Weakening of the Helical Antiferromagnetic Order in BaFeO3−δ Nanoparticles Due to Sr-Doping

Weakening of the Helical Antiferromagnetic Order in BaFeO3−δ Nanoparticles Due to Sr-Doping Sr-doped BaFeO3 nanoparticles are synthesized using high-energy ball milling followed by solid-state reaction. The magnetic ground state of non-stoichiometric BaFeO3nanoparticles is different when compared with stoichiometric BaFeO3. The nature of magnetization curve against temperature is modified for the Sr-doped system and irreversibility in magnetization curves is observed in field-cooled (M FC) and zero field-cooled (M ZFC) curves. Susceptibility vs temperature follows the Curie–Weiss behaviour. The magnetization does not saturate even in 90-kOe field. The observed exchange bias is attributed to the existence of more than one magnetic order due to the mixed valence state of Fe. The magnetic order in Sr-doped BaFeO3 is found to change from helical antiferromagnet to an antiferromagnet. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Superconductivity and Novel Magnetism Springer Journals

Weakening of the Helical Antiferromagnetic Order in BaFeO3−δ Nanoparticles Due to Sr-Doping

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media New York
Subject
Physics; Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials
ISSN
1557-1939
eISSN
1557-1947
D.O.I.
10.1007/s10948-017-4065-x
Publisher site
See Article on Publisher Site

Abstract

Sr-doped BaFeO3 nanoparticles are synthesized using high-energy ball milling followed by solid-state reaction. The magnetic ground state of non-stoichiometric BaFeO3nanoparticles is different when compared with stoichiometric BaFeO3. The nature of magnetization curve against temperature is modified for the Sr-doped system and irreversibility in magnetization curves is observed in field-cooled (M FC) and zero field-cooled (M ZFC) curves. Susceptibility vs temperature follows the Curie–Weiss behaviour. The magnetization does not saturate even in 90-kOe field. The observed exchange bias is attributed to the existence of more than one magnetic order due to the mixed valence state of Fe. The magnetic order in Sr-doped BaFeO3 is found to change from helical antiferromagnet to an antiferromagnet.

Journal

Journal of Superconductivity and Novel MagnetismSpringer Journals

Published: Mar 30, 2017

References

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