X-ray-scattering study of the charge-density-wave structure in NbSe{sub 3} in high magnetic fields

An upper bound of {Delta}q/q{le}2.5{times}10{sup {minus}3} on the magnetic-field-induced shift of the wave vector of the low-temperature charge-density wave in NbSe{sub 3} is established by high-resolution x-ray diffraction in magnetic fields up to 10 T. The charge-density-wave order parameter is also magnetic-field independent, to within 10{percent}. These limits are discussed in the context of magnetotransport experiments on NbSe{sub 3} as well as theoretical models that had predicted a magnetic-field dependence of the charge-density-wave structure. {copyright} {ital 1998} {ital The American Physical Society}