Publicação
The wide operating temperature range in the magnetocaloric composite formed by RMn2Si2 (R=Tm, Tb, and Dy) and HoCoSi compounds
| Resumo: | Abstract: RMn2Si2 (R = Tm, Dy, and Tb) and HoCoSi alloys, presenting multiple magnetic phase transitions (except for TmMn2Si2 and HoCoSi) and large magnetocaloric effect (MCE), were physically mixed to produce a composite magnetic refrigerant. The used concentration of each alloy was 0.1(TmMn2Si2) + 0.35(DyMn2Si2) + 0.4(TbMn2Si2) + 0.15(HoCoSi). X-ray diffraction and magnetization measurements were used to investigate the crystallographic and magnetic properties of the samples. The results indicate the maximum values of magnetic entropy change (-Delta s(M)(max)) of similar to 4.6 J/kgK undermagnetic field change (Delta H) of 50 kOe. A large table-like MCE was observed for the composite sample. The full width at half maximum of Delta S-M peak (delta T-FWHM) values reaches similar to 60.4 K (Delta H = 20 kOe) and similar to 67.2 K (Delta H = 50 kOe), which correspond to a respective. Delta S-M peak broadening of 230% and 180% for the composite sample compared with each compound studied individually. Such property is important for a material to operate in an ideal Ericsson cycle |
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| Autores principais: | Coelho, Adelino de Aguiar, 1960- |
| Outros Autores: | Cardoso, Lisandro Pavie, 1950- |
| Assunto: | Compostos intermetálicos Magnetização Efeito magnetocalórico Intermetallic compounds Magnetization Magnetocaloric effect Composite sample Table-like magnetocaloric effect Artigo original |
| Ano: | 2020 |
| País: | Brasil |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | IBICT |
| Idioma: | inglês |
| Origem: | Oasisbr |
| Resumo: | Abstract: RMn2Si2 (R = Tm, Dy, and Tb) and HoCoSi alloys, presenting multiple magnetic phase transitions (except for TmMn2Si2 and HoCoSi) and large magnetocaloric effect (MCE), were physically mixed to produce a composite magnetic refrigerant. The used concentration of each alloy was 0.1(TmMn2Si2) + 0.35(DyMn2Si2) + 0.4(TbMn2Si2) + 0.15(HoCoSi). X-ray diffraction and magnetization measurements were used to investigate the crystallographic and magnetic properties of the samples. The results indicate the maximum values of magnetic entropy change (-Delta s(M)(max)) of similar to 4.6 J/kgK undermagnetic field change (Delta H) of 50 kOe. A large table-like MCE was observed for the composite sample. The full width at half maximum of Delta S-M peak (delta T-FWHM) values reaches similar to 60.4 K (Delta H = 20 kOe) and similar to 67.2 K (Delta H = 50 kOe), which correspond to a respective. Delta S-M peak broadening of 230% and 180% for the composite sample compared with each compound studied individually. Such property is important for a material to operate in an ideal Ericsson cycle |
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