The origin of the strong magnetic fields observed in chemically peculiar Ap and Bp stars stars has long been debated .
The recent discovery of magnetic fields in the intermediate mass pre-main sequence Herbig Ae and Be stars links them to Ap and Bp stars , providing vital clues about Ap and Bp stars and the origin and evolution of magnetic fields in intermediate and high mass stars .
A detailed study of one young magnetic B star , HD 72106A , is presented .
This star appears to be in a binary system with an apparently normal Herbig Ae star .
A maximum longitudinal magnetic field strength of +391 \pm 65 G is found in HD 72106A , as are strong chemical peculiarities , with photospheric abundances of some elements ranging up to 100x above solar .