PT Journal AU Nadeem, K Kamran, M Javed, A Zeb, F Hussain, SS Mumtaz, M Krenn, H Szabo, DV Brossmann, U Mu, X TI Role of surface spins on magnetization of Cr₂O₃ coated γ-Fe₂O₃ nanoparticles SO Solid state sciences PY 2018 BP 43 EP 48 VL 83 DI 10.1016/j.solidstatesciences.2018.07.006 LA english ER