Magnetoelectric effect probe through ppm Fe doping in BaTiO3

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abstract

The nominal BaTiO3 compound often exhibits an assortment of controversial magnetic signals which can be simply explained through minute presence of spurious magnetic elements in the perovskite matrix, even when this compound is synthesized from high grade Ba and Ti precursors. Proton Induced X-Ray Emission (PIXE) technique enable to confirm similar to 100 ppm of Fe contaminant which masks the utterly BaTiO3 diamagnetism. Nevertheless, besides the expected paramagnetism of highly diluted Fe ions, it is also possible to observe a cooperative magnetic moment signature which exhibits an intricate relation with the phase transitions of the BaTiO3 matrix. Such magneto-electric coupling signature is further corroborated by Raman spectroscopy, dielectric and X-ray diffraction measurements, indicating to a partial segregation of a rich Fe oxide phase, having a local structure clamped to the perovskite crystallites, hence acting as a practical probe sensitive to the local structural transitions of the host material. (C) 2015 Elsevier B.V. All rights reserved.

keywords

PHASE-TRANSITION; FERROMAGNETISM; TEMPERATURE; TITANATE; IONS

subject category

Chemistry; Materials Science; Metallurgy & Metallurgical Engineering

authors

Figueiras, FG; Amorim, CO; Amaral, J; Moreira, JA; Tavares, PB; Alves, E; Amaral, VS

our authors

foto Carlos Amorim

Carlos Amorim

Assistant Researcher
foto Fábio Gabriel Nazário Figueiras

Fábio Gabriel Nazário Figueiras

Post-Doc Fellowship
foto João Cunha de Sequeira Amaral

João Cunha de Sequeira Amaral

Assistant Researcher
foto Vitor Brás Sequeira Amaral

Vitor Brás Sequeira Amaral

Full professor

Groups

G2 - Photonic, Electronic and Magnetic Materials
G6 - Virtual Materials and Artificial Intelligence

Projects

CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)

MULTIFOX: Nanometric Probing and Modification of Multiferroic Oxides (PTDC/FIS/105416/2008)

acknowledgements

This research project has been supported by the European Commission under the 7th Framework Programme through the Key Action:

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Publication Details

type
Journal Article
year
2016
journal
JOURNAL OF ALLOYS AND COMPOUNDS
volume
661
publisher
ELSEVIER SCIENCE SA
issn
0925-8388
digital object identifier
10.1016/j.jallcom.2015.11.199
web of science article identifier
WOS:000367521200070

Journal Metrics (JCR 2019)

Journal Impact Factor
4.65
Journal Impact Factor (5 yrs)
4.082
category normalized journal percentile
77.703

Citations

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