Pyroelectric properties and electrical conductivity in samarium doped BiFeO 3 ceramics

Y. B. Yao; W. C. Liu; Chee Leung Mak

doi:10.1016/j.jallcom.2012.02.182

Pyroelectric properties and electrical conductivity in samarium doped BiFeO 3 ceramics

Y. B. Yao, W. C. Liu, Chee Leung Mak

Research output: Journal article publication › Journal article › Academic research › peer-review

44 Citations (Scopus)

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 μC/m2K as the Sm3+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 Sm3+doping level. On the other hand, the magnetic Néel temperature (TN) 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.

Original language	English
Pages (from-to)	157-162
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	527
DOIs	https://doi.org/10.1016/j.jallcom.2012.02.182
Publication status	Published - 25 Jun 2012

Keywords

BiFeO 3
Pyroelectric
Sm doping 3+

ASJC Scopus subject areas

Mechanical Engineering
Mechanics of Materials
Materials Chemistry
Metals and Alloys

More information

10.1016/j.jallcom.2012.02.182

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title = "Pyroelectric properties and electrical conductivity in samarium doped BiFeO 3 ceramics",

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 μC/m2K as the Sm3+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 Sm3+doping level. On the other hand, the magnetic N{\'e}el temperature (TN) 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.",

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AU - Yao, Y. B.

AU - Liu, W. C.

AU - Mak, Chee Leung

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Y1 - 2012/6/25

N2 - 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 μC/m2K as the Sm3+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 Sm3+doping level. On the other hand, the magnetic Néel temperature (TN) 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.

AB - 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 μC/m2K as the Sm3+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 Sm3+doping level. On the other hand, the magnetic Néel temperature (TN) 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.

KW - BiFeO 3

KW - Pyroelectric

KW - Sm doping 3+

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DO - 10.1016/j.jallcom.2012.02.182

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SN - 0925-8388

VL - 527

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EP - 162

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Pyroelectric properties and electrical conductivity in samarium doped BiFeO 3 ceramics

Abstract

Keywords

ASJC Scopus subject areas

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