Magnetocaloric piezoelectric composites for energy harvesting

Cleveland, Michael Allen; Liang, Hong

doi:10.1088/0964-1726/21/4/047002

Cited by 9 publications

(6 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[188] The miniaturization of magnetocaloric materials also allows applications in energy harvesting or hyperthermia. [189] Similar applications can be found for shape memory or magnetocaloric nanowires. However, it is possible to perform operations on a nanoscale.…”

Section: Possible Applications Of Cylindrical Heusler Micro-and Nanow...mentioning

confidence: 80%

Heusler‐Based Cylindrical Micro‐ and Nanowires

Hennel

Varga

Frolova

et al. 2022

Physica Status Solidi (a)

View full text Add to dashboard Cite

Heusler alloys present a large group of binary, [1][2][3][4][5] ternary, [6][7][8][9][10] or quaternary [11][12][13][14] compounds with a wide variety of physical properties. [15][16][17][18] Thanks to their extensive tunability [19][20][21][22] based on their chemical composition, crystal, or electronic structure, [23][24][25][26][27][28][29] they attract interest in the fundamental and application approach. [30][31][32][33][34] Particularly, spin polarization, [33,35] superconductivity, [36][37][38][39] shape memory, [40][41][42][43][44][45] or magnetocaloric behavior [28,40,[46][47][48][49][50] have triggered significant interest in the experimental and theoretical perspective.Based on the chemical composition and the resulting properties, Heusler alloys, also known as full-Heusler alloys with the stoichiometry X 2 YZ, can be divided into several groups according to their physical properties. [51] Co 2 YZ-based Heusler can be considered the leading group of materials showing high spin polarization (P) or even half metallicity (P ¼ 100%). [52][53][54][55][56][57] However, theoretical and experimental studies point to the high sensitivity of spin polarization on the structural disorder. [58] Here, the L2 1 crystalline phase exhibits the highest structural ordering, essential for achieving the required spin polarization values. [59] In contrast, while the mutual exchange of the atoms on the Y-Z position (B2 disorder) has a low influence on the spin polarization values, the X-Y or X-Y-Z disorders (D0 3 or A2, respectively) may significantly decrease spin polarization values. [55,60,61] The presented disadvantage can be solved by a suitable chemical composition or a proper method of preparation of Heusler alloys. [62,63] Stoichiometric and off-stoichiometric Ni-Mn-Z- [64][65][66] and Ni-Fe-Z-based Heusler alloys [67][68][69] are well-known magnetocaloric, shape memory, or even magnetic shape memory materials. [70,71] The mentioned Heusler alloys undergo a structural transformation from a low-temperature martensitic phase to a high-temperature austenitic phase, [51,[64][65][66][72][73][74] which may significantly influence the magnetic entropy change ΔS M and the intensity of the magnetocaloric effect. [75,76] Additionally, Heusler alloys consist of cheap elements like Ni, Fe, Mn, Co, Ga, and In, and thus may be considered low-cost counterparts for typical magnetocaloric material based on Gd, Rh, or other rare-earth elements. [77][78][79][80][81] Another advantage of the Ni-Mn-Zand Ni-Fe-Z-based Heusler alloys consists in the tunability of their structural and magnetic properties. Depending on the

show abstract

Section: Possible Applications Of Cylindrical Heusler Micro-and Nanow...mentioning

confidence: 80%

Heusler‐Based Cylindrical Micro‐ and Nanowires

Hennel

Varga

Frolova

et al. 2022

Physica Status Solidi (a)

View full text Add to dashboard Cite

show abstract

“…Cleveland and coauthors have illustrated the energy harvesting/conversion concept by producing a composite material composed of a piezoelectric (PVDF) and a magnetocaloric material (Gd 5 Si 2 Ge 2 ). 160 Even by using as small as 4 weight percent of the magnetocaloric material immersed in PVDF, the authors were able to collect 34.5 W/m 2 when the device was under a thermal cycle (from À10°C to 110°C). Shortly after, Ozaydin and coworkers found promising results also for a similar composite for the conversion magnetic-to-electrical energy, 32 as shown schematically in Fig.…”

Section: Technological Applications: Micro-and Nanodevicesmentioning

confidence: 99%

Magnetocaloric materials: From micro- to nanoscale

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Fig. 4(b) 29 Gd multilayered films; 28 or NiMnGa thin films, 34 being only lower than the epitaxial MnAs and FeRh thin films 23,26 (see supplementary material for comparative table 46 ). In comparison with the bulk GMC materials, 10 the thin film presents a lower DS mMAX .…”

mentioning

confidence: 99%

Gd5(Si,Ge)4 thin film displaying large magnetocaloric and strain effects due to magnetostructural transition

Hadimani

Silva

Pereira

et al. 2015

Applied Physics Letters

View full text Add to dashboard Cite

Magnetic refrigeration based on the magnetocaloric effect is one of the best alternatives to compete with vapor-compression technology. Despite being already in its technology transfer stage, there is still room for optimization, namely, on the magnetic responses of the magnetocaloric material. In parallel, the demand for different magnetostrictive materials has been greatly enhanced due to the wide and innovative range of technologies that emerged in the last years (from structural evaluation to straintronics fields). In particular, the Gd5(SixGe1−x)4 compounds are a family of well-known alloys that present both giant magnetocaloric and colossal magnetostriction effects. Despite their remarkable properties, very few reports have been dedicated to the nanostructuring of these materials: here, we report a ∼800 nm Gd5Si2.7Ge1.3 thin film. The magnetic and structural investigation revealed that the film undergoes a first order magnetostructural transition and as a consequence exhibits large magnetocaloric effect (−ΔSmMAX ∼ 8.83 J kg−1 K−1, ΔH = 5T) and giant thermal expansion (12000 p.p.m). The thin film presents a broader magnetic response in comparison with the bulk compound, which results in a beneficial magnetic hysteresis reduction. The ΔSmMAX exhibited by the Gd5(Si,Ge)4 thin film makes it a promising candidate for micro/nano magnetic refrigeration area.

show abstract

Magnetocaloric piezoelectric composites for energy harvesting

Cited by 9 publications

References 33 publications

Heusler‐Based Cylindrical Micro‐ and Nanowires

Heusler‐Based Cylindrical Micro‐ and Nanowires

Magnetocaloric materials: From micro- to nanoscale

Gd5(Si,Ge)4 thin film displaying large magnetocaloric and strain effects due to magnetostructural transition

Contact Info

Product

Resources

About