Model study of physical properties of manganite system

The colossal magnetoresistive (CMR) materials: the doped manganites exhibit strong correlations among the charges, spins, orbitals and the lattice. In this communication we present a microscopic theoretical model for the system and study the temperature variation of its magnetic susceptibility. The...

Full description

Saved in:
Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2007, Vol.387 (1), p.259-270
Main Authors: Rout, G.C., Parhi, Nilima, Behera, S.N.
Format: Article
Language:English
Subjects:
Colossal magnetoresistance
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Jahn–Teller distortion
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:The colossal magnetoresistive (CMR) materials: the doped manganites exhibit strong correlations among the charges, spins, orbitals and the lattice. In this communication we present a microscopic theoretical model for the system and study the temperature variation of its magnetic susceptibility. The model Hamiltonian envisages Jahn–Teller static lattice distortion in the e g band and treats the ferromagnetic interaction of the electrons in the core t 2 g levels within the mean-field approximation, while incorporating the possibility of hybridization between the two bands. The two particle electron Green's functions involved in the susceptibility are calculated by Zubarev's technique. Finally, the experimental results are discussed on the basis of the parameter dependence of the dynamic susceptibility of the system in the long wavelength limit and at finite temperature.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2006.04.014