The interplay between charge and spin degrees of freedom is a key ingredient of the colossal magnetoresistance in perovskite manganites. However, our knowledge of such an interplay was limited to its static aspect, and very little was known regarding its dynamics. Here, we show that the ac (optical) conductivity of perovskite manganite Pr0.6Sr0.4MnO3 (TC=297K) under magnetic field does not show such a universal M2 scaling (M is the magnetization) as observed in the dc conductivity, but shows a marginal £ M £1 dependence in the critical regime. This result indicates a unique interplay between fluctuating spin and charge in this series of compounds.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2005 Oct 27|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics