Report
Dose dependence of ferromagnetism in Co-implanted ZnO
| العنوان: | Dose dependence of ferromagnetism in Co-implanted ZnO |
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| المؤلفون: | Akdogan, Numan, Zabel, Hartmut, Nefedov, Alexei, Westerholt, Kurt, Becker, Hans-Werner, Goek, Safak, Khaibullin, Rustam, Tagirov, Lenar |
| المصدر: | J. Appl. Phys. 105, 043907 (2009) |
| سنة النشر: | 2008 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We have studied the structural, magnetic and electronic properties of Co-implanted ZnO (0001) films grown on Al2O3 (1120) substrates for different implantation doses and over a wide temperature range. Strong room temperature ferromagnetism is observed with magnetic parameters depending on the cobalt implantation dose. A detailed analysis of the structural and magnetic properties indicates that there are two magnetic phases in Co-implanted ZnO films. One is a ferromagnetic phase due to the formation of long range ferromagnetic ordering between implanted magnetic cobalt ions in the ZnO layer, the second one is a superparamagnetic phase, which occurs due to the formation of metallic cobalt clusters in the Al2O3 substrate. Using x-ray resonant magnetic scattering, the element specific magnetization of cobalt, oxygen and Zn was investigated. Magnetic dichroism was observed at the Co L2,3 edges as well as at the O K edge. In addition, the anomalous Hall effect is also observed, supporting the intrinsic nature of ferromagnetism in Co-implanted ZnO films. Comment: 9 pages, 11 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.3082080 |
| URL الوصول: | http://arxiv.org/abs/0807.4711 |
| رقم الانضمام: | edsarx.0807.4711 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.3082080 |
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