Pal A, Prellier W, Murugavel P
Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India.
J Phys Condens Matter. 2018 Mar 28;30(12):125801. doi: 10.1088/1361-648X/aaad3a.
The evolution of various spin structures in Yb doped GdMnO distorted orthorhombic perovskite system was investigated from their magnetic, dielectric and magnetodielectric characteristics. The Gd Yb MnO (0 ⩽ x ⩽ 0.15) revealed an enhanced magnetodielectric coupling when their magnetic structure is guided from ab to the bc-cycloidal spin structure upon Yb doping. The compounds exhibit magnetic field and temperature controlled spin-flop from c to a-axis. Additionally, magnetodielectric reversal is observed for the x = 0.1 sample which depends on both magnetic field and temperature. The resultant correlation between magnetic and electric orderings is discussed in the frame of symmetric and antisymmetric exchange interaction models. These findings provide further insight in understanding the magnetoelectric materials and importantly show a way to tune the magnetic and magnetodielectric properties towards better application potential.
通过对掺镱的GdMnO畸变正交钙钛矿体系中各种自旋结构的磁性、介电和磁电特性进行研究，探讨了其自旋结构的演变。Gd1−xYbxMnO3（0 ≤ x ≤ 0.15）在掺镱后，当磁结构从ab向bc-摆线自旋结构转变时，磁电耦合增强。这些化合物表现出磁场和温度控制的从c轴到a轴的自旋翻转。此外，对于x = 0.1的样品观察到磁电反转，其依赖于磁场和温度。在对称和反对称交换相互作用模型的框架内讨论了磁序和电序之间的相关结果。这些发现为理解磁电材料提供了进一步的见解，并且重要地展示了一种调节磁性和磁电特性以实现更好应用潜力的方法。
