Overlap of the intrinsic and extrinsic magnetoelectric effects in BiFeO3-PbTiO3 compounds: Potentialities for magnetic-sensing applications

Autor(es)

Montanher, D. Z. ^[1] ; Freitas, V. F. ^[1] ; Pereira, J. R. D. ^[1] ; Cotica, L. F. ^[1] ; Garcia, D. ^[2] ; Eiras, J. A. ^[2] ; Santos, I. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Maringa, Dept Phys, Multiferro & Multifunct Mat & Devices Grp, BR-87020900 Maringa, PR - Brazil

^[2] Univ Fed Sao Carlos, Ferroelect Ceram Grp, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Physics; v. 113, n. 3 JAN 21 2013.
• Citações Web of Science: 11

Resumo

The potentialities of BiFeO3-PbTiO3 multiferroic compounds for magnetic-field sensing applications is investigated by characterizing the dynamical magnetoelectric response of La doped (0.6)BiFeO3-(0.4)PbTiO3 piezoceramics. The results are compared with those obtained in Nb doped (1 wt. %) PbZr0.53Ti0.47O3 (PZT-5A) piezoceramics and the observed non-linearity of the oscillating voltage response of (0.6) BiFeO3-(0.4) PbTiO3 piezoceramics is attributed to the overlapping of the intrinsic and extrinsic magnetoelectric effects that were successfully decoupled by analyzing the in-phase and out-of-phase voltage components relative to applied oscillating magnetic field. For an alternating cosine-like magnetic field of 0.32 Oe, at the piezoelectric resonance frequency (184.2 kHz), the alternating voltage response decreases from 7.77 mV, at - 10 kOe, to 2.71 mV, at 1.8 kOe, to subsequently increases until 5.97 mV at 10 kOe. This non-linear voltage response, which can be easily converted into a linear signal by using the phase difference, can be used for static magnetic field sensing in a wide range of magnetic fields. (C) 2013 American Institute of Physics. {[}http://dx.doi.org/10.1063/1.4775796] (AU)

• Processo FAPESP: 08/04025-0 - Materiais multifuncionais multiferróicos nanoestruturados: síntese, propriedades, fenomenologia e aplicações
• Beneficiário: José Antonio Eiras
• Modalidade de apoio: Auxílio à Pesquisa - Temático