International Journal of Engineering Research in Electronics and Communication Engineering

Neutron Diffraction Studies on Co and Ru based Double Perovskites

Author : P. S. Ramu Murthy ¹ K. R. Priolkar ² A. Das ³

Date of Publication :22nd November 2016

Abstract: This paper reports the neutron diffraction measurements on LaSrCoRuO6 and La2xSr2-2xCo2xRu2-2xO6. Based on these measurements, in LaSrCoRuO6, it is interpreted to be due disorder in site occupancy of Co and Ru leading to octahedral distortions and formation of the Ru-O-Ru ferromagnetic linkages which are known to align ferromagnetically. Ferromagnetic interactions are clearly seen in the disordered LaSrCoRuO6 which has a larger B-site occupancy disorder of the Co and Ru sites. In La2xSr2-2xCo2xRu2-2xO6, the compounds crystallize in the double perovskite structure. The 20K neutron data shows extra super-lattice reflections due to antiferromagnetic ordering in x = 0.75. These reflections are accounted for by an antiferromagnetic alignment of the Co and Ru spins

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