Probing the dielectric, piezoelectric and magnetic behavior of CoFe2O4/BNT-BT0.08 composite thin film fabricated by sol-gel and spin-coating methods

We investigated in this paper a novel bilayer composite obtained by sol-gel and spin coating of the ferroelectric 0.92Na 0.5 Bi 0.5 TiO 3 –0.08BaTiO 3 (abbreviated as BNT-BT 0.08 ) and ferromagnetic CoFe 2 O 4 phases, for miniature low-frequency magnetic sensors and piezoelectric sensors. This heter...

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Bibliographic Details
Published in:Scientific reports 2018-12, Vol.8 (1), p.1-13, Article 17883
Main Authors: Cernea, Marin, Vasile, Bogdan Stefan, Surdu, Vasile Adrian, Trusca, Roxana, Bartha, Cristina, Craciun, Floriana, Galassi, Carmen
Format: Article
Language:English
Subjects:
639/301/119/996
639/766/1130/2798
Atomic force microscopy
Dielectric constant
Humanities and Social Sciences
Magnetism
Microscopy
multidisciplinary
Science
Science (multidisciplinary)
Sensors
Spectroscopy
Thin films
Transmission electron microscopy
X-ray diffraction
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Summary:We investigated in this paper a novel bilayer composite obtained by sol-gel and spin coating of the ferroelectric 0.92Na 0.5 Bi 0.5 TiO 3 –0.08BaTiO 3 (abbreviated as BNT-BT 0.08 ) and ferromagnetic CoFe 2 O 4 phases, for miniature low-frequency magnetic sensors and piezoelectric sensors. This heterostructure, deposited on Si-Pt substrate (Si-Pt/CoFe 2 O 4 /BNT-BT 0.08 ), was characterized using selected method such as: X-ray diffraction, dielectric spectroscopy, piezoelectric force microscopy, SQUID magnetometry, atomic force microscopy/magnetic force microscopy, and advanced methods of transmission electron microscopy. CoFe 2 O 4 /BNT-BT 0.08 ferromagnetic–piezoelectric thin films show good magnetization, dielectric constant and piezoelectric response. The results of analyses and measurements reveal that this heterostructure can have applications in high-performance magnetoelectric devices at room temperature.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-36232-3