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Document type:
Zeitschriftenaufsatz 
Author(s):
B̈oni, P.; Shapiro, S. M.; Motoya, K. 
Title:
Magnetic Field Dependence of the Spin Dynamics in the Reentrant Spin Glass ${\mathrm{Fe}}_{70.4}$${\mathrm{Al}}_{29.6}$ 
Abstract:
The field dependence of the inelastic neutron scattering from the reentrant spin glass (RSG) Fe70.4Al29.6 is investigated below TC. In the intermediate paramagnetic phase 100 KTinvc $\simeq$200 K spin waves are induced in an applied field. The peaks broaden rapidly with increasing q and decreasing temperature. Remarkably these excitations exhibit a dispersion curve with a ``negative'' slope. In a field of 10 kOe the energy gap corresponds to a Zeeman splitting g$\mu$BH$\simeq$0.11 meV. In the sp...    »
 
Journal title:
Physical Review B 
Year:
1988 
Journal volume:
37 
Month:
jan 
Journal issue:
Pages contribution:
243