Comparison of Sol-Gel Derived and Pulsed Laser Deposited Epitaxial La0.67Ca0.33MnO3 Films for IR Bolometer
2004 (English)In: Mat. Res. Soc. Symp. Proc., Vol. 811, E2.5.1-E2.5.6 p.Article in journal (Refereed) Published
Epitaxial La0.67Ca0.33MnO3 films have been prepared on LaA1O3 crystals by pulsed laser deposition (PLD) and by a novel all-alkoxide sol-gel technique. Different out-of-plane lattice parameters are found for the as-prepared films, and scanning electron microscopy shows a more porous structure for sol-gel films as compared to PLD films. These differences are largely removed by post-annealing at 1000 °C. Transport measurements show maximum temperature coefficient of resistivity of 8.2 % K-1 at 258 K (PLD) and 6.1 % K-1 at 241 K (sol-gel) and :colossal magnetoresistance at 7 kOe of 35 % at 263 K (PLD) and 32 % at 246 K (sol-gel).
Place, publisher, year, edition, pages
2004. Vol. 811, E2.5.1-E2.5.6 p.
IdentifiersURN: urn:nbn:se:uu:diva-67470OAI: oai:DiVA.org:uu-67470DiVA: diva2:95381