We present a study of magnetic fields in a sample of eight late-type dwarf
galaxies based on total power and polarimetric observations with the
Effelsberg radio telescope. We found that the thermal fraction of the radio
emission at 4.85 GHz is very high for these objects and reaches about 60%,
indicating a weak production of magnetic fields and associated synchrotron
emission in dwarf galaxies. The mean strengths of the total and regular
magnetic field are low, 4-7 MicroGauss and 1-3 MicroGauss, respectively.
Field strengths are similar among all observed dwarf galaxies and do not
depend on star-formation rate, global rotation or linear size. We found
that our galaxies still follow the radio-infrared correlation determined
for stronger objects, indicating that in dwarf galaxies the conditions
responsible for total radio and infrared emission are analogous to those
in large spiral galaxies. Our galaxy sample expands the radio-FIR
correlation towards the lowest luminosity values measured so far.