Antiferromagnetic ordering in superconducting ${\bf YBa_2Cu_3O_{6.5}}$

Details Antiferromagnetic ordering in superconducting ${\bf YBa_2Cu_3O_{6.5}}$ Antiferromagnetic ordering in superconducting ${\bf YBa_2Cu_3O_{6.5}}$

2001-01-08

arxiv.org/abs/cond-mat/0101095v2

Physics

Condensed Matter

Superconductivity

3 figures

Scientific paper

10.1103/PhysRevLett.86.4100

Commensurate antiferromagnetic ordering has been observed in the superconducting high-$Tc$ cuprate ${\rm YBa_{2}Cu_{3}O_{6.5}}$ (${\rm T_{c}}$=55 K) by polarized and unpolarized elastic neutron scattering. The magnetic peak intensity exhibits a marked enhancement at $T_{c}$. Zero-field $\mu $SR experiments demonstrate that the staggered magnetization is not truly static but fluctuates on a nanosecond time scale. These results point towards an unusual spin density wave state coexisting with superconductivity.

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