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Cu(2) nuclear resonance evidence for an original magnetic phase in aged 60K-superconductors RBa2Cu3O6+x (R=Tm,Y)

A. V. Dooglav·H. Alloul·O. N. Bakharev·C. Berthier·A. V. Egorov·M. Horvatic·E. V. Krjukov·P. Mendels·Yu. A. Sakhratov·M. A. Teplov
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Abstract

It is widely believed that the long-range antiferromagnetic order in the RBa2Cu3O6+x compounds (R=Y and rare earths except of Ce, Pr, Tb) is totally suppressed for the oxygen index x>0.4 (AFM insulator-metal transition). We present the results of the copper NQR/NMR studies of aged RBa2Cu3O6+x (R=Tm,Y) samples showing that a magnetic order can still be present at oxygen contents x up to at least 0.7 and at temperatures as high as 77K.

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A. V. Dooglav, H. Alloul, O. N. Bakharev, C. Berthier, A. V. Egorov, M. Horvatic, E. V. Krjukov, P. Mendels, Yu. A. Sakhratov, M. A. Teplov. 1997-12-03. Cu(2) nuclear resonance evidence for an original magnetic phase in aged 60K-superconductors RBa2Cu3O6+x (R=Tm,Y). https://doi.org/10.1103/physrevb.57.11792

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