Physics – Condensed Matter – Materials Science
Scientific paper
2009-09-07
Phys. Rev. B 80, 224411 (2009)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1103/PhysRevB.80.224411
Temperature and fluence dependence of the transient photoinduced reflectivity and the magnetooptical Kerr angle was measured in two Pr0.6Ca0.4MnO3 thin films subject to tensile and compressive substrate-induced strain. A photoinduced transient ferromagnetic metallic (TFM) phase is found to form below ~60K and ~40K in the substrate-strained and substrate-compressed film, respectively. From the hysteresis loops a difference in the TFM cluster sizes and amount of photomodulation is observed at low temperatures and low excitation fluences in the films with different strain. Surprisingly, the characteristic timescale for the TFM phase photomodulation is virtually strain independent. At high excitation fluences, the cluster sizes and amount of photomodulation are independent on the substrate-induced strain.
Filippi Massimiliano
Gradisek A.
Mertelj T.
Mihailovic Dragan
Prellier Wilfrid
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