  Millisecond pulsars (MSPs) are thought to originate from low-mass X-ray
binaries (LMXBs). The discovery of eclipsing radio MSPs including redbacks and
black widows indicates that evaporation of the donor star by the MSP's
irradiation takes place during the LMXB evolution. In this work, we investigate
the effect of donor evaporation on the secular evolution of LMXBs, considering
different evaporation efficiencies and related angular momentum loss. We find
that for widening LMXBs, the donor star leaves a less massive white dwarf than
without evaporation; for contracting systems, evaporation can speed up the
evolution, resulting in dynamically unstable mass transfer and possibly the
formation of isolated MSPs.
