Magnetic field dependence of the spin dynamics in Fe28Cr 72

P. Boni, S. M. Shapiro

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The field dependence of the magnetic excitations in the re-entrant spin glass (RSG) Fe28Cr72 is investigated over a wide range of temperatures. The zero-field spin dynamics are anomalous not only in the spin-glass phase but also in the paramagnetic phase. In an applied field (H=8.8 kOe) spin waves are induced at low temperatures with an energy gap g mu BH approximately=0.1 meV. This observation is in marked contrast with results from Fe1-xAlx, where no gap is induced. The results suggest that the ground state of RSG is not unique.

Original languageEnglish
Article number011
Pages (from-to)6123-6129
Number of pages7
JournalJournal of Physics Condensed Matter
Volume1
Issue number35
DOIs
StatePublished - 1989
Externally publishedYes

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