TY - JOUR
T1 - Enhanced and giant low-field magnetocaloric effects in Eu(Ti,Nb,M)O3 (M=Cu or Zn) compounds
AU - Xie, Huicai
AU - Liu, Quanyi
AU - Luo, Xiaohua
AU - Ma, Shengcan
AU - Gao, Xinqiang
AU - Li, Zhenxing
AU - Mo, Zhaojun
AU - Shen, Jun
N1 - Publisher Copyright:
© 2022
PY - 2023/1/15
Y1 - 2023/1/15
N2 - For more practical applications, research on magnetic refrigeration has been gradually focused on developing refrigerants with large magnetocaloric effect (MCE) under low magnetic fields (≤2 T). EuTiO3 exhibits considerable low-field MCE near ordering temperature, meanwhile the magnetic switch from antiferromagnetic to ferromagnetic (AFM-FM) in it provides the feasibility of improving the magnetocaloric performance. In this study, a series of Eu(Ti,Nb,M)O3 (M=Cu or Zn) compounds were synthesized, and the crystal structure, magnetic properties together with cryogenic MCEs were investigated in detail. The co-substitution contributes to an FM coupling domination in all the compounds. Besides, significantly enhanced and giant low-field MCEs were detected in these compounds. Under the field change of 1 T, all the samples possess remarkable magnetic entropy change (>15 J·kg-1·K-1) around 5 K without hysteresis. The corresponding refrigerating capacities are calculated to be 68.0, 72.6, 76.0, and 69.6 J·kg-1, respectively, exhibiting an increase of 149–178% than EuTiO3. The outstanding magnetocaloric performances make the Eu(Ti,Nb,M)O3 (M=Cu or Zn) compounds competitive candidates for cryogenic magnetic refrigeration.
AB - For more practical applications, research on magnetic refrigeration has been gradually focused on developing refrigerants with large magnetocaloric effect (MCE) under low magnetic fields (≤2 T). EuTiO3 exhibits considerable low-field MCE near ordering temperature, meanwhile the magnetic switch from antiferromagnetic to ferromagnetic (AFM-FM) in it provides the feasibility of improving the magnetocaloric performance. In this study, a series of Eu(Ti,Nb,M)O3 (M=Cu or Zn) compounds were synthesized, and the crystal structure, magnetic properties together with cryogenic MCEs were investigated in detail. The co-substitution contributes to an FM coupling domination in all the compounds. Besides, significantly enhanced and giant low-field MCEs were detected in these compounds. Under the field change of 1 T, all the samples possess remarkable magnetic entropy change (>15 J·kg-1·K-1) around 5 K without hysteresis. The corresponding refrigerating capacities are calculated to be 68.0, 72.6, 76.0, and 69.6 J·kg-1, respectively, exhibiting an increase of 149–178% than EuTiO3. The outstanding magnetocaloric performances make the Eu(Ti,Nb,M)O3 (M=Cu or Zn) compounds competitive candidates for cryogenic magnetic refrigeration.
KW - Cryogenic magnetic refrigeration
KW - EuTiO
KW - Ferromagnetic coupling
KW - Magnetocaloric effect
UR - https://www.scopus.com/pages/publications/85140057985
U2 - 10.1016/j.jallcom.2022.167623
DO - 10.1016/j.jallcom.2022.167623
M3 - Article
AN - SCOPUS:85140057985
SN - 0925-8388
VL - 932
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 167623
ER -