We demonstrate that the growth of Fe/(Ga,Mn)As heterointerfaces can be efficiently controlled by epitaxy and that robust ferromagnetism of the interfacial Mn atoms is induced at room temperature by the proximity effect. X-ray magnetic circular dichroism and x-ray resonant reflectivity data, supported by theoretical calculations, were used to monitor both temperature and magnetic field dependence of the Mn magnetic moment in the semiconducting host. We identify distinct Mn populations, each of them with specific magnetic character.
Identifying the character of ferromagnetic Mn in epitaxial Fe/(Ga,Mn)As heterostructures / M. Sperl, F. Maccherozzi, F. Borgatti, A. Verna, G. Rossi, M. Soda, D. Schuh, G. Bayreuther, W. Wegscheider, J.C. Cezar, F. Yakhou, N.B. Brookes, C.H. Back, G. Panaccione. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 81:3(2010 Jan), pp. 035211.035211-1-035211.035211-6. [10.1103/PhysRevB.81.035211]
Identifying the character of ferromagnetic Mn in epitaxial Fe/(Ga,Mn)As heterostructures
G. Rossi;
2010
Abstract
We demonstrate that the growth of Fe/(Ga,Mn)As heterointerfaces can be efficiently controlled by epitaxy and that robust ferromagnetism of the interfacial Mn atoms is induced at room temperature by the proximity effect. X-ray magnetic circular dichroism and x-ray resonant reflectivity data, supported by theoretical calculations, were used to monitor both temperature and magnetic field dependence of the Mn magnetic moment in the semiconducting host. We identify distinct Mn populations, each of them with specific magnetic character.
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