A sonochemical-assisted synthesis and annealing temperature effect of La0.7Sr0.3MnO3 nanoparticles

作者：Van Cuong Phan; Dho Joonghoe; Park Hyo Yeol; Kim Do Hyung^*

来源：Applied Physics A-Materials Science & Processing, 2009, 95(2): 567-571.

DOI：10.1007/s00339-008-4952-x

This paper reports on the sonochemical-assisted synthesis of La0.7Sr0.3MnO3 (LSMO) nanoparticles (NPs) which have a single-crystalline perovskite structure. The average particle size of LSMO NPs was controlled from about 40 to 120 nm by changing the annealing temperatures from 750 to 1050A degrees C. The particle size, electrical resistivity, and ferromagnetic transition temperature of LSMO NPs were strongly dependent on the annealing temperature. A substantial decrease in resistivity and an enhancement in the insulator-metal transition temperature were found on increasing the annealing temperature. Furthermore, the enhancement in magnetization and paramagnetic-ferromagnetic (PM-FM) transition temperatures was observed as the annealing temperature increases.

• 出版日期2009-5