Evidence for the charge-density-wave nature of the stripe phase in manganites

Heat capacity and magnetization measurements strongly suggest that the onset of the stripe phase in La0.50Ca0.50MnO3, La0.48Ca0.52MnO3 and Pr0.48Ca0.52MnO3 is due to the formation of a charge density wave. The transition associated with the onset of the stripe phase is second order, and it can be we...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Condensed matter 2007-05, Vol.19 (19), p.192201-192201 (7)
Main Authors: Cox, S, Lashley, J C, Rosten, E, Singleton, J, Williams, A J, Littlewood, P B
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetotransport phenomena, materials for magnetotransport
Manganites
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Heat capacity and magnetization measurements strongly suggest that the onset of the stripe phase in La0.50Ca0.50MnO3, La0.48Ca0.52MnO3 and Pr0.48Ca0.52MnO3 is due to the formation of a charge density wave. The transition associated with the onset of the stripe phase is second order, and it can be well modelled as a Peierls transition (typically associated with charge-density-wave formation) in a disordered system (a 'dirty' Peierls transition). The entropy change at this transition is very similar for La0.50Ca0.50MnO3, La0.48Ca0.52MnO3 and Pr0.48Ca0.52MnO3, suggesting a common origin. We show that this is not associated primarily with magnetic order since the magnetization varies by a factor of 100 between the compositions while the change in entropy remains roughly constant.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/19/19/192201