TY - JOUR
T1 - Pyroelectric properties and electrical conductivity in samarium doped BiFeO 3 ceramics
AU - Yao, Yingbang
AU - Liu, Wenchao
AU - Mak, C. L.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the Hong Kong Polytechnic University under Grant No. GYH08.
PY - 2012/6
Y1 - 2012/6
N2 - Samarium (Sm 3+) doped BiFeO 3 (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 μC/m 2 K as the Sm 3+ doping level increased from 1 mol% to 8 mol%. Temperature dependence of the pyroelectric coefficient showed an abrupt decrease above 80 °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 ∼0.7 eV for the conduction process was found to be irrespective of the Sm 3+ doping level. On the other hand, the magnetic Néel temperature (T N) decreased with increasing Sm 3+ 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. © 2011 Elsevier Ltd. All rights reserved.
AB - Samarium (Sm 3+) doped BiFeO 3 (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 μC/m 2 K as the Sm 3+ doping level increased from 1 mol% to 8 mol%. Temperature dependence of the pyroelectric coefficient showed an abrupt decrease above 80 °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 ∼0.7 eV for the conduction process was found to be irrespective of the Sm 3+ doping level. On the other hand, the magnetic Néel temperature (T N) decreased with increasing Sm 3+ 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. © 2011 Elsevier Ltd. All rights reserved.
UR - http://hdl.handle.net/10754/562206
UR - https://linkinghub.elsevier.com/retrieve/pii/S092583881200480X
UR - http://www.scopus.com/inward/record.url?scp=84859550573&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2012.02.182
DO - 10.1016/j.jallcom.2012.02.182
M3 - Article
SN - 0925-8388
VL - 527
SP - 157
EP - 162
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -