Interfacial spin coupling and exchange anisotropy in core–shell MnFe2O4/α-Fe2O3 nanocomposites Rajendra Mohan, Mritunjoy Prasad Ghosh, Ralph Skomski and Samrat Mukherjee Eur. Phys. J. Plus, 135 5 (2020) 413 Published online: 19 May 2020 DOI: 10.1140/epjp/s13360-020-00430-8