کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10155482 | 1666351 | 2018 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dielectric relaxation and ac conductivity in magnetoelectric YCrO3 ceramics: A temperature dependent impedance spectroscopy analysis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Here, we report on the temperature and frequency dependent electrical conduction and dielectric behaviour of YCrO3 ceramics. Dielectric studies reveal a peak in the dielectric constant â¼230âK, suggesting presence of spin-charge coupling. Also, an additional broad peak found at â¼450âK is reminiscent of a relaxor like behaviour for YCrO3, attributed to a diffused phase transition. The nature of dc conductivity is of Arrhenius type and shows an abrupt change in the activation energy at â¼230âK and â¼450âK. The activation energy suggests that the polaronic hopping mechanism stabilizes at low temperature while, at higher temperatures, the process is associated with the diffusion of double ionized oxygen vacancies. However, ac conductivity suggests that the overlapping large polaron tunnelling conduction mechanism drives the ac conduction below 300âK and above 300âK, the conduction behaviour is consistent with the correlated barrier hopping conduction mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 16, December 2018, Pages 5359-5366
Journal: Journal of the European Ceramic Society - Volume 38, Issue 16, December 2018, Pages 5359-5366
نویسندگان
Ashish Kumar Mall, Ashish Garg, Rajeev Gupta,