Eur. Phys. J. B 78, 275-282 (2010)
https://doi.org/10.1140/epjb/e2010-10475-3

Effect of B-site dopants on magnetic and transport properties of LaSrCoRuO₆

¹ Department of Physics, Goa University, Taleigao Plateau, Goa, 403 206, India
² Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400 005, India
³ Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India

Corresponding author: ^a krp@unigoa.ac.in

Received: 19 June 2010
Revised: 19 August 2010
Published online: 3 November 2010

Abstract

Effect of Co, Ru and Cu substitution at B and B' sites on the magnetic and transport properties of LaSrCoRuO₆ have been investigated. All the doped compositions crystallize in the monoclinic structure in the space group P2₁/n indicating a double perovskite structure. While the magnetization and conductivity increase in Co and Ru doped compounds, antiferromagnetism is seen to strengthen in the Cu doped samples. These results are explained on the basis of a competition between linear Co-O-Ru-O-Co and perpendicular Co-O-O-Co antiferromagnetic interactions and due to formation of Ru-O-Ru ferromagnetic networks.