کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8154181 1524773 2018 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of disorder on the anomalous Hall conductivity of Co2FeSi thin films
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effect of disorder on the anomalous Hall conductivity of Co2FeSi thin films
چکیده انگلیسی
The longitudinal resistivity and anomalous Hall resistivity of 50 nm Co2FeSi films deposited on Si (1 0 0) substrate at different temperatures have been investigated as functions of disorder. The film deposited at 450 °C has minimum disorder and the lowest temperature (Tmin ∼ 11 K) at which resistivity goes through a minimum as a function of temperature. The film with the highest disorder has the largest Tmin, residual resistivity and absolute value of resistivity at any given temperature. The resistivity data have been analyzed taking into account the contributions from electron-electron scattering, electron-phonon scattering and disorder-induced enhanced electron-electron interaction, which dominates at low temperatures. The effect of Tmin is observed in Hall resistivity for all the samples. Anomalous Hall conductivity (AHC) is extremely sensitive to the degree of disorder present in the films and has the value 180 S/cm at 300 K for the most ordered TS450 film, which tallies well with the theoretically calculated value for the Co2FeSi alloy with L21 structure. The influence of disorder on the longitudinal resistivity and anomalous Hall effect has been discussed in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 448, 15 February 2018, Pages 371-377
نویسندگان
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