The magneto-caloric properties of La0.7Ca0.11Sr0.19MnO3 nanoparticles prepared by a one-step, nonaqueous synthesis

► La0.7Ca0.11Sr0.19MnO3 nanocrystals were synthesized by a simple one-step MW radiation process. ► The MW synthesis is completed in 5 min. ► La0.7Ca0.11Sr0.19MnO3 nanoparticles were prepared by using benzyl alcohol as a solvent. ► La0.7Ca0.11Sr0.19MnO3 nanoparticles show a large magneto-caloric effect at room temperature.