Ultrafast Optical and Magneto-Optical Dynamics in Colossal-Magnetoresistance Manganites

• Authors: V. Dorosinets , P. Richter , G. Jakob , H. Roskos
• Languages of publication: EN

Abstracts

EN

Transient pump-probe reflectance measurements on La_{0.67}Ca_{0.33}MnO_3/MgO and La_{0.67} Ca_{0.33}MnO_3/SrTiO_3 thin films reveal a hitherto unknown magnetization-dependent energy gap that determines the relaxation process of the optically excited charge carriers on the picosecond time scale. In the case of La_{0.67}Ca_{0.33}MnO_3/SrTiO_3, the subsequent reflectance dynamics at low temperatures is determined to be substrate-induced strain that drives the sample into a metastable state characterized by an increased number of paramagnetic domains.

Keywords

EN

78.47.+p

• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 1
• Pages: 211-214

Dates

published

2005-01

received

2004-08-22

Contributors

author

V. Dorosinets

• Physikalisches Institut, J.W. Goethe-Universität, Frankfurt/Main 60054, Germany
• Department of Semiconductor Physics, Belorussian State University, Minsk 220050, Republic of Belarus

author

P. Richter

• Physikalisches Institut, J.W. Goethe-Universität, Frankfurt/Main 60054, Germany

author

G. Jakob

• Institut für Physik, J. Gutenberg-Universität Mainz, Mainz 60054, Germany

author

H. Roskos

• Physikalisches Institut, J.W. Goethe-Universität, Frankfurt/Main 60054, Germany

References

• 1. C. Zener, Phys. Rev. B, 82, 403, 1951
• 2. E. Dagotto, T. Hotta, A. Moreo, Phys. Rep., 344, 1, 2001

Identifiers

DOI

10.12693/APhysPolA.107.211