Near-equimolar multi-component alloys, known as high entropy alloys (HEAs), possess potential for the development of new functional micromaterials. HEAs can be stabilised by their high number of alloying components (>4) to adopt the simple phases of pure elements rather than ordered intermetallic compounds. The phase stability may be tuned by careful alloy design, and the strategic selection of elements with the right chemical properties can lead to new combinations of structural and functional properties, which are highly desirable for magnetic thin-films. We have studied the possible elements in their tertiary form, including CoFeCr and CoFeNi thin films, to understand their basic magnetic behaviour before adding more elements to the alloys. The CoFeNi films showed unusual magnetic behaviour with thickness, and we would like to investigate this further using polarised neutrons.