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Magnetic Properties of Mixed Valence La ( AgSr ) MnO 3 Manganites Obtained by Solid‐State Reaction Method
Author(s) -
Amano M. E.,
Betancourt I.,
Huerta L.
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12099
Subject(s) - curie temperature , ferromagnetism , valence (chemistry) , x ray photoelectron spectroscopy , magnetization , paramagnetism , formula unit , analytical chemistry (journal) , materials science , saturation (graph theory) , magnetic hysteresis , chemistry , solid solution , condensed matter physics , hysteresis , nuclear magnetic resonance , crystallography , crystal structure , metallurgy , magnetic field , physics , mathematics , organic chemistry , quantum mechanics , chromatography , combinatorics
In this work, we present a systematic study on the effect of monovalent and divalent cation inclusion on the magnetic properties of the manganites series La 0.80 ( Ag 1− x Sr x ) 0.20 MnO 3 ( x = 0.0–1.0) synthesized by the solid‐state reaction method. The decreasing Sr : Ag proportion across the compositional series was verified by X‐ray photoelectron spectroscopy. Concerning magnetic properties, the hysteresis curves manifested an initial paramagnetic response at x = 0.0, followed by a progressive ferromagnetic behavior with an optimum Ag : Sr ratio at x = 0.75, for which an enhanced saturation magnetization of 51 Am 2 /kg and a Curie temperature of 336 K were recorded. Results are explained on the basis of the effect of the increasing unit cell volume on the double exchange interaction between magnetic Mn 3+ – Mn 4+ atoms.
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