X-ray-scattering study of the charge-density-wave structure in NbSe3 in high magnetic fields

An upper bound of Delta q/q less than or equal to 2.5x10(-3) on the magnetic-field-induced shift of the wave vector of the low temperature charge-density wave in NbSe3 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%. These limits are discussed in the context of magnetotransport experiments on NbSe3 as well as theoretical models that had predicted a magnetic-field dependence of the charge-density-wave structure.