Theory Department
Max Planck Institute of Microstructure Physics
1997    
1998    
1999    
2000    
2001    
2002    
2003    
2004    
2005    
2006    
2007    
2008    
2009    
2010    
2011    
2012    
2013    
2014    
2015    
2016    
2017    
2018    
2019    
2020    
2021    
Lorite, I., Straube, B., Ohldag, H., Kumar, P., Villafuerte, M., Esquinazi, P., Rodriguez Torres, C.E., Perez de Heluani, S., Antonov, V. N., Bekenov, L. V., Ernst, A., Hoffmann, M., Nayak, S. K., Adeagbo, W.A., Fischer, G., Hergert, W.

Advances in methods to obtain and characterise room temperature magnetic ZnO
Applied Physics Letters 106, (8),pp 082406/1-5 (2015)
We report the existence of magnetic order at room temperature in Li-doped ZnO microwires after low energy H+ implantation. The microwires with diameters between 0.3 and 10 μm were prepared by a carbothermal process. We combine spectroscopy techniques to elucidate the influence of the electronic structure and local environment of Zn, O, and Li and their vacancies on the magnetic response. Ferromagnetism at room temperature is obtained only after implanting H+ in Li-doped ZnO. The overall results indicate that low-energy proton implantation is an effective method to produce the necessary amount of stable Zn vacancies near the Li ions to trigger the magnetic order.

TH-2015-05