Site-controlled doping of Eu3+ in SmCrO3 with modulated magnetic and dielectric properties

Doping can optimize the magnetic and dielectric properties of SmCrO3 , thereby expanding its application of electronic sensing, information storage and low-frequency capacitors. Herein, the ceramic composites of SmCrO3 , Sm1-xEuxCrO3 (x = 0.05 and 0.20) and SmCr1-yEuyO3 (y = 0.05 and 0.20) were prepared by traditional solid-state reaction. The pristine and Eu-doped SmCrO3 samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The characterization results confirm the uniform doping of Eu3+ into SmCrO3 , with all compounds exhibiting an orthorhombic structure and good crystallinity. The temperature-dependent magnetization measurements show that doping does not change the N & eacute;el temperature (TN, 197 K) and spin reorientation temperature (T-SR, 34 K) of all the Eu3+ doped SmCrO3 ceramics. Notably, the magnetization of Sm1-xEuxCrO3 (x = 0.05 and 0.20) increases with greater doping content, whereas the magnetization of SmCr1-yEuyO3 (y = 0.05, 0.20) decreases with increased doping levels. The magnetizations of the Eu3+ doped SmCrO3 samples can be tuned between 0.54 and 0.79 emu<middle dot>g(-1) under 100 K and 20 kOe. The dielectric measurements illustrate that the doped samples exhibit higher dielectric constant and lower dielectric loss than those of pristine SmCrO3 at temperatures exceeding 300 K. This work presents a straightforward method for effectively modulating the magnetic and dielectric properties of SmCrO3 .