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 language | English |
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Article number | 011 |
Pages (from-to) | 6123-6129 |
Number of pages | 7 |
Journal | Journal of Physics Condensed Matter |
Volume | 1 |
Issue number | 35 |
DOIs | |
State | Published - 1989 |
Externally published | Yes |