PrBa2Cu3O7−y investigated by141Pr Mössbauer spectroscopy

Abstract

PrBa2Cu3O7-delta investigated by 141Pr Mossbauer spectroscopyMoolenaar, A.A.; Gubbens, P.C.M.; van Loef, J.J.; Menken, M.J.V.; Menovsky, A.A.

Characterization of localized hole states inPr1+xBa2−xPieper1, Wiekhorst2, Wolf3 2000Phys. Rev. B210100View full textAdd to dashboardCite

“…The observation of a Pr-moment is consistent with the interpretation presented above if the state Pr 3+ carries this moment, and the existence of two magnetically different sites has been considered much earlier as a possible explanation for the broad 141 Pr-Mössbauer spectra. 79 The fact that T N increases with the concentration of the nonmagnetic site Pr IV is, however, in clear contradiction to the concept that Pr-Pr exchange is the origin of the transition. Even the fact that the transition occures at all would be surprising at y = 1, because the magnetism of the RE-sublattice is known to be strongly 2-dimensional, and the percolation threshold for the square lattice with nearest neighbor exchange is only 0.5928.…”

“…0.9µB . 79,40,41 The transition is very sensitive to sample quality, Uma et al observed a transition in two steps in high-purity crystals grown in BaZrO3-crucibles. 42 In fig.…”