This is an experiment to probe the magnetic ordering in Ba2CrO2Cr2As2 and compare the behaviour with the Sr analogue which shows a complex spin reorientation transition around room temperature assocuated with the interplay between the two Cr2+ sublattices. The different structural parameters of the compound when the Ba2+ cation is incorporated means that there will be significant differences in the exchange interactions and the separation of the two sublattices is larger. We will probe whether these differences are sufficient to make the nature of the magnetic ordering different from the Sr case.