  Magnetic moments of free and bound deuteron and triton are considered and new
results for their magnetic moments (in units of that of the proton) and their g
factors are presented. We report on a measurement with medium-pressure hydrogen
deuteride (HD) at 10 atm, which is to be compared with the previous measurement
done at 100 atm. We confirm that the high pressure used in former experiments
caused no systematic effects at a level of 10 ppb. We also reexamined a
theoretical uncertainty related to screening effects in HD and HT molecules and
found that previously it was underestimated. The medium-pressure result
obtained for the free deuteron mu_d/mu_p=0.307 012 206 5(28) with a fractional
uncertainty of 9.1 * 10^-9 is free of systematic effects related to former
high-pressure experiments. The reevaluated result for triton is mu_t/mu_p=1.066
639 908(10) with a fractional uncertainty of 9.3 * 10^-9.
