کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1607191 | 1516229 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Short-range ferromagnetic order in perovskite manganite La0.62Er0.05Ba0.33Mn0.95Fe0.05O3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The critical phenomena of a high quality La0.62Er0.05Ba0.33Mn0.95Fe0.05O3 sample are comprehensively studied using dc magnetometry in the vicinity of paramagnetic to ferromagnetic second order phase transition. The critical exponents are estimated through various techniques such as Modified Arrott plot, Kouvel-Fisher plot and critical isotherm technique. In comparison with the values given by standard models, the critical exponents β, γ and δ in our case are close to those expected from the three-dimensional Ising model (β = 0.322 ± 0.004, γ = 1.175 ± 0.002 and δ = 4.415 ± 0.02 at an average TC = 256.53 ± 0.06 K). This proves the existence of a short-range ferromagnetic order in La0.62Er0.05Ba0.33Mn0.95Fe0.05O3. Thus, the scaling law γ + β = δβ is fulfilled. With these critical exponents, the isothermal magnetization data around TC fall into two branches of a universal function M(H,âε) = |ε|βâf±(H/|ε|β+γ) where ε = (TâTC)/TC is the reduced temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 664, 15 April 2016, Pages 657-663
Journal: Journal of Alloys and Compounds - Volume 664, 15 April 2016, Pages 657-663
نویسندگان
Mounira Abassi, Za Mohamed, J. Dhahri, E.K. Hlil,