Anomalous spectral density and two-level system-phonon coupling in an insulating magnetic glass
Open Access
- 1 January 1985
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 46 (6), 979-986
- https://doi.org/10.1051/jphys:01985004606097900
Abstract
Low temperature ultrasonic measurements on the magnetic glass (MnF 2)0.65(BaF2)0.2(NaPO3) 0.15 in the 0.1-1 GHz range give a value for the spectral density P of two level systems (TLS) two orders of magnitude smaller than usual and very large values for the TLS-phonon coupling constants γ1 and γt. Comparison with the case of the non-magnetic glass (ZnF2)0.6(BaF2)0.2(NaPO3 )0.2 suggests that these anomalous values are related to the magnetic properties of the glassKeywords
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