Pair breaking effects of atomic disorder induced in YBa2Cu3O7 by electron irradiation
作者： A. Hofmann , H. Kronmüller , N. Moser , R. Reisser , P. Schüle
DOI: 10.1016/0921-4534(88)90016-0
关键词: Paramagnetism 、 Electron 、 Condensed matter physics 、 Electron beam processing 、 Materials science 、 Curie constant 、 Density of states 、 Irradiation 、 Fermi level 、 Magnetic moment
摘要: Irradiation effects of electrons at very low temperatures (Tirr<40 K, 2.7 MeV) on the DC-susceptibility χDC above Tc YBa2Cu3O7 have been studied by means a SHE SQUID magnetometer. Contrary to nonirradiated stoichiometric samples which nearly temperature independent paramagnetic susceptibility, χDC, between 100°C and 300°C, specimens irradiated with doses 4 × 1019 e-/cm2 show distinct Curie-type behaviour due formation local magnetic moments, superimposed part. By annealing up 500 K recovering contribution takes place in similar way as that Tc. The Pauli susceptibility remains constant during irradiation, indicating there is, contrary A15-superconductors, no significant reduction density states Fermi level. correlated Curie suggests pair breaking mechanism radiation induced moment.
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