Magnetic properties of oxide glasses containing iron and rare-earth ions

Hirofumi Akamatsu, Jun Kawabata, Koji Fujita, Shunsuke Murai, Katsuhisa Tanaka

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Measurements of fundamental magnetic properties including not only dc and ac susceptibilities but also magnetic aging effects have been performed for aluminoborate glasses with high concentrations of iron and rare-earth R3 + ions (R=Sm, Gd, and Tb) in order to give an insight into the magnetic structures and interactions in amorphous oxides containing both 3d transition metal and 4f rare-earth ions, which manifest magnetic interactions that differ from each other. We demonstrate that the antiferromagnetic interactions between iron and rare-earth ions as well as those between iron ions play a significant role for their magnetic properties, while those between rare-earth ions are of little importance. Most of the rare-earth ions remain paramagnetic even below the spin-freezing temperatures under the strong molecular field caused by the spin-glass freezing of the iron ions, as in the case of rare-earth garnet ferrites.

Original languageEnglish
Article number144408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number14
DOIs
Publication statusPublished - Oct 5 2011

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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