Magnetic and optical properties of Mn-doped BaSnO3

Balamurugan, Krishnaswamy; Kumar, N. Harish; Ramachandran, B.; Rao, M. S. Ramachandra; Chelvane, J. Arout; Santhosh, P. N.

doi:10.1016/j.ssc.2009.02.037

Cited by 79 publications

(26 citation statements)

References 19 publications

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“…5exhibits a batch of Raman active modes for all the samples. The Raman active modes for these samples are in agreement with the Raman spectra reported in the literature for undoped and La-doped BaSnO 3 samples[37,38]. Raman active modes in undoped BaSnO 3 are induced by defects such as oxygen vacancies which destroy the translational periodicity of the lattice.…”

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confidence: 87%

Electrical characterization of porous La-doped BaSnO3 using impedance spectroscopy

Ansaree

Upadhyay

2015

Ionics

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A few compositions in the system Ba 1−x La x SnO 3 (x=0.00, 0.01, 0.05, and 0.10) have been synthesized via the solid state ceramic route. The synthesized powders have been characterized using X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, Raman spectroscopy, Fourier transformation infrared, thermogravimetrical analysis, and differential thermal analysis techniques. The powder X-ray diffraction pattern of the samples confirms the formation of a single-phase solid solution only up to 0.50≤x. It was found that all the samples have a cubic crystal structure. The electrical properties of La-modified BaSnO 3 were studied using ac impedance spectroscopy technique over a wide range of temperatures (50-650°C) in the frequency range of 10 Hz-13 MHz. The complex impedance plots above 300°C show that total impedance is due to the contributions of grain and grain boundaries. The resistance of these contributions has been determined. Variation of these resistances with temperature shows the presence of two different regions with different slopes. The nature of the variation of conductivity of the grain and grain boundaries is different in different regions. Based on the value of activation energy, it is proposed that conduction via hopping of doubly ionized oxygen vacancies (V O •• ) is taking place in the temperature region of 300-450°C, whereas in the temperature region of 450-650°C, it is due to proton, i.e., OH • ions, hopping.

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confidence: 87%

Electrical characterization of porous La-doped BaSnO3 using impedance spectroscopy

Ansaree

Upadhyay

2015

Ionics

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“…According to the Group theory, the centro-symmetric BaSnO 3 with an ideal cubic structure belonging to the space group Pm3m should have three IR active modes with F 1u symmetry but no Raman active modes. Nevertheless, the Raman spectral fea- [20,32,33]. In our case, there are three Raman features observed at 411, 558, and 832 cm −1 , being attributed to the modes of BaSnO 3 .…”

Section: Crystal Structure and Morphologymentioning

confidence: 55%

Preparation and photophysical properties of rhombic dodecahedral perovskite-type BaSnO3

Guo

Yang

et al. 2012

Appl. Phys. A

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BaSnO 3 grains with a rhombic dodecahedron shape have been synthesized via a facile modified hydrothermal approach. The structure and morphology evolution during hydrothermal treatment have been investigated with X-ray diffraction, scanning electron microscopy, and Raman and Fourier transform infrared spectroscopy. The sample with the single-phase of BaSnO 3 can be obtained at the hydrothermal temperature of 24°C, and the grain size grows with an increasing temperature from 10 to 15 µm below 270°C. But the grain size decreases sharply to 4 µm when the temperature reaches 280°C. The optical absorption and surface photovoltage spectroscopy analysis indicate that controlling the size and shape is of great importance in tuning photophysical properties of BaSnO 3 powders.

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“…When compared to BSO crystallized in an ideal cubic structure with Pm3m symmetry, the SrSnO 3 and CaSnO 3 in orthorhombic structure with Pbnm symmetry exhibit first order Raman scattering peaks due to the difference in crystal structure. [19] In BSO, the larger Ba 2+ ions (1.61 Å) perfectly fill the cubic-octahedral cavities in the structure, causing the Sn-O-Sn bond angle to be 180°. Also, due to the smaller ionic sizes of Sr 2+ (1.44 Å) and Ca 2+ (1.34 Å), the SnO 6 octahedra tilts in both SrSnO 3 (bond angle of 160°) and CaSnO 3 (bond angle of 148°).…”

Section: Resultsmentioning

confidence: 99%

Structural, electrical, and luminescence characteristics of vacuum-annealed epitaxial (Ba,La)SnO3 thin films

Anoop

Park

Lee

et al. 2015

Electron. Mater. Lett.

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Magnetic and optical properties of Mn-doped BaSnO3

Cited by 79 publications

References 19 publications

Electrical characterization of porous La-doped BaSnO3 using impedance spectroscopy

Electrical characterization of porous La-doped BaSnO3 using impedance spectroscopy

Preparation and photophysical properties of rhombic dodecahedral perovskite-type BaSnO3

Structural, electrical, and luminescence characteristics of vacuum-annealed epitaxial (Ba,La)SnO3 thin films

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