کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10726847 | 1037234 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-universal dielectric relaxation in SrFeO3 â δ
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
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چکیده انگلیسی
SrFeO3 â δ compound is prepared by the thermal decomposition method followed by ball milling. Analysis of Mössbauer spectrum and X-ray diffraction study proves the presence of multi-phase nature, i.e., Sr8Fe8O23 and Sr4Fe4O11 phases at room temperature. Furthermore, the Mössbauer spectrum at room temperature evidenced the presence of major Fe3.5+ which is the resultant of equal contributions of Fe4+ and Fe3+. The Nyquist plot at all measured temperatures (80-230 K) suggests that the dielectric response is well associated with single relaxation time (exponential parameter, nâ¼1) i.e., the Debye-type. Modulus analysis exhibits the non-universal dielectric behaviour (stretched exponential parameter, β>1) below 230 K and the Debye-type responds (βâ¼1) at and above 230 K. The Debye-type behaviour exhibited by SrFeO2.81 at around room temperature in its defect state offers a new opening for this material for multifunctional applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 378, Issue 36, 18 July 2014, Pages 2725-2728
Journal: Physics Letters A - Volume 378, Issue 36, 18 July 2014, Pages 2725-2728
نویسندگان
P. Manimuthu, R. Murugaraj, C. Venkateswaran,