Enhancement of refrigeration capacity and table-like magnetocaloric effect in La0.8Ca0.2MnO3/La0.8K0.2MnO3 nanocrystalline composite
Source abstract
Abstract
Abstract In this paper we report on the magnetocaloric effect and refrigeration capacity (RC) of La0.8Ca0.2MnO3(LCMO)/La0.8K0.2MnO3(LKMO) composite with a mass fraction of 1:1. X-ray diffraction patterns indicate that the component manganites crystalize in the same rhombohedral structure. The LCMO and LKMO undergo second-order phase transitions at 247 K and 281 K, respectively. The maximum values of isothermal entropy change ( − Δ S T , max ) are found to be 4.25 J/kg K and 3.71 J/kg K under a magnetic field change of 5 T for LCMO and LKMO, respectively. The composite exhibits a table-like Δ S T curve with slightly lowered peak value. An enhancement of 33%–35% for RC has been found in the composite when comparing with those of the components. It reveals that the combination of magnetocaloric materials with different Curie temperatures is a possible method for improving RC.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Thermal Expansion and Ionic Conductivity · Advanced Thermoelectric Materials and Devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (23)
Show source-provided references
1. Magnetocaloric materials
2. Reduction of hysteresis losses in the magnetic refrigerant Gd5Ge2Si2 by the addition of iron10.1038/nature02657 ↗
3. Influence of charge ordering on magnetocaloric properties of nanocrystalline Pr0.65(Ca0.7Sr0.3)0.35MnO310.1063/1.2937119 ↗
4. Tuning magnetocaloric effect with nanocrystallite size10.1063/1.3584018 ↗
5. Nanometer size effects on magnetic order in La1−xCaxMnO3 (x=0.5 and 0.6) manganites, probed by ferromagnetic resonance10.1063/1.3670059 ↗
6. Impact of reduced dimensionality on the magnetic and magnetocaloric response of La0.7Ca0.3MnO310.1063/1.4792239 ↗
7. Magnetic properties and magnetocaloric effect of La0.8Ca0.2MnO3 nanoparticles tuned by particle size10.1063/1.3699037 ↗
8. Room temperature magnetocaloric effect and refrigerant capacitance in La0.7Sr0.3MnO3 nanotube arrays10.1063/1.4894175 ↗
9. Optimization of the refrigerant capacity in multiphase magnetocaloric materials10.1063/1.3560445 ↗
10. Enhancement of the magnetocaloric effect in composites10.1016/j.ssc.2012.05.015 ↗
11. Enhanced refrigerant capacity and magnetic entropy flattening using a two-amorphous FeZrB (Cu) composite10.1063/1.3665941 ↗
12. Structural and magnetocaloric effect of Ln0.67Sr0.33MnO3 (Ln=La, Pr and Nd) nanoparticles10.1016/j.ceramint.2014.07.154 ↗
13. Large magnetic entropy change in perovskite-type manganese oxides10.1103/PhysRevLett.78.1142 ↗
14. Synthesis, structure and magnetic entropy change of polycrystalline La1−xKxMnO3+δ10.1016/S0304-8853(98)01080-4 ↗
15. On a generalised approach to first and second order magnetic transitions10.1016/0031-9163(64)91158-8 ↗
16. Critical properties of the perovskite manganite La0.1Nd0.6Sr0.3MnO310.1103/PhysRevB.81.144426 ↗
17. Universal behavior for magnetic entropy change in magnetocaloric materials10.1103/PhysRevB.81.224424 ↗
18. Analysis of the first-order phase transition of (Mn, Fe)2(P, Si, Ge) using entropy change scaling10.1088/0022-3727/46/29/295001 ↗
19. Scaling analysis of PM-FM phase transition in Nd0.5Sr0.25Ca0.25MnO3 based on magnetic entropy change10.1016/j.matchemphys.2013.12.048 ↗
20. Refrigerant capacity of FeCrMoCuGaPCB amorphous alloys10.1063/1.2358311 ↗
21. Magnetocaloric effect of perovskite manganites of La0.8A0.2MnO3 (A=Ca, Sr, Ba)10.3938/jkps.57.1893 ↗
22. Magnetocaloric effect near room temperature in (1‐y)La0.8Ca0.05K0.15MnO3/yLa0.8K0.2MnO3 composites10.1002/pssa.201300757 ↗
23. Recent developments in magnetocaloric materials10.1088/0034-4885/68/6/R04 ↗