填充蜂窝状反铁磁体GdInO3多晶的磁热效应
Magnetic and magnetocaloric effect in the stuffed honeycomb antiferromagnet GdInO3 polycrystalline
摘要：
研究了填充蜂窝状反铁磁体GdInO 3多晶的磁性能和磁热性能。在TN ~ 2.1K，没有观察到长程磁有序，只是磁化强度随温度的变化曲线出现了一个急剧的上升。阻挫指数值~ 5.0的大值表明该阻挫磁系统中Gd 3+磁矩之间存在短程反铁磁相互作用。可忽略的热滞回线和磁滞回线表明GdInO 3化合物具有二级相变特征和可逆磁热效应。在0-50 kOe和0-70 kOe的磁场变化范围内，在液氦温度附近，最大磁熵变值分别为9.31 J/kg K和17.53 J/kg K，对应的RCP值分别为106.61和196.38 J/kg。GdInO 3多晶的MCE性能比其他Gd基磁热效应相对较低，这可以通过该系统中的高磁阻挫来理解。我们的研究结果表明，GdInO 3多晶具有较大的可逆MCE，这不仅提供了另一种可能性，开发磁热制冷剂在挫磁系统在低温附近的温度区域，但也有助于挖掘更多的奇特性能挫填充蜂窝磁系统。
英文摘要：
The magnetic and magnetocaloric (MCE) properties were studied in a stuffed honeycomb antiferromagnet GdInO3 polycrystalline. No long-range magnetic ordering was observed with only a sharp upturn in the temperature dependent magnetization curves at TN ~ 2.1 K. The large value of frustration index value ~ 5.0 suggests short-range antiferromagnetic interactions existing between the Gd3+ moments in this frustrated magnetic system. Negligible thermal and magnetic hysteresis suggest a second-order feature of phase transition and a reversible magnetocaloric effect (MCE) in GdInO3 compound. In the magnetic field changes of 0-50 kOe and 0-70 kOe, the maximum magnetic entropy change values are 9.31 J/kg K and 17.53 J/kg K near the liquid helium temperature, with the corresponding RCP values of 106.61 and 196.38 J/kg, respectively. The relative lower MCE performance of GdInO3 polycrystalline than the other Gd-based magnetocaloric effect is understood by the high magnetic frustration in this system. Our investigation results reveal GdInO3 polycrystalline has a large reversible MCE, which not only provides another possibility of exploiting magnetocaloric refrigerants in the frustrated magnetic systems near the cryogenic temperature region, but also serves to excavate more exotic properties in the frustrated stuffed honeycomb magnetic systems.
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