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Ferroelectrics Volume 356, 2007 - Issue 1
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SECTION C: DIELECTRIC & FERROELECTRIC PROPERTIES OF CERAMICS

Thermally Stimulated Current (TSC) Studies on Resistance Degradation of Ni-MLCC

Shinsuke Takeoka General R&D Laboratories, TAIYO YUDEN Co., Ltd., 5607-2 Nakamuroda Haruna-Machi, Gunma-Gun, Gunma, 370-3347, Japan
,
Koichiro Morita General R&D Laboratories, TAIYO YUDEN Co., Ltd., 5607-2 Nakamuroda Haruna-Machi, Gunma-Gun, Gunma, 370-3347, Japan
,
Youichi Mizuno General R&D Laboratories, TAIYO YUDEN Co., Ltd., 5607-2 Nakamuroda Haruna-Machi, Gunma-Gun, Gunma, 370-3347, Japan
&
Hiroshi Kishi General R&D Laboratories, TAIYO YUDEN Co., Ltd., 5607-2 Nakamuroda Haruna-Machi, Gunma-Gun, Gunma, 370-3347, Japan
Pages 78-84 | Received 03 Sep 2006, Accepted 08 Sep 2006, Published online: 10 Oct 2011
 
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Abstract

To avoid the influence of spontaneous polarization, thermally stimulated current (TSC) measurements of BaTiO3-based multilayer ceramic capacitors with Ni internal electrodes were performed within the paraelectric phase. We observed two TSC peaks and inferred that one of them was related to the resistance degradation according to the electromigration of oxygen vacancies. Further, we proposed that the two peaks resulted from the relaxation phenomenon of the oxygen vacancies, which migrated under dc electrical field stresses, in the grains and over the grain boundaries.

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