The effect of oxygen plasma generated by different microwave modes on NdBa2Cu3O6+δ superconductor: structure and IR studies

Ismail, L.Z.; Youssif, M.I.; Moneim, Hussein M Abdel

doi:10.1016/s0022-3697(03)00188-4

Cited by 2 publications

(10 citation statements)

References 18 publications

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“…Plasma activation was performed under low pressure in hydrogen [40] and oxygen. [38][39][40] [38] but could not shift T c to higher values. The as-prepared samples were heated in vacuo before the plasma treatment was performed.…”

Section: Introductionmentioning

confidence: 75%

“…The highest zero resistance temperature mentioned in the work was 93 K for the YBCO sample,40 which is only slight above the value usually obtained for the non‐modified samples 48,51. The third work dealing with oxygen plasma treatment of oxide based superconductors reports on the influence on Nd‐123 superconductor and it showed that the mode of microwave plasma has an effect on the stoichiometry, the stoichiometric factor δ as well as on the crystal symmetry of the samples 39. It has turned out that in case of transverse electric mode was used, orthorhombic structured NdBa 2 Cu 3 O 6+ δ with T c,onset = 89.4 K could be achieved which indicates a positive shift of 0.8 K compared to the as‐prepared sample 39.…”

Section: Introductionmentioning

confidence: 85%

“…[39,52,[83][84][85][86] Ismail et al for example could obtain in the region 400-700 cm -1 strong changes within the transmission intensity of NdBa 2 Cu 3 O 6+d after performing oxygen plasma experiments. [39] Anyway, IR spectroscopy faces at least two problems regarding the investigation of oxide based superconductors. IR spectroscopy is due to the high penetration depths (Ͼ100 nm) insensitive to surface layers were superconductivity is supposed to take place.…”

Section: Samplementioning

confidence: 99%

“…[38] In none of the mentioned reports the changes within the oxygen content during plasma surface modification was determined. [38][39][40] …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Oxygen Plasma Effects on Zero Resistance Behavior of Yb,Er‐doped YBCO (123) Based Superconductors

Schäfer

Banko

Nordmann

et al. 2014

Zeitschrift anorg allge chemie

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Abstract. Rare-earth doped YBa 2 Cu 3 O 7-δ samples were synthesized starting from the corresponding oxides Y 2 O 3 , Yb 2 O 3 , Er 2 O 3 , CuO as well as Ba(OH) 2 by heating to 950°C under air. The doping concentrations were adjusted to 15 % Yb, 7 % Er and 20 % Yb, 15 % Er, respectively, with respect to the yttrium content. The orthogonal phased (123) YBCO ceramics were exposed to an oxygen plasma for 140 and 380 min. Zero resistance temperature (T c,0 ) was determined by measur-

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Section: Introductionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 85%

Section: Samplementioning

confidence: 99%

“…[38] In none of the mentioned reports the changes within the oxygen content during plasma surface modification was determined. [38][39][40] …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oxygen Plasma Effects on Zero Resistance Behavior of Yb,Er‐doped YBCO (123) Based Superconductors

Schäfer

Banko

Nordmann

et al. 2014

Zeitschrift anorg allge chemie

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“…The oxidation contents are also dependent on the microwave modes and the plasma stability (Ismail et al, 2003). The physical properties such as energy gap and band structure can be extracted from the optical characterization of the thin films (Caglar et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

ZnO nanostructures induced by microwave plasma

Elsayed

Anad

AbdelFattah

et al. 2015

Arabian Journal of Chemistry

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Microwave induced hydrogen plasma is used to fabricate ZnO thin films at low ambient gas pressure and controlled oxygen content in the gas mixture. The emission spectra have been observed. Optical emission spectroscopy was used to identify the chemical reaction mechanism. Structural quality of the so-obtained nanoparticles was studied by X-ray diffraction (XRD) and high resolution scanning electron microscopy (SEM). SEM results showed that nanorods were formed in the process, and XRD results along with nanorod dimensions obtained from SEM are consistent with the formation of single and poly-crystalline ZnO nanorods. The alignment of these nanorods with respect to the substrates depends on the lattice mismatch between ZnO and the glass substrate. The minimum crystallite grain size as obtained from the SEM measurements was $24 nm and the average diameter is 70 nm with a length of 1-2 lm. The deposited ZnO thin films have a wide energy band gap that equals $3 eV. ª 2014 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

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The effect of oxygen plasma generated by different microwave modes on NdBa2Cu3O6+δ superconductor: structure and IR studies

Cited by 2 publications

References 18 publications

Oxygen Plasma Effects on Zero Resistance Behavior of Yb,Er‐doped YBCO (123) Based Superconductors

Oxygen Plasma Effects on Zero Resistance Behavior of Yb,Er‐doped YBCO (123) Based Superconductors

ZnO nanostructures induced by microwave plasma

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