Paramagnetic point and pair defects in oxide perovskites

Müller, K. A.

doi:10.1051/jphys:01981004204055100

Cited by 101 publications

(42 citation statements)

References 33 publications

(32 reference statements)

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“…59͒ and other perovskites in the 1960s. 60 Li et al 61 correlated the emission of yellow PL with the g ϳ 1.96 EPR signal of oxygen vacancies in ZnO nanostructures synthesized by different methods. The authors suggest that this signal is linked to deep or shallow donor concentration and green or yellow PL, depending on the depth of the level involved.…”

Section: Resultsmentioning

confidence: 99%

Structural conditions that leads to photoluminescence emission in SrTiO3: An experimental and theoretical approach

Longo

Figueiredo

Lázaro

et al. 2008

Journal of Applied Physics

159

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• ͒ vacancies were identified in disordered SrTiO 3 powders prepared by the polymeric precursor method, based on experimental measurements by x-ray absorption near edge structure spectroscopy. The paramagnetic complex states of ͓TiO 5 · V O • ͔ and ͓SrO 11 · V O • ͔ with unpaired electrons were confirmed by electron paramagnetic resonance spectroscopy. The disordered powders showed strong photoluminescence at room temperature. Structural defects of disordered powders, in terms of band diagram, density of states, and electronic charges, were interpreted using high-level quantum mechanical calculations in the density functional framework. The four periodic models used here were consistent with the experimental data and explained the presence of photoluminescence.

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Section: Resultsmentioning

confidence: 99%

Structural conditions that leads to photoluminescence emission in SrTiO3: An experimental and theoretical approach

Longo

Figueiredo

Lázaro

et al. 2008

Journal of Applied Physics

159

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“…One may change the vacancy concentration in a purposely applied reduction procedure [6][7][8]. After that, it can be stabilised with heterovalent doping [3,8,14].…”

Section: Introductionmentioning

confidence: 99%

XPS examination of newly obtained (Na0.5Pb0.5)(Mn0.5Nb0.5)O3 ceramics

Ksepko

Talik

Ratuszna

et al. 2005

Journal of Alloys and Compounds

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“…The signal at g ∼ 5.43 is characteristic of an S = 5/2 system, which is orbitally nondegenerate in an octahedral field with a very strong nearly tetragonal distortion [30][31][32][33]. The fact that g ∼ 5.43 strongly suggests that at X-band frequencies, the frequency of observation is much less than the splitting of the energy levels of Eq.…”

Section: Epr Spectroscopymentioning

confidence: 91%

“…defect associate dipoles in the orthorhombic symmetry due to Fe 3+ present as an intrinsic impurity in the starting materials [30,31]. During high-temperature sintering, this iron forms defect associate dipoles due to iron-oxygen vacancy defect association.…”

Section: Epr Spectroscopymentioning

confidence: 98%