Dynamics of the charge-spin interplay in a perovskite manganite

K. Waku; T. Suzuki; T. Nomura; T. Katsufuji

doi:10.1103/PhysRevB.72.012418

Dynamics of the charge-spin interplay in a perovskite manganite

K. Waku, T. Suzuki, T. Nomura, T. Katsufuji

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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.

Original language	English
Article number	012418
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.72.012418
Publication status	Published - 2005 Oct 27

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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AU - Katsufuji, T.

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AB - 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.

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