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Absence of zero-field-cooled exchange bias effect in single crystalline La2−xAx CoMnO6 (A=Ca,Sr) compounds
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Macchiutti, C., Jesus, J. R., Carneiro, F. B., Bufaiçal, L., Ciomaga Hatnean, M., Balakrishnan, Geetha and Bittar, E. M. (2021) Absence of zero-field-cooled exchange bias effect in single crystalline La2−xAx CoMnO6 (A=Ca,Sr) compounds. Physical Review Materials, 5 (9). 094402. doi:10.1103/PhysRevMaterials.5.094402 ISSN 2475-9953.
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WRAP-Absence-zero-field-cooled-exchange-bias-effect-single-crystalline-La2−xAx-CoMnO6-compounds-2021.pdf - Published Version - Requires a PDF viewer. Download (1514Kb) | Preview |
Official URL: http://dx.doi.org/10.1103/PhysRevMaterials.5.09440...
Abstract
Magnetic properties of A2BB'O6 (A = rare or alkaline-earth ions; B, B' = transition-metal ions) double perovskites are of great interest due to their potential spintronic applications. Particularly fascinating is the zero-field-cooled exchange bias effect observed for the hole-doped La2−xAxCoMnO6 polycrystalline samples. In this paper we synthesize La2CoMnO6, La1.5Ca0.5CoMnO6, and La1.5Sr0.5CoMnO6 single crystals by the floating zone method and study their magnetic behavior. The three materials are ferromagnetic. Surprisingly, we observe no zero or even conventional exchange bias effect for the Ca- and Sr-doped single crystals, in sharp contrast to polycrystalline samples. This absence indicates that the lack of grain boundaries and spin-glass-like behavior, not observed in our samples, might be key ingredients for the spontaneous exchange bias phenomena seen in polycrystalline samples.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Perovskite (Mineral) -- Magnetic properties , Spintronics , Polycrystals -- Magnetic properties, Ferromagnetism | |||||||||||||||
Journal or Publication Title: | Physical Review Materials | |||||||||||||||
Publisher: | American Physical Society | |||||||||||||||
ISSN: | 2475-9953 | |||||||||||||||
Official Date: | 7 September 2021 | |||||||||||||||
Dates: |
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Volume: | 5 | |||||||||||||||
Number: | 9 | |||||||||||||||
Article Number: | 094402 | |||||||||||||||
DOI: | 10.1103/PhysRevMaterials.5.094402 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
Copyright Holders: | ©2021 American Physical Society | |||||||||||||||
Date of first compliant deposit: | 14 September 2021 | |||||||||||||||
Date of first compliant Open Access: | 14 September 2021 | |||||||||||||||
RIOXX Funder/Project Grant: |
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