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Low-field magnetoresistance of La0.7Sr0.3MnO3 nanoceramics processed by different precursor approaches and powder compaction techniques

“…In the gelation process, we used acrylamide, N,N'-methylenebisacrylamide and α,α'-azoisobutyronitrile (Merck). We obtained solid precursors from the chelate solution by two approaches: 11 (i) gelation of solution followed by dehydration at 90 °C in air ('GEL' samples) and (ii) microwave dehydration of solution ('MW' samples). By both procedures we obtained solid foams, which were then heat-treated at 700 °C (oxygen atmosphere, 10 h) to form phase-pure perovskitelike LSMO, as established by X-ray diffraction (XRD).…”