Processing and Application of Ceramics 2013 Volume 7, Issue 4, Pages: 167-173
https://doi.org/10.2298/PAC1304167K
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Characterization of energy conversion of multiferroic PFN and PFN:Mn
Kozielski Lucjan (University of Silesia, Department of Materials Science, Sosnowiec, Poland)
Bochenek Dariusz (University of Silesia, Department of Materials Science, Sosnowiec, Poland)
Characterization of energy conversion of multiferroic materials is concerned
with multifunctional properties of materials, a topic that is fascinating
from the scientific point of view and important for the modern technology.
The complex characterization of multiferroic structures suffers at present
from lack of a systematic experimental approach and deficiency of
multifunctional magnetoelectric properties testing capabilities. Compactness
and high frequency energy conversion capacity are the main reasons of
invention and improvement of sophisticated materials which are prepared for
high-speed computer memories and broadband transducer devices. As a
consequence, one can easily notice an intense search for new materials for
generation, transformation and amplification of magnetic and electric
energies. In this scenario, the combination of excellent piezoelectric and
magnetic properties makes lead iron niobate Pb(Fe1/2Nb1/2)O3 (PFN) an
attractive host material for application in integrated magnetoelectric energy
conversion applications. PFN multiferroic materials are attractive for
commercial electroceramics due to high value of dielectric permittivity and
magnetoelectric coefficients as well as relatively easy synthesis process.
However, synthesis of PFN ceramics is mostly connected with formation of the
secondary unwanted pyrochlore phase associated with dramatic decrease of
ferroelectric properties. The authors have successfully reduced this negative
phenomenon by Mn doping and finally present high piezoelectric and
magnetoelectric energy conversion efficiency in fabricated PMFN ceramics.
Keywords: magnetoelectric effect, PFN ceramics, piezoelectric transformer