Magnetic and magnetotransport properties of a0.5Sr0.5Co0.8Me0.2O3 (Me=Cr, Fe) cobaltites
Journal Title: Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej - Year 2015, Vol 8, Issue
Abstract
Magnetic and magnetotransport properties of La0.5Sr0.5Co0.8Me0.2O3 (Me = Cr, Fe) stoichiometric cobaltites has been investigated in magnetic fields up to 14 T. It is shown that doping with Fe ions changes spontaneous magnetization only slightly herewith the Curie point significantly decreases. The chromium doping leads to dramatic decrease of magnetization and the Curie point and a strong increase in magnetoresistance at low temperature. The obtained results indicate that the magnetic interactions between Co and Fe are positive whereas those between Co and Cr ions are negative. Enhancement of magnetoresistance is attributed to the magnetic field induced transition from antiferromagnetic order to ferromagnetic one.
Authors and Affiliations
Igor Troyanchuk, Maxim Bushinsky, Nina Tereshko, Vera Fedotova
Keywords
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