Can halogen atoms be inserted into the YBCO system?

Goren, S. D.; Ben-Yakar, L. Frenkel; Shames, Alex; Pandyopadhayay, B.; Korn, C.; Shaked, H.; Massiot, Philippe; Perrin, Christiane; Gallier, J.; Privalov, A. F.

doi:10.1016/s0921-4534(98)00700-x

Cited by 11 publications

(2 citation statements)

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“…25 We measured the 19 F spin-lattice relaxation times in doped YBa 2 Cu 3 O 6.7 F 0.4 at various magnetic field values and temperatures. The superconducting transition temperature for this sample, as deter-mined by the ac susceptibility, was found T c Ӎ92 K. Polycrystalline ceramic sample was aligned at magnetic field of 8 T in an Oxford 360/89 superconducting magnet and fixed in epoxy.…”

Section: Resultsmentioning

confidence: 99%

Nuclear spin-lattice relaxation and spin diffusion in the mixed state of type-II layered superconductors

et al. 2000

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The theory of nuclear-spin diffusion is extended to the case of a nuclear-spin system in the type-II superconductors subjected to the external magnetic field of the intermediate range. We showed that at the beginning of the relaxation process the direct relaxation regime is implemented with nonexponential time dependence. Then the relaxation regime changes to the diffusion one. The analytical expressions are obtained for the dependencies of relaxation rate on the magnetic field value. Experiments performed on the fluorine doped Y-Ba-Cu-O system yield results in agreement with theory, both in respect of the NMR and the vortex models.

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Section: Resultsmentioning

confidence: 99%

Nuclear spin-lattice relaxation and spin diffusion in the mixed state of type-II layered superconductors

et al. 2000

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“…NMR and EPR spectroscopic methods were used to study the intercalation of halogens into the crystal lattice of YBa 2 Cu 3 O 77x . 157 The halogenation was carried out by exposing the specimens in a stream of gaseous NF 3 or CCl 4 diluted with N 2 at 573 and 523 K, respectively. The intercalated chlorine atoms are inserted in the chains between two copper atoms, while the fluorine atoms occupy the oxygen vacancies, as follows from the higher fluorine concentration in the materials with smaller oxygen indices.…”

Section: The Effect Of Halogensmentioning

confidence: 99%