Effect of spin disorder on magnetic properties of nanostructured Ni-ferrite

Y. D. Zhang, S. H. Ge, H. Zhang, S. Hui, J. I. Budnick, W. A. Hines, M. J. Yacaman, M. Miki

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


X-ray diffraction, transmission electron microscopy, and low temperature SQUID magnetometry were used for analyzing the effect of structural disorders on the magnetic properties of NiFe 2O 4 nanoparticles. By annealing the fine powder at different temperatures, powder samples with different particle sizes were made. Due to the surface disorders, the particle had a core or shell structure. The superexchage coupling, that created a magnetically immobilized region near the surface region with thickness significantly larger than that of the structurally inhomogeneous layer on the surface, was found to be a driving force for the magnetic configuration.

Original languageEnglish (US)
Pages (from-to)7130-7132
Number of pages3
JournalJournal of Applied Physics
Issue number11 II
StatePublished - Jun 1 2004
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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