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강상관계 물질 연구단
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High-resolution structure studies and magnetoelectric coupling of relaxor multiferroic Pb(Fe0.5Nb0.5)O3

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Title
High-resolution structure studies and magnetoelectric coupling of relaxor multiferroic Pb(Fe0.5Nb0.5)O3
Author(s)
Hasung Sim; Darren C. Peets; Sanghyun Lee; Seongsu Lee; T. Kamiyama; K. Ikeda; T. Otomo; S.-W. Cheong; Je-Geun Park
Publication Date
2014-12
Journal
PHYSICAL REVIEW B, v.90, no.21, pp.214438 -
Publisher
AMER PHYSICAL SOC
Abstract
Pb(Fe0.5Nb0.5)O3 (PFN), one of the few relaxor multiferroic systems, has a G-type antiferromagnetic transition at TN = 143K and a ferroelectric transition at TC = 385 K. By using high-resolution neutron-diffraction experiments and a total scattering technique, we paint a comprehensive picture of the long- and short-range structures of PFN: (i) a clear sign of short-range structural correlation above TC, (ii) no sign of the negative thermal expansion behavior reported in a previous study, and (iii) clearest evidence thus far of magnetoelectric coupling below TN. We conclude that at the heart of the unusual relaxor multiferroic behavior lies the disorder between Fe3+ and Nb5+ atoms.We argue that this disorder gives rise to short-range structural correlations arising from O disorder in addition to Pb displacement.
URI
http://pr.ibs.re.kr/handle/8788114/752
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
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