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EnglishMeasurements of low-temperature specific heat (1.5-25 K) in glasses of the AgI-Ag2O-B2O3 system reveal that the AgI addition to the borate network enhances the deviations of C p from a T 3 behaviour. An explanation for this is given by considering AgI as responsible for the decreasing coherence of a network where the borate host matrix preserves its local structure. The temperature dependences of C p in the whole explored range are in qualitative agreement with the predictions of the soft-potential model; the specific heat appears to be regulated from extra vibrational states having a nearly fourth-order frequency dependence which tends to become linear with increasing frequency.
| Titolo: | Low-temperature specific heats of AgI-Ag2O-B2O3 glasses |
| Autori: | |
| Data di pubblicazione: | 2002 |
| Rivista: | |
| Abstract: | Measurements of low-temperature specific heat (1.5-25 K) in glasses of the AgI-Ag2O-B2O3 system reveal that the AgI addition to the borate network enhances the deviations of C p from a T 3 behaviour. An explanation for this is given by considering AgI as responsible for the decreasing coherence of a network where the borate host matrix preserves its local structure. The temperature dependences of C p in the whole explored range are in qualitative agreement with the predictions of the soft-potential model; the specific heat appears to be regulated from extra vibrational states having a nearly fourth-order frequency dependence which tends to become linear with increasing frequency. |
| Handle: | http://hdl.handle.net/11570/1586705 |
| Appare nelle tipologie: | 14.a.1 Articolo su rivista |
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