| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8943287 | Journal of Alloys and Compounds | 2019 | 24 Pages |
Abstract
Observed Curie temperature is in the range of 102-115â¯K and it is found to be independent of Strontium doping concentration. Bifurcation in FC-ZFC, for all the samples, is at higher temperature than blocking temperature (â¼72â¯K) indicates glassy state. We have calculated thickness of magnetic dead layer by two different ways and it lies between 1.6 and 2.9â¯nm. Concentration of divalent element and oxygen non-stoichiometry affects the relative fraction of Mn3+/Mn4+ ions. Mn3+/Mn4+ in our samples is determined from areas under the deconvoluted X-Ray Photoelectron Spectra (XPS) of Mn core level. The Mn3+/Mn4+ ratio is higher than the value expected from nominal composition, which indicates oxygen non-stoichiometry. Oxygen non-stoichiometry is also confirmed by chemical titration method.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Balu Thombare, Pravin Dusane, Shankar Kekade, Ashwini Salunkhe, R.J. Choudhary, D.M. Phase, Rupesh S. Devan, S.I. Patil,