Analysis of magnetocaloric effect in parallel Ni-Mn-Ga Heusler alloy nanowires

The magnetocaloric effect properties for potential applications of magnetic refrigerator technology: a review

“…However, FOMT exhibits significant magnetic and thermal hysteresis, leading to losses in the performance of the MCE properties and a very narrow operating temperature range. 52,54 Examples of materials that exhibit FOMT include La(Fe,Si) 13 , 58 Gd 5 Si 2 Ge 2 , 59 MnAs 1− x Sb x , 35 Ni 65 Mn 20 Ga 15 , 28 and (Fe 0.98 Ni 0.02 ) 51 Rh 49 alloys. 34 On the other hand, if the first derivative presents a continuous curve marked by a magnetic phase transition at critical points with a broad temperature range, this behavior is known as a second-order magnetic phase transition.…”

“…1(B). To date, innovative types of materials include Heusler alloys, 28,29 LaFe 13Àx Si x alloys, [30][31][32][33] Fe-based alloys, 34 MnAs, 35 spinnel ferrites, [36][37][38] perovskite magnanites, 9,[15][16][17]27,[39][40][41] double perovskites, 19 and composite. [42][43][44] This was aimed at obtaining MCE materials with ideal criteria for magnetic refrigeration applications.…”

Pressure-freezing of dodecane: exploring the crystal structures, formation kinetics and phase diagrams for colossal barocaloric effects in n-alkanes

“…Materials which exhibit caloric effects ( i.e. reversible thermal changes) as a response to external stimuli can be generally divided into: magnetocaloric (as a response to the external magnetic field, the most widely studied by far; example materials: perovskites, 4 spinel ferrites, 5 manganese- and indium-containing glasses and alloys 5 [including nanowires 6 ] and antiferromagnets 7 ), electrocaloric (electric field; e.g. ferroelectric perovskite-type materials like PZT or BTO, 8–10 ferroelectric polymers 11,12 and their composites 13 ), mechanocaloric (mechanical strain; e.g.…”

Large rotating magnetocaloric effects in polycrystalline Ni-Mn-Ga melt-spun ribbons

“…The magnetocaloric effect (MCE) is particularly significant when the martensitic transformation and the magnetic transition temperatures are near one another, reaching its maximum [1][2][3][4]. These kinds of alloys not only have a very large magnetic-field-induced strain (MFIS), (10% in a seven-layered martensite [5] and 12% in a non-modulated martensite [6]), but also possesses other useful properties in regard to martensite phase transformation, such as their very MCE and strong magnetoresistance (MR) [7][8][9][10][11][12][13][14][15][16][17].…”

“…The researchers took special measures to characterize the deformation process both at the macroscopic and microscopic scales [28][29][30]. Researchers also working on microwires with the intention of improving their magnetic refrigeration capacity [4,31,32]. Compared to plastic deformation to form a superior orientation, the rapid quenching effect can prepare a ribbon with a distinctive texture, which could be favorable to magnetic shape memory effect (MSME).…”