Raman analysis of a YBa2Cu3O7−δ thin film with oxygen depletion

Hong, Seongsik; Cheong, Hyeonsik; Park, Gwangseo

doi:10.1016/j.physc.2010.02.089

Cited by 24 publications

(6 citation statements)

References 67 publications

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“…On the contrary, the broadening and the downshift of rutile Raman peaks most likely arise from oxygen deficiency, which effectively determines the Raman lineshapes. 40,41 Peak broadening, full width at half maximum (FWHM), and downshift of the rutile Raman band located at 447 cm À1 are illustrated in Fig. 3(b) and (c).…”

Section: 36mentioning

confidence: 99%

Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies

2011

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The many applications of high energy storage devices have forged an increasing interest in research areas related to electrochemical capacitors. Here, in this work, we present a facile method for the fabrication of self-organized titania nanotubes grown by anodic oxidation of titanium foil with different subsequent heat-treatment regimes for use as binder-free working electrodes in supercapacitor applications. The capacitance of these highly ordered titania nanotubes, when exposed to a reductive atmosphere during annealing, was determined to be well above 900 mF cm À2, confirming that the capacitance contribution was pseudocapacitive in nature. The behaviour of oxygen depleted titania in the anatase to rutile (A / R) phase transformation and also in electrochemical charge storage has been studied in detail. It was found that upon the reduction of Ti 4+ to Ti 3+, with oxygen depletion of the structure, the A / R phase transformation was promoted. In addition, the fabricated electrodes showed highly reversible charge-discharge stability.

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Section: 36mentioning

confidence: 99%

Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies

2011

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“…Figure 3 shows the micro-Raman spectra of thin films at different proton radiation fluence. The peak at 116 cm −1 (Ba mode), 145 cm −1 (Cu2 mode), 238 cm −1 (Cu1 mode), 335 cm −1 (out-of-phase O2 +/O3− mode), 502 cm −1 (O4 mode), and 596 cm −1 (broken Cu-O chains) can be obvious detected in YBCO phases [24][25][26][27][28].…”

Section: Micro-raman Studiesmentioning

confidence: 97%

“…Raman spectra is a sensitive technique for qualitative evaluation of the oxygen content [26][27][28] in Cu-O chains and CuO 2 planes in orthorhombic YBCO phases. Figure 4 shows the variations in the intensity of the peak at 596 cm −1 .…”

Section: Micro-raman Studiesmentioning

confidence: 99%

Radiation effects in high-temperature YBa₂Cu₃O_7-x superconducting thin films with low-energy protons for space radiation environments

Wang

Zhao

et al. 2019

Phys. Scr.

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This paper presents the irradiation effects and microstructure evolution in YBa2Cu3O7-x (YBCO) thin films irradiated with low-energy protons. The microstructure changes can arise from atomic displacements characterized by micro-Raman spectroscopy. Providing different fluence low-proton irradiation conditions to simulate the space proton environment, the obvious properties change of the transition temperature Tc and critical current density Jc can be observed. In accordance with micro-Raman spectroscopy observations, the main components of proton-radiation-induced defects are that displacements of oxygen atoms in Cu–O chains. These oxygen defects acting as effective pinning centers for flux vortices increase the pinning force Fp and the critical current density Jc. However, a further healing process of broken Cu–O chains occurs with further proton irradiation, which leads to a weaker pinning force Fp and a decreased critical current density Jc. This work provides the damage profiles of the proton radiation on high-temperature YBCO superconducting thin films, which are extraordinarily important for the future superconductor applications in long-time space missions.

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“…In a tetragonal system, the E g mode is much more sensitive to oxygen deficiencies than the Ti-O stretching mode [31]. Therefore, the downshift of rutile Raman E g mode most likely arises from oxygen deficiency, which effectively determines the Raman line shapes [56].…”

Section: Raman Spectroscopy Analysismentioning

confidence: 99%

Effect of calcination on structural, morphological and photoelectrochemical performance of SnO2/TiO2 nanostructure films

et al. 2015

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Raman analysis of a YBa2Cu3O7−δ thin film with oxygen depletion

Cited by 24 publications

References 67 publications

Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies

Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies

Radiation effects in high-temperature YBa₂Cu₃O_7-x superconducting thin films with low-energy protons for space radiation environments

Effect of calcination on structural, morphological and photoelectrochemical performance of SnO2/TiO2 nanostructure films

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Raman analysis of a YBa2Cu3O7−δ thin film with oxygen depletion

Cited by 24 publications

References 67 publications

Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies

Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies

Radiation effects in high-temperature YBa2Cu3O7-x superconducting thin films with low-energy protons for space radiation environments

Effect of calcination on structural, morphological and photoelectrochemical performance of SnO2/TiO2 nanostructure films

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Radiation effects in high-temperature YBa₂Cu₃O_7-x superconducting thin films with low-energy protons for space radiation environments