Finite-size effect in MnO NPs by neutrons

Antiferromagnetic order in MnO spherical nanoparticles.
C. H. Wang, S. N. Baker, M. D. Lumsden, S. E. Nagler,  W. T. Heller,  G. A. Baker, P. D. Deen, L. M. D. Cranswick, Y. Su, and A. D. Christianson
Phys. Rev. B 83, 214418 (2011)

The temperature-dependent magnetic moment
of theMnO bulk and nanoparticles of sample A