The electronic specific heat was measured for the alloys Fe49.5Rh50.5-xIrx (x=1.5,3.0,5.0,6.5), Fe49.1 Rh50.9, and Fe52Rh48. The coefficient of the linear term, γAF, in the specific heat of antiferromagnetic alloys was observed to contain a large magnetic contribution which is attributed to the small fraction of Fe atoms occupying Rh sites of nearly zero exchange field. The measured γAF values do not seem to confirm the simple electronic nature of the first-order antiferromagnetic-ferromagnetic transition assumed by the prevalent theory.
ASJC Scopus subject areas
- Physics and Astronomy(all)