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

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• 作者：Sayani Majumdar (1)
  Hannu Huhtinen (1)
  Petriina Paturi (1)
  
• 关键词：Perovskite manganites ; Persistent photo ; induced magnetization ; Magnetic properties ; Thin films
• 刊名：Journal of Superconductivity Incorporating Novel Magnetism
• 出版年：2013
• 出版时间：May 2013
• 年：2013
• 卷：26
• 期：5
• 页码：1455-1459
• 全文大小：322 KB
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• 作者单位：Sayani Majumdar (1)
  Hannu Huhtinen (1)
  Petriina Paturi (1)
  
  1. Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, 20014, Turku, Finland
  
• ISSN：1557-1947

文摘

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.