Borzi, R.A.; Stewart, S.J.; Mercader, R.C.; Punte, G. and Garcia, F.
Magnetic behavior of nanosized cupric oxide.
Journal of Magnetism and Magnetic Materials, 226-230(2),
The effect of the particle size and ball-mill-induced defects on the magnetic properties of cupric oxide has been assessed by magnetic measurements. Nanoparticles with an average strain < epsilon > = 0.035 and average crystallite size <D > = 9 mn show a susceptibility one order of magnitude higher than the starting material. Up to room temperature, instead of the increasing susceptibility found in bulk samples, a Curie-Weiss-like behavior is observed above the ordering temperature of ca. 230 K. (C) 2001 Elsevier Science B.V. All rights reserved.
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