Achievement of a table-like magnetocaloric effect in the dual-phase ErZn<sub>2</sub>/ErZn composite

Li, Lingwei; Yuan, Ye; Qi, Yang; Wang, Qiang; Zhou, Shengqiang

doi:10.1080/21663831.2017.1393778

Cited by 137 publications

(15 citation statements)

References 30 publications

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“…In the past decade, a large number of MCE materials have been reported [14][15][16][17][18][19][20], among which rare-earth (RE) based alloys show great significance for MR applications at cryogenic temperatures. In particular, those crystallizing in orthorhombic Ho 6 Co 2 Ga-type structures (space group Immm) could exhibit both inverse (positive ΔS iso under magnetization process) and direct MCE (negative ΔS iso under magnetization process) despite showing peculiar and complex magnetic behavior [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

et al. 2021

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Rare-earth (RE) rich intermetallics crystallizing in orthorhombic Ho6Co2Ga-type crystal structure exhibit peculiar magnetic properties that are not widely reported for their magnetic ordering, order of magnetic phase transition, and related magnetocaloric behavior. By tuning the type of RE element in RE6Co2Ga (RE = Ho, Dy or Gd) compounds, metamagnetic anti-to-paramagnetic (AF to PM) phase transitions could be tuned to ferro-to-paramagnetic (FM to PM) phase transitions. Furthermore, the FM ground state for Gd6Co2Ga is confirmed by density functional theory calculations in addition to experimental observations. The field dependence magnetocaloric and Banerjee’s criteria demonstrate that Ho6Co2Ga and Dy6Co2Ga undergo a first-order phase transition in addition to a second-order phase transition, whereas only the latter is observed for Gd6Co2Ga. The two extreme alloys of the series, Ho6Co2Ga and Gd6Co2Ga, show maximum isothermal entropy change (∣ΔS iso max (5 T)∣) of 10.1 and 9.1 J kg−1K−1 at 26 and 75 K, close to H2 and N2 liquefaction, respectively. This outstanding magnetocaloric effect performance makes the RE6Co2Ga series of potential for cryogenic magnetic refrigeration applications.

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Section: Introductionmentioning

confidence: 99%

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

et al. 2021

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“…It is also a necessary condition for scientific research to realize the development of high precision. Some materials exhibiting large −Δ S M have been found such as, TmCuAl , ErMn 2 Si 2 , ErCr 2 Si 2 and HoCoSi et al.…”

Section: Introductionmentioning

confidence: 99%

Fe doping effect on EuTiO₃: The magnetic properties and giant magnetocaloric effect

Zhang

Hao

et al. 2019

Int J Applied Ceramic Tech

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The magnetic properties and magnetocaloric effect for EuTi 1-x Fe x O 3 (x = 0.05, 0.1) compounds are investigated. When a part of Ti 4+ ions were substituted by Fe ions, the AFM ordering can be significantly changed to be FM. The EuTi 1-x Fe x O 3 (x = 0.05, 0.1) compounds exhibit a PM to FM transition with decreasing temperature and the Curie temperature is 6 K. Under the field changes of 1 T, ÀΔS M max and RC are valued to be 10.1 J/kg K and 50.2 J/kg for EuTi 0.95 Fe 0.05 O 3 ; 9.6 J/kg K and 47.7 J/kg for EuTi 0.9 Fe 0.1 O 3 , without magnetic and thermal hysteresis. RC is almost twice as much as EuTiO 3 (27 J/kg) as substitution of Fe 3+ ions for Ti 4+ ions, which may be attributed to the magnetic transition (AFM to FM). Therefore, the giant ÀΔS M max and large RC suggest the EuTi 1-x Fe x O 3 compounds are good materials for magnetic refrigerant. K E Y W O R D S magnetic entropy change, magnetic phase transformation, magnetocaloric effect

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“…Magnetic refrigeration, based on the magnetocaloric effect, is a promising technology due to its greater cooling efficiency, the possibility of building more compact (even portable) devices, and because it is environmentally friendlier than the conventional cooling processes based on the compression and expansion cycles of gas [1]. In recent years, there has been an increasing amount of investigations related to magnetocaloric materials, such as rare-earth-based intermetallic compounds [2,3,4,5,6], perovskite-type oxides [7], rare-earth cuprates [8], and others.…”

Section: Introductionmentioning

confidence: 99%

Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power

et al. 2019

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Manganites of the family La0.7Ca0.3−xSrxMnO3 were fabricated by four preparation methods: (a) the microwave-assisted sol-gel Pechini method; (b) sol-gel Pechini chemical synthesis; (c) solid-state reaction with a planetary mill; and (d) solid-state reaction with an attritor mill, in order to study the effect of the preparation route used on its magnetocaloric and magnetic properties. In addition, the manganites manufactured by the Pechini sol-gel method were compacted using Spark Plasma Sintering (SPS) to determine how the consolidation process influences its magnetocaloric properties. The Curie temperatures of manganites prepared by the different methods were determined in ~295 K, with the exception of those prepared by a solid-state reaction with an attritor mill which was 301 K, so there is no correlation between the particle size and the Curie temperature. All samples gave a positive slope in the Arrot plots, which implies that the samples underwent a second order Ferromagnetic (FM)–Paramagnetic (PM) phase transition. Pechini sol-gel manganite presents higher values of Relative Cooling Power (RCP) than the solid-state reaction manganite, because its entropy change curves are smaller, but wider, associated to the particle size obtained by the preparation method. The SPS technique proved to be easier and faster in producing consolidated solids for applications in active magnetic regenerative refrigeration compared with other compaction methods.

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Achievement of a table-like magnetocaloric effect in the dual-phase ErZn₂/ErZn composite

Cited by 137 publications

References 30 publications

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

Fe doping effect on EuTiO₃: The magnetic properties and giant magnetocaloric effect

Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power

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Achievement of a table-like magnetocaloric effect in the dual-phase ErZn2/ErZn composite

Cited by 137 publications

References 30 publications

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

First- and second-order phase transitions in RE6Co2Ga (RE = Ho, Dy or Gd) cryogenic magnetocaloric materials

Fe doping effect on EuTiO3: The magnetic properties and giant magnetocaloric effect

Preparation of La0.7Ca0.3−xSrxMnO3 Manganites by Four Synthesis Methods and Their Influence on the Magnetic Properties and Relative Cooling Power

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Achievement of a table-like magnetocaloric effect in the dual-phase ErZn₂/ErZn composite

Fe doping effect on EuTiO₃: The magnetic properties and giant magnetocaloric effect