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Magnetic disorder induced enhanced magneto-resistance in La0.5Sr0.5Co1−xRuxO3 |
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| Authors: | S Sundar Manoharan Ranjan K SahuD Elefant C.M Schneider |
| Affiliation: | a Materials Chemistry Laboratory, Indian Institute of Technology Kanpur, Kanpur UP-208016, India b Inter University Consortium for DAE Facilities, Mumbai Centre, Bhabha Atomic Research Centre, R-5 Shed, Mumbai 400 085, India c Institute for Solid State and Material Research, Helmholtzstrasse 20, D-01069 Dresden, Germany |
| Abstract: | We observe a sharp increase in negative magneto-resistance ratio up to 40% for x=0.1, in La0.5Sr0.5Co1−xRuxO3 which is due to the magnetic disorder induced by an anti-ferromagnetic interaction between Co and Ru ions. We also observe a metal to insulator and a ferromagnetic to anti-ferromagnetic transition for 0≤x≤0.3. Ruthenium (IV) ion disrupts an intermediate spin state of cobalt (Co3+:t2g5eg1), forcing a double exchange mediated ferromagnetic state to an anti-ferromagnetic spin state for x≥0.2. |
| Keywords: | 81.05.Je 75.10.Nr 71.20.-b |
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