Abstract The effects of B-site Vanadium (V) doping on the structural, magnetic and magnetocaloric properties of double perovskite compound Ba2FeMoO6 were investigated. The Ba2FeMo1-xVxO6 (0.0 ≤ x ≤ 0.4) samples were synthesized using the conventional solid state reaction method and were observed to crystallize in the cubic phase with space group Fm-3m using the X-ray diffraction pattern of the material. The temperature dependent as well as the isothermal magnetization data confirmed the ferromagnetic behavior of the samples. The second order magnetic phase transition of all the samples were established using the Arrott plots analysis. The highest spontaneous magnetization was found to be 34.76 emu/g at 100 K with a sharp magnetic transition behavior near transition temperature (TC) = 315 K for pristine Ba2FeMoO6 (BFMO) sample. TC approached near room temperature (≈300 K) followed by a reduction in the spontaneous magnetization values on the partial substitution of Mo with V. Our findings in this work suggest that the magnetic and magnetocaloric behavior of the double perovskite Ba2FeMoO6 can be tailored through the controlled partial substitution at B-site. The B-site doping in these perovskite compounds can effectively tune the physical properties and the technological potential in numerous fields can be foreseen.

中文翻译：

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B位钒（V）掺杂对Ba2FeMo1-xVxO6钙钛矿结构、磁性和磁热性能的影响

摘要 研究了 B 位钒 (V) 掺杂对双钙钛矿化合物 Ba2FeMoO6 的结构、磁性和磁热性能的影响。Ba2FeMo1-xVxO6 (0.0 ≤ x ≤ 0.4) 样品使用常规固相反应方法合成，并使用材料的 X 射线衍射图观察到在立方相中结晶，空间群为 Fm-3m。温度相关以及等温磁化数据证实了样品的铁磁行为。所有样品的二阶磁相变都是使用阿罗特图分析建立的。发现最高自发磁化强度在 100 K 时为 34.76 emu/g，对于原始 Ba2FeMoO6 (BFMO) 样品，在转变温度 (TC) = 315 K 附近具有明显的磁转变行为。TC 接近室温（≈300 K），随后在用 V 部分取代 Mo 时自发磁化值降低。我们在这项工作中的发现表明，双钙钛矿 Ba2FeMoO6 的磁性和磁热行为可以通过B 位点的受控部分取代。这些钙钛矿化合物中的 B 位掺杂可以有效地调整物理性质，并且可以预见许多领域的技术潜力。