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Among spintronic materials, mixed‐valence manganite La 0.7Sr0.3MnO3 (LSMO) is widely investigated due to its half‐metal nature. LSMO thin films were grown by pulsed laser deposition (PLD) onto amorphous silica substrates heated at nearly 600 °C. An ArF excimer laser was chosen to induce ablation due to its more energetic photons compared to the other quoted excimer laser sources. Different oxygen pressures were considered in order to study the influence of oxygen on the LSMO optical and electrical properties. In this respect, the visible transparency percentage of the deposited films is found good enough for spin‐OLED applications. The absorption coefficient shows an absorption band tunable as a function of the oxygen content. Its energetic location and evolution with the oxygen content demonstrate it originates from radiative transitions between the spin‐majority bands separated by the Jahn–Teller …
Publication date: 
1 Aug 2011

Maurizio Martino, Maura Cesaria, Anna Paola Caricato, Giuseppe Maruccio, Adriano Cola, Isabella Farella

Biblio References: 
Volume: 208 Issue: 8 Pages: 1817-1820
physica status solidi (a)