X-ray-scattering study of copper magnetism in nonsuperconducting PrBa 2 Cu 3 O </mml:…
2000; American Physical Society; Volume: 61; Issue: 2 Linguagem: Inglês
10.1103/physrevb.61.1251
ISSN1095-3795
AutoresJ. P. Hill, D. F. McMorrow, A. T. Boothroyd, A. Stunault, C. Vettier, L. E. Berman, M. v. Zimmermann, Th. Wolf,
Tópico(s)Advanced Condensed Matter Physics
ResumoX-ray magnetic scattering from ordered Cu spins has been observed in a high-${T}_{c}$ compound. The measurements were made on the anomalous cuprate ${\mathrm{PrBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{6.92}$ with x-ray photon energies tuned in the vicinity of the Cu K edge. The high wave-vector resolution enabled us to observe an incommensurate double-$Q$ Cu spin structure below ${T}_{\mathrm{Pr}}=19$ K that forms as a result of coupling between the magnetically ordered Cu and Pr sublattices. Above ${T}_{\mathrm{Pr}},$ the Cu ordering is commensurate, ruling out static spin-charge stripe order as an explanation for the absence of superconductivity in this material.
Referência(s)