SUPERPARAMAGNETIC NANOPARTICLES AND CLUSTERS OF A FEW FE ATOMS IN AMORPHOUS FE0.33ZR0.67 ALLOYS uri icon

abstract

  • A paramagnetic amorphous Fe0.33Zr0.67 alloy has been studied with Mossbauer spectroscopy and SQUID magnetometry. Low-field magnetization measurements revealed the existence of superparamagnetic nanoparticles of thousands of mu B embedded in the alloy with a blocking temperature of 50 K. A saturation of local moments (15.9 mu B), possibly clusters of a few Fe ions, is observed at 4.6 K around 10 kOe. The temperature dependence of the high-field magnetic susceptibility of Fe0.33Zr0.67 is interpreted with Curie's law for these Fe clusters and nanoparticles.

published proceedings

  • JOURNAL OF PHYSICS-CONDENSED MATTER

author list (cited authors)

  • RHIE, K., NAUGLE, D. G., O, B. H., MARKERT, J. T., MORRISH, A. H., & ZHOU, X. Z.

citation count

  • 6

complete list of authors

  • RHIE, K||NAUGLE, DG||O, BH||MARKERT, JT||MORRISH, AH||ZHOU, XZ

publication date

  • April 1995