TY - JOUR
T1 - Magnetic performances and cryogenic magnetocaloric effects of NaREGeO4 (RE=Dy, Ho, Tb and Er) compounds
AU - Chen, Zuhua
AU - Zhang, Guochun
AU - Wang, Changkun
AU - Gao, Jiahao
AU - Zhang, Yicai
AU - Yu, Shilin
AU - Zhao, Yanan
AU - Li, Zhenxing
AU - Shen, Jun
AU - Tu, Heng
N1 - Publisher Copyright:
© 2025
PY - 2025
Y1 - 2025
N2 - Adiabatic demagnetization refrigeration (ADR) has been regarded as an alternative to helium-3-based refrigeration technology and received much attention. In this paper, NaREGeO4 (RE = Dy, Ho, Tb and Er) series compounds are prepared using the solid-state reactions, and their crystal structures, magnetic properties, and magnetocaloric effects (MCE) are studied. According to Cuire Weiss fitting, four compounds all exhibit antiferromagnetic ground states. The maximum magnetic entropy changes (-ΔSM) are calculated to be 13.76 J kg−1 K−1 (Dy: 4.5 K), 15.18 J kg−1 K−1 (Ho: 4.5 K) and 16.05 J kg−1 K−1 (Er: 3 K), which are close to their corresponding theoretical magnetic entropy evaluated by Ising spin model. For NaTbGeO4, it possesses smallest -ΔSM value of 5.91 J kg−1 K−1 due to the existence of strong short-range antiferromagnetic order. These performances suggest that NaREGeO4 compounds are promising candidates for low-temperature magnetic refrigeration applications.
AB - Adiabatic demagnetization refrigeration (ADR) has been regarded as an alternative to helium-3-based refrigeration technology and received much attention. In this paper, NaREGeO4 (RE = Dy, Ho, Tb and Er) series compounds are prepared using the solid-state reactions, and their crystal structures, magnetic properties, and magnetocaloric effects (MCE) are studied. According to Cuire Weiss fitting, four compounds all exhibit antiferromagnetic ground states. The maximum magnetic entropy changes (-ΔSM) are calculated to be 13.76 J kg−1 K−1 (Dy: 4.5 K), 15.18 J kg−1 K−1 (Ho: 4.5 K) and 16.05 J kg−1 K−1 (Er: 3 K), which are close to their corresponding theoretical magnetic entropy evaluated by Ising spin model. For NaTbGeO4, it possesses smallest -ΔSM value of 5.91 J kg−1 K−1 due to the existence of strong short-range antiferromagnetic order. These performances suggest that NaREGeO4 compounds are promising candidates for low-temperature magnetic refrigeration applications.
KW - Dy
KW - Ho
KW - Magnetic properties
KW - Magnetocaloric effects
KW - NaREGeO (RE
KW - Short-range antiferromagnetic order
KW - Tb and Er) compounds
UR - http://www.scopus.com/inward/record.url?scp=85214572662&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2025.01.061
DO - 10.1016/j.ceramint.2025.01.061
M3 - Article
AN - SCOPUS:85214572662
SN - 0272-8842
JO - Ceramics International
JF - Ceramics International
ER -