NMR study of resonance above Tc in fluorinated YBa2Cu3Ox

Goren, S. D.; Korn, C.; Perrin, Christiane; Hoffmann, W.; Privalov, A. F.; Vieth, Hans‐Martin; Lüders, Klaus

doi:10.1016/s0921-4534(98)00258-5

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…The presence of at least two types of fluorine atom in different positions of the elemental lattice was detected. An NMR investigation of fluorinated Y-123 ceramics was carried out in [10]; the signal in the NMR spectrum was decomposed into two Lorentzians, which were correlated to fluorine atoms in the {CuO 2 } n layers and in positions apical to these layers.…”

Section: Bismuth-basedmentioning

confidence: 99%

NMR and EPR spectroscopic studies of fluorinated Bi-2212 HTSC

Nedil'ko¹,

Ashuev²,

Trachevsky³

et al. 2013

Chem. Met. Alloys

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NMR and EPR spectroscopy were used to analyse the structural changes caused by fluorination in Bi-2212 HTSC compounds. Synthesis of the fluorinated HTSC was carried out by a solid state method, using different fluorinating agents. The dependence of structural and superconducting properties on the nature and concentration of the fluorinating agent was explored. It was shown that substitution of fluorine for oxygen takes place in different preferred positions of the Bi-2212 lattice for different fluorinating agents; substitution in the {CuO 2 } layers, with formation of {CuO 3 F} and {CuO 2 F 2 } structural blocks, occurs in the best way when using PbF 2 , CuF 2 , BiOF and SrF 2 as fluorinating agents. An increase of T c was observed for the same fluorinating agents when added in optimal amounts.

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Section: Bismuth-basedmentioning

confidence: 99%

NMR and EPR spectroscopic studies of fluorinated Bi-2212 HTSC

Nedil'ko¹,

Ashuev²,

Trachevsky³

et al. 2013

Chem. Met. Alloys

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“…In most investigations the starting Y123 material has been oxygen-depleted (see e.g. [20,21]). Based on the analogy of causing an orthorhombic-to-tetragonal structure transition in Y123, hydrogenation and deoxygenation are considered similar, and most authors speculate that in terms of filling the conduction band with carriers, the addition of two H atoms in the Y123 structure is equivalent to the removal of one O.…”

Section: Introductionmentioning

confidence: 99%

Diagnostics of sputtering plasma variations affecting Y–Ba–Cu–O thin film growth and properties

Tsaneva

Vickers

Blamire

et al. 2004

Supercond. Sci. Technol.

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Optical emission spectroscopy and Langmuir probe measurements have been performed under varying conditions, close to those previously optimized for high-pressure on-axis DC sputter deposition of YBa 2 Cu 3 O 7−x (Y123) films. The electron temperature and density of the plasma were mapped between the target and substrate. The aim of the investigation was to discern the effect of small variations of plasma environment on film growth and thus to enable precise tuning of the deposition conditions for Y123 and YBa 2 Cu 4 O 8 (Y124) films for different applications. The input parameters varied were: Ar-to-O 2 ratio in the sputtering gas and small additions of He, H 2 or H 2 O; total pressure; target composition (Y123 or Y124); and deposition temperature T s . The films were characterized by four-point and inductive T c measurements, x-ray diffractometry, Raman spectroscopy, Auger electron spectroscopy, Rutherford back scattering, x-ray photoelectron spectroscopy, atomic force microscopy, scanning electron microscopy, and x-ray energy dispersive spectrometry. A model has been developed to account for the structural peculiarities observed in the x-ray diffractograms of hydrogen-loaded Y123 films deposited in O 2 /Ar + H 2 O presented.

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Synthesis, Structure and Superconducting/Magnetic Properties of Cu‐ and Mn‐based Oxyfluorides

Antipov

Abakumov

2010

Functionalized Inorganic Fluorides

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NMR study of resonance above Tc in fluorinated YBa2Cu3Ox

Cited by 7 publications

References 17 publications

NMR and EPR spectroscopic studies of fluorinated Bi-2212 HTSC

NMR and EPR spectroscopic studies of fluorinated Bi-2212 HTSC

Diagnostics of sputtering plasma variations affecting Y–Ba–Cu–O thin film growth and properties

Synthesis, Structure and Superconducting/Magnetic Properties of Cu‐ and Mn‐based Oxyfluorides

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