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Influence of electric fields on the depolarization temperature of Mn-doped (1-x)Bi1/2Na1/2TiO3-xBaTiO(3)

Author(s)
Sapper, EvaSchaab, SilkeJo, WookGranzow, TorstenRoedel, Juergen
Issued Date
2012-01
DOI
10.1063/1.3674275
URI
https://scholarworks.unist.ac.kr/handle/201301/7542
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84855981936
Citation
JOURNAL OF APPLIED PHYSICS, v.111, no.1
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)O-3-xBa(Ti0.995Mn0.005)O-3 piezoceramics with x = 0.03, 0.06, and 0.09 (BNT-100xBT:Mn). Temperature-dependent permittivity epsilon'(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 epsilon'(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 epsilon'(T) and TSDC data reveals a systematic shift between transition temperatures obtained with the two different methods.
Publisher
AMER INST PHYSICS
ISSN
0021-8979

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