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Influence of electric fields on the depolarization temperature of Mn-doped (1-x)Bi1/2Na1/2TiO3-xBaTiO3

Sapper, Eva and Schaab, Silke and Jo, Wook and Granzow, Torsten and Rödel, Jürgen (2012):
Influence of electric fields on the depolarization temperature of Mn-doped (1-x)Bi1/2Na1/2TiO3-xBaTiO3.
In: Journal of Applied Physics, pp. 014105(1-6), 111, (1), ISSN 00218979, [Online-Edition: http://dx.doi.org/10.1063/1.3674275],
[Article]

Abstract

The transition between induced long-range order and relaxor-like behavior upon heating is investigated in lead-free (1-x)Bi1/2Na1/2(Ti0.995Mn0.005)O3-xBa(Ti0.995Mn0.005)O3 piezoceramics with x¼0.03, 0.06, and 0.09 (BNT-100xBT:Mn). Temperature-dependent permittivity e0(T) and thermally stimulated depolarization currents (TSDC) of poled samples were measured under identical heating conditions to clarify the depolarization mechanism. In both methods, the influence of electric bias fields on the transition temperature was investigated. Fields applied in the poling direction shift the transition to higher temperatures, with corresponding results in e0(T) and TSDC measurements. While the response of transition temperature to external fields displays a similar trend in all investigated compositions, the shape of TSDC is clearly connected with the composition and, hence, the crystal symmetry of the sample. Furthermore, the comparison of e0(T) and TSDC data reveals a systematic shift between transition temperatures obtained with the two different methods.

Item Type: Article
Erschienen: 2012
Creators: Sapper, Eva and Schaab, Silke and Jo, Wook and Granzow, Torsten and Rödel, Jürgen
Title: Influence of electric fields on the depolarization temperature of Mn-doped (1-x)Bi1/2Na1/2TiO3-xBaTiO3
Language: English
Abstract:

The transition between induced long-range order and relaxor-like behavior upon heating is investigated in lead-free (1-x)Bi1/2Na1/2(Ti0.995Mn0.005)O3-xBa(Ti0.995Mn0.005)O3 piezoceramics with x¼0.03, 0.06, and 0.09 (BNT-100xBT:Mn). Temperature-dependent permittivity e0(T) and thermally stimulated depolarization currents (TSDC) of poled samples were measured under identical heating conditions to clarify the depolarization mechanism. In both methods, the influence of electric bias fields on the transition temperature was investigated. Fields applied in the poling direction shift the transition to higher temperatures, with corresponding results in e0(T) and TSDC measurements. While the response of transition temperature to external fields displays a similar trend in all investigated compositions, the shape of TSDC is clearly connected with the composition and, hence, the crystal symmetry of the sample. Furthermore, the comparison of e0(T) and TSDC data reveals a systematic shift between transition temperatures obtained with the two different methods.

Journal or Publication Title: Journal of Applied Physics
Volume: 111
Number: 1
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties > Subproject D1: Mesoscopic and macroscopic fatigue in doped ferroelectric ceramics
11 Department of Materials and Earth Sciences > Material Science
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
11 Department of Materials and Earth Sciences
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 12 Jan 2012 10:47
Official URL: http://dx.doi.org/10.1063/1.3674275
Additional Information:

SFB 595 D1

Identification Number: doi:10.1063/1.3674275
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