melt-spun ribbons

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