论文标题
RFE0.5CR0.5O3（R = ER和YB）中的磁化效果和自旋 - 光子相关性化合物
Magnetocaloric effect and spin-phonon correlations in RFe0.5Cr0.5O3 (R = Er and Yb) compounds
论文作者
论文摘要
我们报告了我们研究混合金属氧化物RFE0.5CR0.5O3（r = ER和YB）的物理特性的结果。 ERFE0.5CR0.5O3经历了抗铁磁序，约为270 K，然后分别在150和8 K左右进行自旋重新定向（SR）过渡。相反，在YBFE0.5CR0.5O3中，单个SR过渡在36 K下，低于AFM订购温度280K。在ERFE0.5CR0.5O3中，磁熵变化的显着值（ΔSM）〜-12.4 J/kg -k在2nd sr sr prestion y tunde y tunde y但是，y ture 3 scr，y scr in y sr y scr in y in y scr y scr y scr y sude 3 scr上。 ERFE0.5CR0.5O3和YBFE0.5CR0.5O3在不同频率下的温度依赖性介电介电常数揭示了两种化合物中debye样弛豫行为的存在，这可能是由于FE和CR离子局部状态之间的托管载体跳跃的影响。温度依赖的拉曼散射研究泄露自旋 - 音波耦合在定义这些化合物的物理特性中起着至关重要的作用。
We report the results of our investigation of the physical properties of mixed metal oxides RFe0.5Cr0.5O3 (R = Er and Yb). ErFe0.5Cr0.5O3 undergoes an antiferromagnetic ordering around 270 K followed by spin reorientation (SR) transitions around 150 and 8 K respectively. In contrast, in YbFe0.5Cr0.5O3 a single SR transition is noted at 36 K, below the AFM ordering temperature of 280 K. In ErFe0.5Cr0.5O3, a significant value of magnetic entropy change (ΔSM) ~ -12.4 J/kg-K is noted near the 2nd SR transition, however, this value is suppressed in YbFe0.5Cr0.5O3. Temperature dependent dielectric permittivity of ErFe0.5Cr0.5O3 and YbFe0.5Cr0.5O3 at different frequencies, reveal the presence of Debye-like relaxation behaviour in both compounds, which can be due to the effect of charge carrier hopping between localized states of Fe and Cr ions. Temperature dependent Raman scattering studies divulge that spin-phonon coupling plays a crucial role in defining the physical properties of these compounds.
