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物理学报. 2003, 52(12): 3125-3129.
doi: 10.7498/aps.52.3125.
钇掺杂钨酸铅晶体中的极化子和导纳谱
- 收稿日期: 2003-03-12
- 修回日期: 2003-04-21
- 刊出日期: 2003-06-05
English Abstract
Polaron and admittance spectroscopy of yttrium-doped lead tungstate single cryst al
- Received Date:
12 March 2003
- Accepted Date:
21 April 2003
- Published Online:
05 June 2003
Abstract: Both DC and AC conductance of Y-doped PbWO4 single crystal have been studied over a temperature range from ambient temperature to 160 ℃. Results of DC conductivity indicate that the carriers in PbWO4 in such a temperature ra nge are polarons other than ions, for a transition of polarons from energy band conduction to hopping conduction which characterized by a minimum of conductivity has been observed. AC conductivity obtained from admittance analysis is almost 3-orders higher than that of DC analysis, it ought to be mainly ascribed to the effect of dielectric. If conductivity and dielectric constant of a given system change together with frequency, AC measurement can only yield a total admittance spectrum, but is unable to separate conductivity spectrum from dielectric spectrum.
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