Peculiarities of magnetic properties of the iodine doped bismuth-2234 high temperature superconductors

Bunda, V.; Kun, A.; Bunda, S.; Slivka, V. Yu.; Kováč, J.

doi:10.1080/00150199708216196

Cited by 10 publications

(13 citation statements)

References 7 publications

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“…The oxygen atoms only are allowed to move during the B 1q vibration, because of the symmetry conditions related to this type of vibrations [1]. Experiments show that neither the 144.4 nor the 201.8 cm −1 peak exhibit this type of behaviour.…”

Section: Methodsmentioning

confidence: 99%

Raman Spectra of Bismuth Oxyhalide Single Crystals

Bunda¹,

Bunda²

2014

Acta Phys. Pol. A

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Oxyhalogenides of bismuth BiOX (X=Cl, Br and I) are very interesting materials which nd various applications as X-ray luminescent screens, anti-Stokes (frequency upshift) converters, luminophors, and photoconducting analyzers of linear polarized radiation. Since each primitive cell consist of six monoatomic sites, the structure of the reduced representation of the 15 normal modes of vibration is: Γ = 2A1g(Ra.) + B1g(Ra.) + 3Eg(Ra.) + 2A2u(i.r.) + 2Eu(i.r.), in which the vibrations of A1g, B1g and Eg species are active in the Raman spectrum and those of A2u and Eu species are active in the infrared (i.r.) spectrum. The Raman active modes are observed in frequency range 55 225 cm −1 , 50 185 cm −1 , and 45 175 cm −1 for the BiOCl, BiOBr and BiOI single crystals respectively.

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Section: Methodsmentioning

confidence: 99%

Raman Spectra of Bismuth Oxyhalide Single Crystals

Bunda¹,

Bunda²

2014

Acta Phys. Pol. A

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“…The original specimens had a dark resistivity of ρ d = 10 10 to 10 11 Ω·cm and signicant photosensitivity [1]. At a temperature 293 K the ratio ρ d /ρ ph (ρ d is the resistivity in the dark, ρ ph is the resistivity in the light) reached 10 3 .…”

Section: Resultsmentioning

confidence: 99%

“…Previous investigations on the crystal structure and morphology of BiOX crystallites showed that they usually grow in the form of platelets with the c-axis normal to the platelets. Heat conductivity measurements as a function of temperature showed that the electronic component of heat conductivity is negligibly small, since the crystals are nearly insulators in the temperature range 90300 K [1]. The BiOX single crystals are layered 2D structured materials.…”

Section: Introductionmentioning

confidence: 99%

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Anizotropy of Photoconductivity in BiOCl (X=Cl, Br, I) Single Crystals

et al. 2014

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Oxyhalides of bismuth BiOX (X = Cl, Br, I) are very interesting materials which nd various applications as X-ray luminescent screens, as anti-Stokes converters, photocatalyst, usual luminophors and as photoconductive analyzer of linear polarized radiation in the 0.24 1.2 µm spectral region. The great interest for these materials is strongly related to the inuence of dimensionality on the behaviour of physical properties (they are 2D structured materials). Bismuth oxyhalides are one of the V-VI-VII group compound semiconductors belonging to the tetragonal system. The structure of BiOX is known to have a layered structure, which is constructed by the combination of the halide ion layer and the bismuth oxygen layer. We present results of the study of photoconductivity spectra anisotropy of the BiOX single crystals.

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“…66 BiOI single crystals have been grown by chemical vapor transport, where their application as a substrate in superconductor devices was studied. 67 Electrical measurements showed that BiOI increased in conductivity by 1.65 × 10 7 S at 275 K when excited by a laser with a wavelength of 640 nm excitation, demonstrating potential as a photoactive material. 68 The most common 3D bismuth-based compounds investigated are double perovskites.…”

Section: -mentioning

confidence: 99%

Research Update: Bismuth-based perovskite-inspired photovoltaic materials

et al. 2018

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Bismuth-based compounds have recently gained interest as solar absorbers with the potential to have low toxicity, be efficient in devices, and be processable using facile methods. We review recent theoretical and experimental investigations into bismuth-based compounds, which shape our understanding of their photovoltaic potential, with particular focus on their defect-tolerance. We also review the processing methods that have been used to control the structural and optoelectronic properties of single crystals and thin films. Additionally, we discuss the key factors limiting their device performance, as well as the future steps needed to ultimately realize these new materials for commercial applications.

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Peculiarities of magnetic properties of the iodine doped bismuth-2234 high temperature superconductors

Cited by 10 publications

References 7 publications

Raman Spectra of Bismuth Oxyhalide Single Crystals

Raman Spectra of Bismuth Oxyhalide Single Crystals

Anizotropy of Photoconductivity in BiOCl (X=Cl, Br, I) Single Crystals

Research Update: Bismuth-based perovskite-inspired photovoltaic materials

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