Coherently dedispersed polarimetry of millisecond pulsars

We present a large sample of high-precision, coherently dedispersed polariz ation profiles of millisecond pulsars (MSPs) at frequencies between 410 and 1414 MHz. These data include the first polarimetric observations of severa l of the pulsars and the first low-frequency polarization profiles for othe rs. Our observations support previous suggestions that the pulse shapes and polarimetry of MSPs are more complex than those of their slower relatives. An immediate conclusion is that polarimetry-based classification schemes p roposed for young pulsars are of only limited use when applied to milliseco nd pulsars.