Abstract Coupling effects among spin, charge, and lattice in a strongly correlated system are critical for next generation spintronic and data storage devices. However, the complex effects are elusive and difficult to distinguish their contributions to polarization modulation. Here we tailored the polarization by co-doping of non-magnetic Y and Eu at A-sites in DyMn2O5. The structure, specific heat, magnetism, and ferroelectricity of the polycrystalline Dy1-x(Eu0.24Y0.76)xMn2O5 ceramics were comprehensively explored. Interestingly, the co-doping does not cause lattice distortion of DyMn2O5, and all the ceramics are orthorhombic structures, while the independent Dy3+ spin order and the Dy3+-Mn3+ coupling can be suppressed. With increasing the co-doping content x, the spins related properties associated with the Dy3+-Mn4+-Dy3+ sub-lattice are progressively inhibited, while they keep less disturbance in the Mn3+-Mn4+-Mn3+ block. Moreover, the spin coupling of Dy3+-Mn3+ ions is stronger again the magnetic field than that of Dy3+-Mn3+. Our results enhance the understanding of ferrielectricity in DyMn2O5, and provide a method for controlling the polarization in the multiferroic manganite coexisting 3d and 4f elements.

中文翻译：

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多铁性 DyMn2O5 中的极化可调性：Y 和 Eu 共掺杂和 3d-4f 交换的影响

摘要 强相关系统中自旋、电荷和晶格之间的耦合效应对于下一代自旋电子和数据存储设备至关重要。然而，复杂的效应难以捉摸，难以区分它们对偏振调制的贡献。在这里，我们通过在 DyMn2O5 中的 A 位共掺杂非磁性 Y 和 Eu 来调整极化。综合研究了多晶Dy1-x(Eu0.24Y0.76)xMn2O5陶瓷的结构、比热、磁性和铁电性。有趣的是，共掺杂不会引起 DyMn2O5 的晶格畸变，并且所有陶瓷都是正交结构，而独立的 Dy3+ 自旋顺序和 Dy3+-Mn3+ 耦合可以被抑制。随着共掺杂量 x 的增加，与 Dy3+-Mn4+-Dy3+ 亚晶格相关的自旋相关特性逐渐被抑制，而它们在 Mn3+-Mn4+-Mn3+ 块中保持较少的干扰。此外，Dy3+-Mn3+ 离子的自旋耦合再次比Dy3+-Mn3+ 强于磁场。我们的结果增强了对 DyMn2O5 中亚铁电性的理解，并提供了一种控制多铁性锰酸盐共存 3d 和 4f 元素极化的方法。