TY - JOUR
T1 - Improvement of the low-field-induced magnetocaloric effect in EuTiO3compounds
AU - Zeng, Shuang
AU - Jiang, Wen Hao
AU - Yang, Hui
AU - Mo, Zhao Jun
AU - Shen, Jun
AU - Li, Lan
N1 - Publisher Copyright:
© 2020 Chinese Physical Society and IOP Publishing Ltd.
PY - 2020/12
Y1 - 2020/12
N2 - The magnetocaloric effect of Mn, Ni, and Mn-Ni-doped EuTiO3 compounds are studied in the near-liquid-helium-temperature range. The Eu(Ti0.9375Mn0.0625)O3, Eu(Ti0.975Ni0.025)O3, and Eu(Ti0.9125Mn0.0625Ni0.025)O3 are prepared by the sol-gel method. The Eu(Ti0.9375Mn0.0625)O3 and Eu(Ti0.9125Mn0.0625Ni0.025)O3 exhibit ferromagnetism with second-order phase transition, and the Eu(Ti0.975Ni0.025)O3 displays antiferromagnetic behavior. Under the magnetic field change of 10 kOe (1 Oe = 79.5775 A⋅m-1), the values of magnetic entropy change are 8.8 J⋅kg-1⋅K-1, 12 J⋅kg-1⋅K-1, and 10.9 J⋅kg-1⋅K-1 for Eu(Ti0.9375Mn0.0625)O3, Eu(Ti0.975Ni0.025)O3, and Eu(Ti0.9125Mn0.0625Ni0.025)O3, respectively. The co-substitution of Mn and Ni can not only improve the magnetic entropy change, but also widen the refrigeration temperature window, which greatly enhances the magnetic refrigeration capacity. Under the magnetic field change of 10 kOe, the refrigerant capacity value of Eu(Ti0.9125Mn0.0625Ni0.025)O3 is 62.6 J⋅kg-1 more than twice that of EuTiO3 (27 J⋅kg-1), indicating that multi-component substitution can lead to better magnetocaloric performance.
AB - The magnetocaloric effect of Mn, Ni, and Mn-Ni-doped EuTiO3 compounds are studied in the near-liquid-helium-temperature range. The Eu(Ti0.9375Mn0.0625)O3, Eu(Ti0.975Ni0.025)O3, and Eu(Ti0.9125Mn0.0625Ni0.025)O3 are prepared by the sol-gel method. The Eu(Ti0.9375Mn0.0625)O3 and Eu(Ti0.9125Mn0.0625Ni0.025)O3 exhibit ferromagnetism with second-order phase transition, and the Eu(Ti0.975Ni0.025)O3 displays antiferromagnetic behavior. Under the magnetic field change of 10 kOe (1 Oe = 79.5775 A⋅m-1), the values of magnetic entropy change are 8.8 J⋅kg-1⋅K-1, 12 J⋅kg-1⋅K-1, and 10.9 J⋅kg-1⋅K-1 for Eu(Ti0.9375Mn0.0625)O3, Eu(Ti0.975Ni0.025)O3, and Eu(Ti0.9125Mn0.0625Ni0.025)O3, respectively. The co-substitution of Mn and Ni can not only improve the magnetic entropy change, but also widen the refrigeration temperature window, which greatly enhances the magnetic refrigeration capacity. Under the magnetic field change of 10 kOe, the refrigerant capacity value of Eu(Ti0.9125Mn0.0625Ni0.025)O3 is 62.6 J⋅kg-1 more than twice that of EuTiO3 (27 J⋅kg-1), indicating that multi-component substitution can lead to better magnetocaloric performance.
KW - magnetic entropy change
KW - magnetic phase transformation
KW - magnetocaloric effect
UR - http://www.scopus.com/inward/record.url?scp=85098521795&partnerID=8YFLogxK
U2 - 10.1088/1674-1056/abb230
DO - 10.1088/1674-1056/abb230
M3 - Article
AN - SCOPUS:85098521795
SN - 1674-1056
VL - 29
JO - Chinese Physics B
JF - Chinese Physics B
IS - 12
M1 - 127501
ER -