Home
For authors
Submission status

Archive
Archive (English)
Current
   Volumes 113-119
   Volumes 93-112
      Volume 112
      Volume 111
      Volume 110
      Volume 109
      Volume 108
      Volume 107
      Volume 106
      Volume 105
      Volume 104
      Volume 103
      Volume 102
      Volume 101
      Volume 100
      Volume 99
      Volume 98
      Volume 97
      Volume 96
      Volume 95
      Volume 94
      Volume 93
Search
VOLUME 99 (2014) | ISSUE 1 | PAGE 30
Ultrafast optical probes of dynamic behavior in La0.7Sr0.3MnO3/YBa2Cu3O7-δ/La0.7Sr0.3MnO3 heterostructure
Abstract
Ultrafast pump-optical probe spectroscopy was used to analyze carriers dynamics behavior in La0.7Sr0.3MnO3/YBa2Cu3O7-δ/La0.7Sr0.3MnO3 heterostructure. Our results show the pump signal Δ R/R for higher laser power (such as 21 and 41 mW), below Tc, first goes positive, then crosses zero and goes negative, before relaxing back to equilibrium over a time scale of a few ten picoseconds. We extract the characteristic relaxation time of the different process by fitting the data at these powers with a three-exponential decay. For higher laser power, the long characteristic relaxation time are obtained, which implies the competition between FM order and SC order in the La0.7Sr0.3MnO3/YBa2Cu3O7-δ/La0.7Sr0.3MnO3 heterostructure.