کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1622982 1516405 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of Sn substitution for Sb on transport and thermoelectric properties of CrSb2 at low temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
The effect of Sn substitution for Sb on transport and thermoelectric properties of CrSb2 at low temperatures
چکیده انگلیسی

The Sn doped compounds CrSb2−xSnx (0 ≤ x ≤ 0.05) were synthesized and the effect of Sn substitution for Sb on electrical resistivity, thermopower and thermal conductivity of CrSb2 were investigated from 7 K to 310 K. The results indicate that the temperature dependence of electrical resistivity for CrSb2 did not change obviously after Sn substitution for Sb. However, the magnitude of the resistivity for CrSb2−xSnx decreased monotonically with increasing Sn content. Moreover, absolute value of thermopower |S| decreased continuously with increasing Sn content although its temperature behavior was not influenced substantially by Sn doping. The decrease of both the resistivity and |S| could be ascribed to the increase in electron concentration caused indirectly by Sn substitution for Sb. Additionally, experiments showed that low-temperature lattice thermal conductivity (below ∼100 K) of CrSb2−xSnx generally decreased with increasing Sn content, which could be explained as an enhancement of phonon scattering by increased number of Sn atoms. The thermoelectric figure of merit, ZT, of doped compounds CrSb2−xSnx (x > 0) decreased as compared to that of un-doped CrSb2 due to substantial decrease in |S| after doping. Present results suggest that thermoelectric properties of CrSb2 cannot be enhanced by Sn substitution for Sb.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 472, Issues 1–2, 20 March 2009, Pages 400–405
نویسندگان
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