Antiferromagnetic MnO nanoparticles with ferrimagnetic Mn3O4 shells: Doubly inverted core-shell systemRemoveA. E. Berkowitz, G. F. Rodriguez, J. I. Hong, K. An, T. Hyeon, N. Agarwal, D. J. Smith, and E. E. FullertonPhys. Rev. B 77, 024403 (2008)
