Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30276
Title: Pyroelectric properties and electrical conductivity in samarium doped BiFeO3 ceramics
Authors: Yao, YB
Liu, WC
Mak, CL 
Keywords: BiFeO3
Pyroelectric
Sm3+ doping
Issue Date: 2012
Publisher: Elsevier
Source: Journal of alloys and compounds, 2012, v. 527, p. 157-162 How to cite?
Journal: Journal of alloys and compounds 
Abstract: Samarium (Sm3+) doped BiFeO3 (BFO) ceramics were prepared by a modified solid-state-reaction method which adopted a rapid heating as well as cooling during the sintering process. The pyroelectric coefficient increased from 93 to 137 mu C/m(2) K as the Sm3+ doping level increased from 1 mol% to 8 mol%. Temperature dependence of the pyroelectric coefficient showed an abrupt decrease above 80 degrees C in all samples, which was associated with the increase of electrical conductivity with temperature. This electrical conduction was attributed to oxygen vacancy existing in the samples. An activation energy of similar to 0.7 eV for the conduction process was found to be irrespective of the Sm3+ doping level. On the other hand, the magnetic Neel temperature (T-N) decreased with increasing Sm3+ doping level. On the basis of our results, the effects of Sm doping level on the pyroelectric and electrical properties of the BFO were revealed.
URI: http://hdl.handle.net/10397/30276
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2012.02.182
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