کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8033275 | 1517968 | 2017 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and magnetic properties of perovskite SrMnO3 thin films grown by molecular beam epitaxy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The structural and magnetic properties of the epitaxial (0 0 1) SrMnO3 (SMO) thin film grown on (0 0 1) SrTiO3 (STO) substrate by molecular beam epitaxy (MBE) are reported. In-situ reflection high energy electron diffraction (RHEED) intensity oscillation is utilized to precisely adjust the stoichiometry by tuning the atom source shuttered time during the growth. The surface of the thin film with obvious steps and terraces is observed to be atomically flat. The epitaxial single crystal SMO thin film which is grown along the direction of (0 0 1) STO substrate is confirmed to be four-fold symmetric along the ã0 0 1ã azimuth by X-ray diffraction Ï scan. The XRD reciprocal space map indicates that the SMO thin film is effectively strained in the present thickness and is typical tetragonal crystal structure. It is found that the present SMO thin film is ferromagnetic. The factors, namely Mn3Â +-Mn4Â + double exchange coupling, oxygen vacancies and the strain, lead the SMO thin films to produce ferromagnetism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 644, 31 December 2017, Pages 57-64
Journal: Thin Solid Films - Volume 644, 31 December 2017, Pages 57-64
نویسندگان
Jiawei Bai, Jing Yang, Wenxia Dong, Yuanyuan Zhang, Wei Bai, Xiaodong Tang,