کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1609613 1516262 2015 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Critical behavior near the paramagnetic to ferromagnetic phase transition temperature in La0.7Ca0.2Sr0.1Mn1−xCrxO3 compounds (0 < x < 0.1)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Critical behavior near the paramagnetic to ferromagnetic phase transition temperature in La0.7Ca0.2Sr0.1Mn1−xCrxO3 compounds (0 < x < 0.1)
چکیده انگلیسی
The critical behavior of the La0.7Ca0.2Sr0.1Mn1−xCrxO3 (0 < x < 0.1) was carried out by measurement of the magnetization around the Curie temperature TC. Experimental results revealed that these samples exhibit a second-order magnetic phase transition. The critical properties are investigated through various techniques such as modified Arrott plot, Kouvel-Fisher methods and critical isotherm to analyze magnetic-field dependences of magnetization. The values of critical exponents which are derived from the magnetic data, using the above methods, yield 0.24 ⩽ β ⩽ 0.25 and 1.01 ⩽ γ ⩽ 1.08 with TC in the range of 255-294 K. The critical isotherm M(TC, H) gives δ = 4.9 ± 0.1. Thus, the scaling law γ + β = δβ is fulfilled. The critical exponents obey the single scaling equation of state Mμ0H,ε=εβf±μ0H/εβ+γ, where f+ for T > TC and f− for T < TC. The estimated critical exponents are close to the tricritical mean field model for the Cr doped sample suggesting short-range interaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 631, 15 May 2015, Pages 350-354
نویسندگان
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