In materials where magnetic and structural transitions are coupled, a number of interesting and useful phenomena are seen, such as the giant magnetocaloric effect (MCE) and shape-memory. Ni2MnGa is a Heusler alloy that, in the bulk, shows both the shape memory effect and MCE, due to the proximity in temperature of its magnetic and structural transitions. Thin film versions of such materials are of great technological importance, for example using the observed magnetoelasticity to create efficient actuators, but the confined geometry of the thin film can alter the observed properties, sometimes rather favourably. We would therefore like to carry out a systematic reflectivity study using polarized neutrons on a thin film of Ni2MnGa as the temperature is scanned across the relevant transitions.