Nonlinear-optical properties of thin La0.7Ca0.3Mn O3 films and dynamics of photoinduced phase transition

E. Mishina; N. Sherstyuk; A. Sigov; T. Tamura; S. Nakabayashi; V. Moshnyaga; K. Samwer; L. Kulvuk; Th. Rasing

doi:10.3379/tmjpn2001.4.272

E. Mishina, N. Sherstyuk, A. Sigov, T. Tamura, S. Nakabayashi, V. Moshnyaga, K. Samwer, L. Kulvuk, Th. Rasing

Author information

E. Mishina
1 Department of Chemistry/Faculty of Science/Saitama University
N. Sherstyuk
1 Department of Chemistry/Faculty of Science/Saitama University
A. Sigov
Moscow State Institute of Radioengineering, Electronics and Automation (Technical University)
T. Tamura
Moscow State Institute of Radioengineering, Electronics and Automation (Technical University)
S. Nakabayashi
I.Physikalisches Institut/Universiteit GOttingen
V. Moshnyaga
Institute of Applied Physics/Academy of Science
K. Samwer
University of Nijmegen, NSRIM Institute, Nijmegen
L. Kulvuk
University of Nijmegen, NSRIM Institute, Nijmegen
Th. Rasing
University of Nijmegen, NSRIM Institute, Nijmegen

Keywords: perovskite manganite, second harmonic generation, photoinduced effects, magneto-optical recording

JOURNAL FREE ACCESS

2004 Volume 4 Issue 4-2 Pages 272-277

DOI https://doi.org/10.3379/tmjpn2001.4.272

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Abstract

Strong optical second-harmonic was observed in a centrosymmetric LCMO thin films in ferromagnetic phase and assigned a s magnetization-induced effect. B y n on-linearopticalexperiment, magnetization is shown to be sensitivefor laser illumination. A threshold of photoinduced demagnetisation depends on the films structure: it isdrastically decreases in the presence of grain boundaries. For steady state conditions, the SHG field is described bypower law with critical exponent 2β=0.64±0.05. Abovethe threshold a complicated dynamics of photoinduceddemagnetization is observed, which is modeled byphotoinduced modification of electron phase separation.

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