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Summary: Spin susceptibility in underdoped YBa2Cu3O6¿x
H. F. Fong
Department of Physics, Princeton University, Princeton, New Jersey 08544
P. Bourges and Y. Sidis
Laboratoire Le´on Brillouin, CEA-CNRS, CE Saclay, 91191 Gif sur Yvette, France
L. P. Regnault
CEA Grenoble, De´partement de Recherche Fondamentale sur la matie`re Condense´e, 38054 Grenoble Cedex 9, France
J. Bossy
CNRS-CRTBT, BP 166, 38042 Grenoble Cedex 9, France
A. Ivanov
Institut Laue-Langevin, 156X, 38042 Grenoble Cedex 9, France
D. L. Milius and I. A. Aksay
Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544
B. Keimer
Department of Physics, Princeton University, Princeton, New Jersey 08544
and Max-Planck-Institut fu¨r Festko¨rperforschung, 70569 Stuttgart, Germany
Received 5 October 1999
We report a comprehensive polarized and unpolarized neutron scattering study of the evolution of the
dynamical spin susceptibility with temperature and doping in three underdoped single crystals of the
YBa2Cu3O6 x high temperature superconductor: YBa2Cu3O6.5 (Tc 52 K), YBa2Cu3O6.7 (Tc 67 K), and
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