| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1811649 | Physica B: Condensed Matter | 2011 | 6 Pages |
Abstract
Infrared absorption study has been carried out on a series of half doped manganites, La0.5Ca0.5−x SrxMnO3(0.1≤x≤0.5)(0.1≤x≤0.5), with varying magnetic ground state. The charge ordering transition observed in samples with x≤0.3x≤0.3 is accompanied by a mode at ∼525cm−1 in addition to the stretching mode at 615 cm−1 and bending mode at 400 cm−1. Phonon hardening is found to occur below the CE-type antiferromagnetic ordering temperature. The value of the insulating gap decreases on doping with Sr from 727 to 615 cm−1.
Research highlights► Half doped Manganites. ► Coupling modes of vibration with magnetic ordering. ► Reduction of optical gap with increase in electron bandwidth.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Indu Dhiman, A. Das, K.R. Priolkar, P.S.R. Murthy,