Мақола

Determination of atom charge states in lattices of superconducting metal oxides of copper by 61Cu(61Ni) and 67Cu(67Zn) emission Mössbauer spectroscopy

G. A. BordovskyHerzen State Pedagogical University of Russia, St. Petersburg, RussiaА. В. МарченкоHerzen State Pedagogical University of Russia, St. Petersburg, RussiaА. В. НиколаеваHerzen State Pedagogical University of Russia, St. Petersburg, RussiaП. П. СерегинHerzen State Pedagogical University of Russia, St. Petersburg, RussiaК. У. БобохужаевNational University of Uzbekistan, Tashkent, Uzbekistan

Glass Physics and Chemistryjournal2015en

ABI

Аннотация

It is shown that for the majority of metal oxides of divalent copper a linear correlation exists between the quadrupolar couplings on 63Cu nuclei (C Cu) (NMR data for the 63Cu isotope), on one side, and 67Zn (C Zn) and 61Ni nuclei (C Ni) (emission Mössbauer spectroscopy data on the 67Cu (67Zn) and 61Cu (61Ni) isotopes), on the other side. This finding indicates the similarity of copper electronic structures in these lattices. Analogous linear relationships exist between C Cu, C Ni, and the calculated values of the principal component of the crystalline electric field gradient for the compounds of divalent copper. The mentioned dependences allow estimating the validity of the models for the charge distribution on the lattice sites proposed for superconducting ceramics.

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Мавзулар

Physics of Superconductivity and Magnetism Rare-earth and actinide compounds Superconductivity in MgB2 and Alloys

Идентификаторлар

DOI: 10.1134/s1087659615020030

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