دورية أكاديمية
Research Update: Strain and composition effects on ferromagnetism of Mn0.05Ge0.95 quantum dots
| العنوان: | Research Update: Strain and composition effects on ferromagnetism of Mn0.05Ge0.95 quantum dots |
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| المؤلفون: | Liming Wang, Tao Liu, Quanjie Jia, Zhi Zhang, Dongdong Lin, Yulu Chen, Yongliang Fan, Zhenyang Zhong, Xinju Yang, Jin Zou, Zuimin Jiang |
| المصدر: | APL Materials, Vol 4, Iss 4, Pp 040701-040701-9 (2016) |
| بيانات النشر: | AIP Publishing LLC, 2016. |
| سنة النشر: | 2016 |
| المجموعة: | LCC:Biotechnology LCC:Physics |
| مصطلحات موضوعية: | Biotechnology, TP248.13-248.65, Physics, QC1-999 |
| الوصف: | Mn0.05Ge0.95 quantum dots (QDs) samples were grown by molecular beam epitaxy on Si substrates and 15-nm-thick fully strained Si0.8Ge0.2 virtual substrates, respectively. The QDs samples grown on the Si0.8Ge0.2 virtual substrates show a significant ferromagnetism with a Curie temperature of 227 K, while the QDs samples grown on the Si substrates are non-ferromagnetic. Microstructures of the QDs samples were characterized by high resolution transmission electron microscopy and synchrotron radiation X-ray diffraction. Interdependence between microstructure and ferromagnetism of Mn-doped Ge QDs was investigated. For the QDs sample grown on the strained Si0.8Ge0.2 virtual substrate, although the ferromagnetic phase Mn5Ge3 clusters were found to be formed in small dome-shaped dots, the significant ferromagnetism observed in that sample is attributed to ferromagnetic phase Mn-doped large dome-shaped Ge QDs, rather than to the ferromagnetic phase Mn5Ge3 clusters. The fully strained Si0.8Ge0.2 virtual substrates would result in a residual strain into the QDs and an increase in Ge composition in the QDs. Both consequences favor the formations of ferromagnetic phase Mn-doped Ge QDs from points of view of quantum confinement effect as well as Mn doping at substitutional sites. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2166-532X |
| Relation: | https://doaj.org/toc/2166-532X |
| DOI: | 10.1063/1.4945657 |
| URL الوصول: | https://doaj.org/article/5d81a883f88e428ebbde2326e8d9742b |
| رقم الأكسشن: | edsdoj.5d81a883f88e428ebbde2326e8d9742b |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Scitation. 
Full Text Finder | تدمد: | 2166532X |
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| DOI: | 10.1063/1.4945657 |