Load-induced oxygen absorption in YBa2Cu3O6+x (YBCO)

Gerbshtein, Yu. M.; Timoshchenko, N. E.; Мурадов, А. Д.; Rakhimbekov, A. Zh.

doi:10.1134/1.1129951

Cited by 4 publications

(7 citation statements)

References 4 publications

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“…Although r Cu z+ usually depends on many factors, here we adopt that r Cu z+ in YBa 2 Cu 3 O 6+ decreases with increasing z; it is consistent with the point of view of Shaked et al [5]. In turn, experimental results represented in [34] demonstrate that the transverse load on the CuO  layer "focuses" on the copper ions, "bypassing" the ions of oxygen. This means that strength characteristics as well as the lattice parameter c are entirely determined by the nature of bonds in the structural chains passing through the Cu(1) sites along the c direction [see Fig.…”

Section: Modeling Of the C( ) Dependence Relationship Between Thesupporting

confidence: 84%

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On the room-temperature aging effects in YBa 2 Cu 3 O 6+δ

Фетисов¹,

Кожина²,

Эстемирова³

et al. 2015

Physica C: Superconductivity and its Applications

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a b s t r a c tThe aging effects in YBa 2 Cu 3 O 6+d have been investigated on the low-speed quenched samples in contrast to other similar studies where the high-speed quenched samples were examined. In the framework of the investigation, XPS analysis has been conducted for the samples stored after quenching for the specified times s and a detailed experimental dependence of the YBa 2 Cu 3 O 6+d lattice parameters a, b, and c on both d and s has been obtained. The regime of low-speed quenching results in a threefold increase in the aging effect magnitude. Particular cases of the c(d; s) dependence are well described by a second-order polynomial with applying different coefficients for different s. The behavior c has been explained on the basis of a simple model of the Coulomb interaction between the CuO 2 and CuO d structural planes, in which the hole charge transfer from CuO d to CuO 2 takes place providing the standard level of T c in YBa 2 Cu 3 O 6+d (this level is characterized by a maximum T c of 93 K at d = 0.9). It has been demonstrated that the c(d; s) dependence is a good alternative to assessing the hole concentration in YBa 2 Cu 3 O 6+d . By analyzing the c(d; s) experimental dependence as well as the data on the hole localization in the pairs CuAO obtained by XPS, the authors have made a conclusion about the nature of observed aging effects. The latter are likely to be related to the transition of the Cu 3d 9 L À1 electron configuration to Cu 3d 8 for copper in the basal plane of YBa 2 Cu 3 O 6+d at RT.

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Section: Modeling Of the C( ) Dependence Relationship Between Thesupporting

confidence: 84%

“…2), the position of which depends on the postquench time. According to [34], the O 1s signal inherent to the oxygen ions in YBa 2 Cu 3 O 6+ (existing predominantly as O 2species) is recorded at 528.5 eV. Consequently, the stationary lowest-energy peak in the O 1s spectra in Fig.…”

Section: Xps Analysismentioning

confidence: 97%

On the room-temperature aging effects in YBa 2 Cu 3 O 6+δ

Фетисов¹,

Кожина²,

Эстемирова³

et al. 2015

Physica C: Superconductivity and its Applications

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“…Likewise, the application of external mechanical strain to an oxide shifts its oxygen chemical potential and results in the readjustment of its equilibrium oxygen content. Some illustrative experiments in this respect were reported by Gerbshtein et al , 280 who applied the load to a bulk YBa 2 Cu 3 O 6+ δ sample under different external conditions ( T , p O 2 ). Fig.…”

Section: Some Consequences Of Chemical Expansion and Its Possible Pra...mentioning

confidence: 99%

Chemical lattice strain in nonstoichiometric oxides: an overview

et al. 2022

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“…Because of the resonance interaction, the evanescent intensity is enhanced about 20-fold relative to the incident intensity. 13,14 This evanescent field is different from that found for total internal reflection (TIR) because it is the result of surface plasmons in the metal film. However, the origin is similar because the incident light cannot propagate into the aqueous phase.…”

Section: Overview Of Experimentsmentioning

confidence: 82%

“…[8][9][10] From theoretical studies it is known that this phenomenon occurs for excited fluorophores within about 200 nm of a thin continuous metallic surface, 11,12 in our case 50 nm thick silver on a glass substrate. A small number of experimental reports of SPCE have appeared, [13][14][15][16] but this phenomenon has not yet been applied to biological assays. The dipoles of the excited fluorophores coupled with surface plasmons, which are electron oscillations on the metal surface.…”

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confidence: 99%

DNA Hybridization Using Surface Plasmon-Coupled Emission

Malicka

Gryczyński

et al. 2003

Anal. Chem.

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We describe a new approach to measuring DNA hybridization using surface plasmon-coupled emission (SPCE). Excited fluorophores are known to couple with surface oscillations of electrons in thin metal films, typically 50 nm thick silver on a glass prism. These surface plasmons then radiate into the glass at a sharply defined angle determined by the emission wavelength and the optical properties of the glass and metal. This radiation has the same spectral profile as the emission spectrum of the fluorophores. We studied the emission due to Cy3-labeled DNA oligomers bound to complementary unlabeled oligomers which were themselves bound to the metal surface. Hybridization resulted in SPCE due to Cy3-DNA into the prism. Directional SPCE was observed whether the sample was illuminated from the sample side or through the glass substrate at the surface plasmon angle for the excitation wavelength. A large fraction of the total potential emission is coupled to the surface plasmons resulting in improved sensitivity. When illuminated through the prism at the surface plasmon angle, the sensitivity is increased due to the enhanced intensity of the resonance evanescent field. It is known that SPCE depends on proximity to the silver surface. As a result, changes in emission intensity are observed due to fluorophore localization even if hybridization does not affect the quantum yield of the fluorophore. The use of SPCE resulted in suppression of interfering emission from a noncomplementary Cy5-DNA oligomers due to weaker coupling of the more distant fluorophores with the surface plasmons. We expect SPCE to have numerous applications to nucleic acid analysis and for the measurement of bioaffinity reactions.

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Load-induced oxygen absorption in YBa2Cu3O6+x (YBCO)

Cited by 4 publications

References 4 publications

On the room-temperature aging effects in YBa 2 Cu 3 O 6+δ

On the room-temperature aging effects in YBa 2 Cu 3 O 6+δ

Chemical lattice strain in nonstoichiometric oxides: an overview

DNA Hybridization Using Surface Plasmon-Coupled Emission

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