Cu63 NMR shift and linewidth anomalies in the Tc=60 K phase of Y-Ba-Cu-O

R. E. Walstedt, W. W. Warren, R. F. Bell, R. J. Cava, G. P. Espinosa, L. F. Schneemeyer, J. V. Waszczak

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Abstract

Cu63 NMR shifts and spectra are presented for both Cu(1) and Cu(2) sites in a specimen of YBazCu3O6.64 (Tc60 K). For H along the c axis, the Cu(2) shift is not distinguishable from that reported for YBa2Cu3O7.0. For H in the a-b plane, the spin component of Cu(2) shift declines sharply as TTc. The Cu(1) shift behaves similarly, showing also a dramatic broadening at low temperatures in clearly nonmetallic behavior. Combined with anomalous T1 data reported earlier for the 60-K phase of YBa2Cu3O6+x, these results are shown to be consistent with strong and monotonically increasing antiferromagnetic correlations as T is decreased.

Original languageEnglish
Pages (from-to)9574-9577
Number of pages4
JournalPhysical Review B
Volume41
Issue number13
DOIs
StatePublished - 1 Jan 1990

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    Walstedt, R. E., Warren, W. W., Bell, R. F., Cava, R. J., Espinosa, G. P., Schneemeyer, L. F., & Waszczak, J. V. (1990). Cu63 NMR shift and linewidth anomalies in the Tc=60 K phase of Y-Ba-Cu-O. Physical Review B, 41(13), 9574-9577. https://doi.org/10.1103/PhysRevB.41.9574