The interfacial magnetic coupling between metallic Fe and the double-perovskite NdBaMn 2 O 6 single crystal was investigated in the heterostructure of 4-nm Pd/10-nm Fe/NdBaMn 2 O 6 . A considerable magnetic coupling effect was observed in the temperature range coincident with the magnetic phase transition of NdBaMn 2 O 6 . When the temperature was elevated above 270 K, NdBaMn 2 O 6 transformed from a state of antiferromagnetic fluctuating domains to a superparamagnetism-like (ferromagnetic fluctuation) state with high magnetic susceptibility. Concurrently, the interfacial magnetic coupling between the Fe layer and the NdBaMn 2 O 6 crystal was observed, as indicated by the considerable squareness reduction and coercivity enhancement in the Fe layer. Moreover, the presence of the Fe layer changed the magnetic structure of NdBaMn 2 O 6 from conventional 4-fold symmetry to 2-fold symmetry. These observations offer applicable insights into the mutual magnetic interaction in the heterostructures of metallic ferromagnetism/perovskite materials.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)