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Summary: Vortex structures in YBa2Cu3Q7 (invited)
6. Keimer
Department of Physics and Princeton Materials Institute, Princeton University
Princeton, New Jersey 08544 and National Institute of Standards and Technology,
Gaithersburg, Maryland 20899
J. W. Lynn and R. W. Erwin
National Institute of Standards and Technology, Gaithersburg, Maryland 20899
F. Dogan
Princeton Materials Institute and Department of Chemical Engineering, Princeton University
Princeton, New Jersey 08544
W. Y. Shih
Princeton Materials Institute, Princeton lJniversi& Princeton, New Jersey 08544
I. A. Aksay
Princeton Materials Institute and Department of Chemical Engineering, Princeton University,
Princeton, New Jersey 08544
Extensive small angle neutron scattering experiments have been conducted on the vortex system in
YBa,Cu,O, in a magnetic field range of 0.5 TsHs5 T, and with various orientations of the
magnetic field with respect to the crystallographic axes. For H parallel to the c axis, the vortex
lattice is oblique with two nearly equal lattice constants and an angle of 73" between primitive
vectors. One principal axis of the vortex lattice coincides with the (110) direction of the crystal
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