Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5491834 | Physica B: Condensed Matter | 2017 | 12 Pages |
Abstract
Magnetic and magnetotransport properties of La0.7Sr0.3Mn1âxCoxO3 ceramics have been investigated by neutron powder diffraction, magnetization and electrical measurements. It is shown that substitution by cobalt ions leads to a decrease of magnetic transition temperature down to 140Â K for the compound with x = 0.33. The compounds with cobalt content 0.4 < x < 0.6 are characterized by a presence of small ferromagnetic component due to exchange interactions between cobalt and manganese ions with maximal transition temperature of about 190Â K observed for x = 0.5. Further increase of the dopant concentration diminishes ferromagnetic interactions. An evolution of electronic configuration of manganese and cobalt ions upon chemical substitution as well as related changes in the exchange interactions which determine the type of the magnetic state are discussed. Based on the neutron diffraction results and magnetometry data the preliminary magnetic phase diagram has been constructed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
I.O. Troyanchuk, D.V. Karpinsky, M.V. Bushinsky, V.V. Sikolenko, S.A. Gavrilov, M.V. Silibin,