کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8153524 | 1524765 | 2018 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural, multiferroic, dielectric and magnetoelectric properties of (1-x)Ba0.85Ca0.15Ti0.90Zr0.10O3-(x)CoFe2O4 lead-free composites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
High performance lead-free multiferroic composites with strong magnetoelectric coupling effect are desired to replace lead-based ceramics in multifunctional device applications due to increasing environmental issues. We report crystal structure, ferroelectric, magnetic, dielectric and magnetoelectric properties of (1-x)Ba0.85Ca0.15Ti0.90Zr0.10O3-(x)CoFe2O4 (BCTZ-CFO) lead-free composites with xâ¯=â¯0.1, 0.3, 0.5, 0.7 and 0.9 synthesized by chemical solution method. BCTZ power was synthesized by sol-gel method while CFO was prepared by metallo-organic decomposition (MOD) method. The XRD results confirm successful formation of the BCTZ-CFO composites without presence of any impurity phase. At room temperature, the BCTZ-CFO composites show multiferroic behavior characterized by ferroelectric and ferromagnetic hysteresis curves. The composite having 10â¯wt% of CFO exhibited maximum polarization, remnant polarization and coercive field of Psâ¯â¼â¯5.1â¯ÂµC/cm2, Prâ¯â¼â¯1.4â¯ÂµC/cm2 and Ecâ¯â¼â¯11.6â¯kV/cm respectively. The BCTZ-CFO composite with 90â¯wt% of CFO incorporation exhibits improved ferromagnetic properties with Msâ¯â¼â¯32â¯emu/g, Mrâ¯â¼â¯11.7â¯emu/g and Hcâ¯â¼â¯504â¯Oe. MÓ§ssbauer spectra analysis show two sets of six-line hyperfine patterns for BCTZ-CFO composites, indicating the presence of Fe3+ ions in both A and B sites. Increasing BCTZ content was found to decrease the hyperfine field strength at both sites and is consistent with the decreasing magnetic moment observed for the samples. The maximum dielectric constant value εâ²â¯â¼â¯678 is obtained at 1â¯MHz for composite with 10â¯wt% of CFO phase. The results indicate that the BCTZ-CFO composites are potential lead-free room temperature multiferroic systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 456, 15 June 2018, Pages 292-299
Journal: Journal of Magnetism and Magnetic Materials - Volume 456, 15 June 2018, Pages 292-299
نویسندگان
N.S. Negi, Rakesh Kumar, Hakikat Sharma, J. Shah, R.K. Kotnala,