Publication Date:
2019
Description:
〈h3〉Abstract〈/h3〉
〈p〉In this study, the effect of oxygen vacancies on structural and magnetic properties of La〈sub〉1.9〈/sub〉Sr〈sub〉0.1〈/sub〉CoMnO〈sub〉6〈/sub〉 (LSCMO) films deposited on Si (100) substrate was investigated by varying the oxygen partial pressure during film growth, by pulsed laser deposition. The Rietveld refinement manifest the monoclinic phase (with space group P21/n) of the bulk La〈sub〉1.9〈/sub〉Sr〈sub〉0.1〈/sub〉CoMnO〈sub〉6〈/sub〉 sample. A shift in ferromagnetic (FM) phases (〈em〉T〈/em〉〈sub〉c〈/sub〉) are obtained in both the LSCMO films from that of the bulk La〈sub〉1.9〈/sub〉Sr〈sub〉0.1〈/sub〉CoMnO〈sub〉6〈/sub〉 sample confirmed by a magnetic measurement. The oxygen vacancies, observed through X-ray photoelectron spectroscopy (XPS) measurement, can induce the local vibronic Mn〈sup〉3+〈/sup〉–O–Mn〈sup〉3+〈/sup〉 superexchange interactions in direct competition with static ferromagnetic Mn〈sup〉4+〈/sup〉–O–Mn〈sup〉4+〈/sup〉 interactions. In this paper, attempts have been made to tune the magnetic phases by controlling the oxygen vacancies.〈/p〉
Print ISSN:
0947-8396
Electronic ISSN:
1432-0630
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
