کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1596903 1515731 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of manganese in ferromagnetic (Al,Mn)N films
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Role of manganese in ferromagnetic (Al,Mn)N films
چکیده انگلیسی

We have studied the (Al,Mn)N films grown by plasma-enhanced molecular beam epitaxy via Raman spectroscopy to verify how Mn atoms were incorporated into AlN lattice. In Raman spectra of (Al,Mn)N, the frequency of E2 (high) mode blueshifts. Together with XRD results, the strain calculations support the existence of the substitutional dopant. Also, an additional peak, attributed to local vibrational mode of Mn, coincides with the calculated phonon frequency on the basis of a simple model. The Raman results reveal that Mn atoms replace Al atoms at the substitutional sites in the lattice. The (Al,Mn)N films were found to exhibit insulating characteristics and ferromagnetic ordering above room temperature. These results suggest that the ferromagnetism in the (Al,Mn)N films is due to the intrinsic nature originating from the substitutional Mn within (Al,Mn)N.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 137, Issues 1–2, January 2006, Pages 11–15
نویسندگان
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