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A time-resolved optical study of the paramagnetic dielectric-ferromagnetic metal transition in La0.7Ca0.3MnO3

A time-resolved optical study of the paramagnetic dielectric-ferromagnetic metal transition in La0.7Ca0.3MnO3

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MISOCHKO, Oleg Victor, E. M. KAIDASHEV, Nikolai GEORGIEV, Thomas DEKORSY, Irina N. ZAKHARCHENKO, 2003. A time-resolved optical study of the paramagnetic dielectric-ferromagnetic metal transition in La0.7Ca0.3MnO3. In: Journal of experimental and theoretical physics. 97(4), pp. 788-793. Available under: doi: 10.1134/1.1625069

@article{Misochko2003timer-9045, title={A time-resolved optical study of the paramagnetic dielectric-ferromagnetic metal transition in La0.7Ca0.3MnO3}, year={2003}, doi={10.1134/1.1625069}, number={4}, volume={97}, journal={Journal of experimental and theoretical physics}, pages={788--793}, author={Misochko, Oleg Victor and Kaidashev, E. M. and Georgiev, Nikolai and Dekorsy, Thomas and Zakharchenko, Irina N.} }

eng Zakharchenko, Irina N. Georgiev, Nikolai 2011-03-24T17:53:07Z Zakharchenko, Irina N. First publ. in: Journal of experimental and theoretical physics 97 (2003), 4, pp. 788-793 The relaxation dynamics of charge carriers in an epitaxial La0.7Ca0.3MnO3 film was studied by the light reflection method with a femtosecond time resolution in a wide temperature range. The relaxation of time-resolved photoinduced reflections was shown to be two-component in the whole temperature range including the paramagnetic dielectric-ferromagnetic metal transition at T ≈ 150 160 K. The fast relaxation component had a maximum lifetime (τ ~ 500 ps) in the transition region, and its contribution to relaxation increased as temperature decreased. The lifetime of the slow component was minimum (τ ~ 15 fs) in the transition region. In addition, fast oscillations assigned to coherent phonons appeared in photoinduced responses at T < 200 K. The dephasing time of these oscillations increased as temperature decreased, whereas their frequency changed insignificantly. application/pdf Dekorsy, Thomas 2003 Kaidashev, E. M. deposit-license Misochko, Oleg Victor Georgiev, Nikolai Kaidashev, E. M. A time-resolved optical study of the paramagnetic dielectric-ferromagnetic metal transition in La0.7Ca0.3MnO3 Misochko, Oleg Victor Dekorsy, Thomas 2011-03-24T17:53:07Z

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