A1 Journal article – refereed

Comparative Study of Persistent Photo-Induced Magnetization in Low and Intermediate Bandwidth Manganite Thin Films




List of Authors: Majumdar S, Huhtinen H, Paturi P

Publisher: SPRINGER

Publication year: 2013

Journal: Journal of Superconductivity and Novel Magnetism

Journal name in source: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM

Journal acronym: J SUPERCOND NOV MAGN

Number in series: 5

Volume number: 26

Issue number: 5

Number of pages: 5

ISSN: 1557-1939

DOI: http://dx.doi.org/10.1007/s10948-012-1970-x


Abstract
This article presents a comparative study of persistent photo-induced magnetization in intermediate and low bandwidth perovskite manganite thin films, and analyzes the possible mechanisms for the observed differences in light of their structural and magnetic properties. Intermediate bandwidth manganite La0.9Ca0.1MnO3 (LCMO) and low bandwidth manganite Pr0.9Ca0.1MnO3 (PCMO), both show persistent change in magnetization under light. However, under illumination, while LCMO shows increased ferromagnetic (FM) interaction both in low and saturation field regime, PCMO shows increased FM interaction at low fields and decreased FM behavior near saturation fields. Also relaxation of photo-induced magnetization shows stretched exponential nature in LCMO compared to much faster relaxation, beyond detection limit in PCMO. Comparison between these two systems will provide important insight of the underlying physics of persistent photo-induced magnetization of perovskites manganites and will consequently facilitate their application in magneto-optical devices, photodiodes and photovoltaics.


Research Areas


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