| Issue |
EPL
Volume 86, Number 2, April 2009
|
|
|---|---|---|
| Article Number | 27003 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/86/27003 | |
| Published online | 04 May 2009 | |
Conductance switching and inhomogeneous field melting in the charge ordered manganites
Harish-Chandra Research Institute - Chhatnag Road, Jhusi, Allahabad 211019, India
Corresponding author: anam@mri.ernet.in
Received:
12
November
2008
Accepted:
18
March
2009
The field-induced switching of conductance in the charge ordered half-doped manganites is controlled by the combination of metastability, an inhomogeneous high-field state, and cation disorder. We study this non-equilibrium problem via real space Monte Carlo on a disordered strong coupling model appropriate to the manganites. We reproduce the variation of the switching fields with the mean ionic radius rA and cation disorder 
, and demonstrate how the experimental features arise from the proximity of several phases in the Landau free-energy landscape. Our prediction for the field melted state is consistent with a growing body of experimental evidence.
PACS: 75.47.Lx – Manganites / 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.