Volume 86, Number 5, June 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||22 June 2009|
Ultrafast photoinduced phase separation dynamics in Pr0.6Ca0.4MnO3 thin films
Jozef Stefan Institute - Jamova 39, 1000 Ljubljana, Slovenia, EU
2 Faculty of Mathematics and Physics, University of Ljubljana - 1000 Ljubljana, Slovenia, EU
3 Laboratoire CRISMAT, CNRS UMR 6508 - Bd du Marechal Juin, F-14050 Caen Cedex, France, EU
Corresponding author: email@example.com
Accepted: 22 May 2009
The time-resolved magnetooptical Kerr effect in the substrate-strain-induced insulating ferromagnetic phase in (Pr0.6Ca0.4)MnO3 thin films on two different substrates was measured in a magnetic field up to 1.1 T. The photoinduced Kerr rotation and ellipticity show remarkably different magnetic-field dependence. From the comparison of the magnetic-field dependences of the photoinduced and static Kerr rotation and ellipticity we conclude that a transient ferromagnetic metallic phase, embedded within the insulating ferromagnetic phase, is created upon the photoexcitation at low temperatures. A comparison of temporal dependence of the photoinduced Kerr signals with the photoinduced reflectivity indicates that the change of the fractions of the phases takes place on a timescale of ten picoseconds independent of the substrate.
PACS: 78.47.jc – Time resolved spectroscopy (1 > ps) / 78.20.Ls – Magnetooptical effects / 75.70.Ak – Magnetic properties of monolayers and thin films
© EPLA, 2009
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