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Title: XANES study of Fe-implanted strontium titanate

Abstract

Properties of strontium titanate SrTiO{sub 3} (STO) depend to a great extent on the substitutional dopants and defects of crystal structure. The ion beam implantation method was used for doping STO (001) crystals with Fe at different doses. Implanted samples were then annealed at 350°C in oxygen to induce recrystallization and remove oxygen vacancies produced during ion implantation process. The effect of Fe doping and post-implantation annealing was studied by X-ray Absorption Near Edge Spectroscopy (XANES) method and Superconducting Quantum Interference Device (SQUID). XANES allowed to monitor the change in structure of STO crystals and in the local environment of Fe following the implantation and annealing steps. SQUID measurements revealed correlation between magnetic moment and Fe implantation dose. Ferromagnetic hysteresis was observed on selected Fe-implanted STO at 5 K. The observed magnetic properties can be correlated with the several Fe oxide phases in addition to the presence of O/Ti vacancies.

Authors:
; ; ;  [1]
  1. Department of Physics and Astronomy, and Department of Chemistry, University of Western Ontario, London, ON N6A 5B7 (Canada)
Publication Date:
OSTI Identifier:
22265949
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1590; Journal Issue: 1; Conference: International conference on electronic, photonic, plasmonic and magnetic properties of nanomaterials, London (Canada), 12-16 Aug 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ABSORPTION; ABSORPTION SPECTROSCOPY; ANNEALING; CRYSTALS; DOPED MATERIALS; DOSES; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; OXIDES; OXYGEN; RECRYSTALLIZATION; SQUID DEVICES; STRONTIUM; STRONTIUM TITANATES; X RADIATION; X-RAY SPECTROSCOPY

Citation Formats

Lobacheva, O., Goncharova, L. V., Chavarha, M., and Sham, T. K. XANES study of Fe-implanted strontium titanate. United States: N. p., 2014. Web. doi:10.1063/1.4870200.
Lobacheva, O., Goncharova, L. V., Chavarha, M., & Sham, T. K. XANES study of Fe-implanted strontium titanate. United States. https://doi.org/10.1063/1.4870200
Lobacheva, O., Goncharova, L. V., Chavarha, M., and Sham, T. K. 2014. "XANES study of Fe-implanted strontium titanate". United States. https://doi.org/10.1063/1.4870200.
@article{osti_22265949,
title = {XANES study of Fe-implanted strontium titanate},
author = {Lobacheva, O. and Goncharova, L. V. and Chavarha, M. and Sham, T. K.},
abstractNote = {Properties of strontium titanate SrTiO{sub 3} (STO) depend to a great extent on the substitutional dopants and defects of crystal structure. The ion beam implantation method was used for doping STO (001) crystals with Fe at different doses. Implanted samples were then annealed at 350°C in oxygen to induce recrystallization and remove oxygen vacancies produced during ion implantation process. The effect of Fe doping and post-implantation annealing was studied by X-ray Absorption Near Edge Spectroscopy (XANES) method and Superconducting Quantum Interference Device (SQUID). XANES allowed to monitor the change in structure of STO crystals and in the local environment of Fe following the implantation and annealing steps. SQUID measurements revealed correlation between magnetic moment and Fe implantation dose. Ferromagnetic hysteresis was observed on selected Fe-implanted STO at 5 K. The observed magnetic properties can be correlated with the several Fe oxide phases in addition to the presence of O/Ti vacancies.},
doi = {10.1063/1.4870200},
url = {https://www.osti.gov/biblio/22265949}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1590,
place = {United States},
year = {Mon Mar 31 00:00:00 EDT 2014},
month = {Mon Mar 31 00:00:00 EDT 2014}
}