We report the structural, magnetic and magnetocaloric properties of Sr1.8Pr0.2FeMo1-xWxO6(0.0 ≤ x ≤ 0.4) samples prepared by the conventional solid state reaction method. The X-ray diffraction analysis confirms the formation of the tetragonal double perovskite structure with a I4/mmm space group in all the synthesized samples. The temperature dependent magnetization measurements reveal that all the samples go through a ferromagnetic to paramagnetic phase transition with an increasing temperature. The Arrott plot obtained for each synthesized sample demonstrates the second order nature of the magnetic phase transition. A magnetic entropy change is obtained from the magnetic isotherms. The values of maximum magnetic entropy change and relative cooling power at an applied field of 2.5 T are found to be 0.40 Jkg−1K−1 and 69 Jkg−1 respectively for the Sr1.8Pr0.2FeMoO6 sample. The tunability of magnetization and excellent magnetocaloric features at low applied magnetic field make these materials attractive for use in magnetic refrigeration technology.

Abstract
 1. Introduction
 2. Experimental Procedure
 3. Results and Discussion
 4. Conclusions
 References

• Imad Hussain(School of Materials Science and Engineering, Changwon National University)
• Mohammad Shafique Anwar(School of Materials Science and Engineering, Changwon National University, Department of Kulliyat, A. K. T. College, Aligarh Muslim University)
• Saima Naz Khan(Department of Physics, Abdul Wali Khan University Mardan)
• Chan Gyu Lee(School of Materials Science and Engineering, Changwon National University)
• Bon Heun Koo(School of Materials Science and Engineering, Changwon National University) Corresponding author