TY - JOUR
T1 - Magnetism and cryogenic magnetocaloric effect of triangular-lattice LnOF (Ln = Gd, Dy, Ho, and Er) compounds
AU - Gong, Jianjian
AU - Tian, Lu
AU - Zhang, Lei
AU - Mo, Zhaojun
AU - Wang, Yuanpeng
AU - Shen, Jun
N1 - Publisher Copyright:
© 2023 Chinese Society of Rare Earths
PY - 2025/1
Y1 - 2025/1
N2 - Frustrated lanthanide oxides with dense magnetic lattice and suppressed ordering temperature have potential applications in cryogenic magnetic refrigeration. Herein, the crystal structure, magnetic properties, magnetic phase transition (MPT) together with magnetocaloric effect (MCE) of LnOF (Ln = Gd, Dy, Ho, and Er) compounds were investigated. Crystallographic study shows that these compounds crystallize in the centrosymmetric space group R3¯m with an ideal triangular lattice. No long-range magnetic ordering is observed above 2 K for LnOF (Ln = Gd, Ho, and Er). However, DyOF compound undergoes an MPT from paramagnetic (PM) to antiferromagnetic (AFM) at the Néel temperature (TN ≈ 4 K). Considerable reversible MCE is observed in these triangular-lattice compounds. Under the magnetic field change (μ0ΔH) of 0–2 T, the maximum values of magnetic entropy change (-ΔSMmax) of them are 6.1, 9.4, 12.7, and 14.1 J/(kg·K), respectively. Interestingly, the value of ErOF with Ising-like spin is 2.3 times that of GdOF, which provides an approach for exploring magnetic refrigerants with excellent low-field cryogenic magnetocaloric effect.
AB - Frustrated lanthanide oxides with dense magnetic lattice and suppressed ordering temperature have potential applications in cryogenic magnetic refrigeration. Herein, the crystal structure, magnetic properties, magnetic phase transition (MPT) together with magnetocaloric effect (MCE) of LnOF (Ln = Gd, Dy, Ho, and Er) compounds were investigated. Crystallographic study shows that these compounds crystallize in the centrosymmetric space group R3¯m with an ideal triangular lattice. No long-range magnetic ordering is observed above 2 K for LnOF (Ln = Gd, Ho, and Er). However, DyOF compound undergoes an MPT from paramagnetic (PM) to antiferromagnetic (AFM) at the Néel temperature (TN ≈ 4 K). Considerable reversible MCE is observed in these triangular-lattice compounds. Under the magnetic field change (μ0ΔH) of 0–2 T, the maximum values of magnetic entropy change (-ΔSMmax) of them are 6.1, 9.4, 12.7, and 14.1 J/(kg·K), respectively. Interestingly, the value of ErOF with Ising-like spin is 2.3 times that of GdOF, which provides an approach for exploring magnetic refrigerants with excellent low-field cryogenic magnetocaloric effect.
KW - Geometric magnetic frustration
KW - Magnetic phase transition
KW - Magnetic refrigeration
KW - Magnetocaloric effect
KW - Rare earths
UR - http://www.scopus.com/inward/record.url?scp=85208686757&partnerID=8YFLogxK
U2 - 10.1016/j.jre.2023.10.005
DO - 10.1016/j.jre.2023.10.005
M3 - Article
AN - SCOPUS:85208686757
SN - 1002-0721
VL - 43
SP - 98
EP - 104
JO - Journal of Rare Earths
JF - Journal of Rare Earths
IS - 1
ER -