Observation of Magnetic Moments in the Superconducting State of YBa$_2$Cu$_3$O$_{6.6}$

Details Observation of Magnetic Moments in the Superconducting State of YBa$_2$Cu$_3$O$_{6.6}$ Observation of Magnetic Moments in the Superconducting State of YBa$_2$Cu$_3$O$_{6.6}$

2001-02-04

arxiv.org/abs/cond-mat/0102047v1

Phys. Rev. B 64, 012502 (2001)

Physics

Condensed Matter

Superconductivity

9 pages, and 4 figures

Scientific paper

10.1103/PhysRevB.64.012502

Neutron Scattering measurements for YBa$_2$Cu$_3$O$_{6.6}$ have identified small magnetic moments that increase in strength as the temperature is reduced below $T^\ast$ and further increase below $T_c$. An analysis of the data shows the moments are antiferromagnetic between the Cu-O planes with a correlation length of longer than 195 \AA in the $a$-$b$ plane and about 35 \AA along the c-axis. The origin of the moments is unknown, and their properties are discusssed both in terms of Cu spin magnetism and orbital bond currents.

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