Browsing by Author "Wagener D."

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  • Decrease of the homogeneous width of the Tm3+ electron energy levels in TmBa2CCu3 O6+x at the superconducting transition 
    Egorov A.; Lütgemeier H.; Wagener D.; Dooglav A.; Teplov M. (1992)
    Enhanced NMR of 169Tm (I= 1 2) enhanced NMR has been studied in TmBa2Cu3O6+x, x=0, 0.2, 0.4, at temperatures 1.2-40K. The nuclear magnetic relaxation rates at T>20K increase exponentially as 1 T1(2) = R1(2)exp(-Δ/kT), with ...
  • Intrinsic paramagnetic centers in 1-2-3 superconductors 
    Teplov M.; Bakharev O.; Brom H.; Dooglav A.; Egorov A.; Krjukov E.; Marvin O.; Mukhamedshin I.; Naletov V.; Volodin A.; Wagener D.; Witteveen J. (1995)
    The169Tm "enhanced" NMR in TmBa2Cu3O6+x (x=0.5, 0.6) at temperatures below 4.2K and the63Cu(1) NQR in YBa2Cu3O6.5 at temperatures above 4.2K are used to study properties of intrinsic paramagnetic centers incorporated into ...
  • NMR studies of singlet-ground-state rare-earth ions in high-Tc superconductors 
    Bakharev O.; Dooglav A.; Egorov A.; Lütgemeier H.; Rodionova M.; Teplov M.; Volodin A.; Wagener D. (1992)
    Many of presently known high-Tc superconductors contain rare-earth (RE) ions with an even number of electrons in an unfilled 4f-shell (Pr3+, Tb3+, Ho3+, Tm3+). If the ground state of 4f-electrons is non-degenerate and ...
  • Phase separation in oxygen-deficient TmBa2Cu3O6+x superconductors 
    Teplov M.; Bakharev O.; Dooglav A.; Egorov A.; Krjukov E.; Marvin O.; Naletov V.; Volodin A.; Wagener D. (1994)
    Experiments on 169Tm "enhanced NMR" support the idea that the superconductivity in oxygen deficient 1-2-3 compounds is provided by a percolative network of S-I-S nano-sandwiches. © 1994.

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