论文标题
在三角形反铁磁铁KBAGD（BO3）2中，绝热的消除磁化冷却远低于磁性排序温度
Adiabatic demagnetization cooling well below the magnetic ordering temperature in the triangular antiferromagnet KBaGd(BO3)2
论文作者
论文摘要
据报道，据报道，据报道，据报道，晶体结构，热力学特性和绝热去磁化制冷（ADR）效应在Spin-7/2三角形抗fiferromagnet KBAGD（BO3）2中。随着平均最近的邻居交换耦合为44 MK，该化合物在$ t_n = 263 $ \，MK零字段中显示出磁性顺序。 The ADR tests reach the temperature of $T_{min} = 122$ mK, more than twice lower than $T_N$, along with the entropy storage capacity of 192 mJK$^{-1}$cm$^{-3}$ and the hold time of more than 8 hours in the PPMS setup, both significantly improved compared to the spin-1/2 Yb$^{3+}$ analog.我们认为，KBAGD（BO3）2显示了交换和偶性耦合的平衡相互作用，这些相互作用与结构的随机性和几何挫败感移动$ t_ {min} $一起远低于订购温度$ t_n $，从而促进了冷却。
Crystal structure, thermodynamic properties, and adiabatic demagnetization refrigeration (ADR) effect in the spin-7/2 triangular antiferromagnet KBaGd(BO3)2 are reported. With the average nearest-neighbor exchange coupling of 44 mK, this compound shows magnetic order below $T_N = 263$\,mK in zero field. The ADR tests reach the temperature of $T_{min} = 122$ mK, more than twice lower than $T_N$, along with the entropy storage capacity of 192 mJK$^{-1}$cm$^{-3}$ and the hold time of more than 8 hours in the PPMS setup, both significantly improved compared to the spin-1/2 Yb$^{3+}$ analog. We argue that KBaGd(BO3)2 shows a balanced interplay of exchange and dipolar couplings that together with structural randomness and geometrical frustration shift $T_{min}$ to well below the ordering temperature $T_N$, therefore facilitating the cooling.
