کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8155900 | 1524838 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-temperature ferromagnetism of Si1âxMnx (xâ0.52â0.55) alloys
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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
The paper reports on the comprehensive study of properties of nonstoichiometric Si1âxMnx alloys slightly enriched in Mn (xâ0.51-0.55) as compared to the stoichiometric monosilicide MnSi. Mosaic type Si1âxMnx films 55-70 nm in thickness were produced by the pulsed laser deposition (PLD) method onto the single crystalline Al2O3 substrates at 340 °C. The Curie temperature TC in nonstoichiometric Si1âxMnx (xâ0.52-0.55) films exceeds room temperature, while in their stoichiometric counterpart, MnSi, the TC value does not exceed â30 Ð. The consistent data on anomalous Hall effect and transverse Kerr effect prove the global character of ferromagnetic (FM) order caused by magnetic defect formation rather than the presence of FM clusters. Ðt Mn content xâ¤0.55, the magnetization data testify to a good homogeneity in the distribution of magnetic defects without their segregation: variations of the saturation magnetization Ms do not exceed 6% in the temperature range T=10-100 Рand are well described by the Bloch law. It is also revealed that textured high-quality Si1âxMnx films with xâ0.52 and ТС~300 Рcould be formed by PLD method in the “shadow” geometry (at lower energy of deposited atoms).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 383, 1 June 2015, Pages 39-43
Journal: Journal of Magnetism and Magnetic Materials - Volume 383, 1 June 2015, Pages 39-43
نویسندگان
V.V. Rylkov, A.S. Bugaev, O.A. Novodvorskii, V.V. Tugushev, E.T. Kulatov, A.V. Zenkevich, A.S. Semisalova, S.N. Nikolaev, A.S. Vedeneev, A.V. Shorokhova, D.V. Averâ²yanov, K.Yu. Chernoglazov, E.A. Ganâ²shina, A.B. Granovsky, Y. Wang, V.Ya. Panchenko,