Giant Dielectric Permittivity Observed in Pb-Based Perovskite Ferroelectrics

Kim, Bog-Gi; Cho, Seong M.; Kim, Tea-Yong; Jang, Hyun M.

doi:10.1103/physrevlett.86.3404

Cited by 151 publications

(69 citation statements)

References 25 publications

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“…Since the first synthesis of the classic PbMg 1=3 Nb 2=3 O 3 (PMN) material in 1961 [1], relaxor ferroelectrics have been the subject of ongoing experimental and theoretical investigation [2 -7] due to their fundamental scientific interest and their importance in technological applications such as capacitors and piezoelectric devices [8,9]. One of the most intriguing properties of relaxors is their temperature-and frequency-dependent dielectric response.…”

mentioning

confidence: 99%

Relationship between Local Structure and Relaxor Behavior in Perovskite Oxides

et al. 2007

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confidence: 99%

Relationship between Local Structure and Relaxor Behavior in Perovskite Oxides

et al. 2007

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“…4)6) Since most of the d 0 -type perovskite oxynitrides are eco-friendly and stable in air, water and even in concentrated acids, oxynitrides with high permittivity can be considered as promising candidates for leadfree dielectric materials to replace the widely used but toxic Pb(Zr,Ti)O 3 (PZT)-based ceramics. 7), 8) Recently, Kim et al reported that BaTaO 2 N and SrTaO 2 N, i.e., oxynitride derivatives of the prototypical dielectrics BaTiO 3 and SrTiO 3 , possessed bulk permittivity of ³4900 and ³2900 with moderate temperature coefficients. 4) To date, the unusual dielectric behavior has been discussed mainly on BaTaO 2 N in relation to its crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Local anionic ordering and anisotropic displacement in dielectric perovskite SrTaO2N

Zhang

Motohashi

Masubuchi

et al. 2011

J. Ceram. Soc. Japan

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The perovskite oxynitride SrTaO 2 N as a promising candidate for lead-free dielectric materials has been studied with a special emphasis on the structural characterization using neutron powder diffraction. SrTaO 2 N powders were prepared by means of ammonia nitridation via precursors obtained from a soft chemistry method and a solid state reaction route. All the products crystallized in tetragonal I4/mcm space group with only slight variation in the lattice constant, e.g., a = 5.7023(1) ¡ and c = 8.0786(1) ¡ for the soft-chemistry derived sample. Neutron diffraction analysis suggested the short-range O/N ordering involving a cis configuration in TaO 4 N 2 octahedra together with large anionic displacement within the ab plane on their axial position in the average crystal lattice. These facts are associated with local tilting of the TaO 4 N 2 octahedra which is likely to play a key role in the unusual dielectric behavior of SrTaO 2 N.

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“…The dielectric anomalies appeared at different temperatures are generally ascribed to the ferroelectric phase transition (FPT) from rhombohedral ferroelectric phase to cubic paraelectric phase with the increase of temperature [11]. Due to the oxide doping, the temperature of dielectric maximum (T m ) varies accompanied by just broadened, whereas the frequency dispersion of the dielectric behavior becomes almost vanish.…”

Section: Resultsmentioning

confidence: 99%