TY - JOUR
T1 - Multiple transitions and wide refrigeration temperature range in R3NiSi2 (R = Tb, Dy) compounds
AU - Liu, Jun
AU - Xu, Zhiyi
AU - Xu, Jiawang
AU - Zuo, Shulan
AU - Zhang, Yan
AU - Liu, Dan
AU - Zheng, Xinqi
AU - Wang, Lichen
AU - Zhao, Tongyun
AU - Hu, Fengxia
AU - Sun, Jirong
AU - Shen, Baogen
N1 - Publisher Copyright:
© 2020
PY - 2020/5/15
Y1 - 2020/5/15
N2 - In this work, orthorhombic polycrystalline Tb3NiSi2 and Dy3NiSi2 compounds were prepared and magnetocaloric effect during multiple magnetic transitions was investigated in detail. Tb3NiSi2 compound displays four different magnetic transitions at 94 K, 115 K, 134.2 K, and 140.6 K, respectively. The maximal value of magnetic entropy change are about 4.5 J/kg K and 11.1 J/kg K at 141 K for Tb3NiSi2 compound under a field change of 0–2 T and 0–7 T, respectively. For the Dy3NiSi2 compound, three obvious magnetic transitions are found at 29.3 K, 65.4 K, and 76.6 K and the maximal value of magnetocaloric effect are about 3.6 J/kg K and 10.8 J/kg K at 77 K for a field change of 0–2 T and 0–7 T, respectively. Due to the multiple magnetic transitions, both compounds exhibit the wide refrigeration temperature range and considerable refrigerant capacity. The results reveal that the value of refrigeration temperature range and refrigerant capacity are 66.9 K and 549.1 J/kg for Tb3NiSi2 compound, and 64.0 K and 489.6 J/kg for Dy3NiSi2 compound, respectively. Therefore, R3NiSi2-family compounds have a potential application in middle temperature magnetic refrigeration.
AB - In this work, orthorhombic polycrystalline Tb3NiSi2 and Dy3NiSi2 compounds were prepared and magnetocaloric effect during multiple magnetic transitions was investigated in detail. Tb3NiSi2 compound displays four different magnetic transitions at 94 K, 115 K, 134.2 K, and 140.6 K, respectively. The maximal value of magnetic entropy change are about 4.5 J/kg K and 11.1 J/kg K at 141 K for Tb3NiSi2 compound under a field change of 0–2 T and 0–7 T, respectively. For the Dy3NiSi2 compound, three obvious magnetic transitions are found at 29.3 K, 65.4 K, and 76.6 K and the maximal value of magnetocaloric effect are about 3.6 J/kg K and 10.8 J/kg K at 77 K for a field change of 0–2 T and 0–7 T, respectively. Due to the multiple magnetic transitions, both compounds exhibit the wide refrigeration temperature range and considerable refrigerant capacity. The results reveal that the value of refrigeration temperature range and refrigerant capacity are 66.9 K and 549.1 J/kg for Tb3NiSi2 compound, and 64.0 K and 489.6 J/kg for Dy3NiSi2 compound, respectively. Therefore, R3NiSi2-family compounds have a potential application in middle temperature magnetic refrigeration.
KW - Magnetic refrigeration
KW - Magnetic transitions
KW - Magnetocaloric effect
UR - http://www.scopus.com/inward/record.url?scp=85078987266&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2020.166551
DO - 10.1016/j.jmmm.2020.166551
M3 - Article
AN - SCOPUS:85078987266
SN - 0304-8853
VL - 502
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 166551
ER -