Paper
30 August 2008 From diluted magnetic semiconductors to self-organized nanocolumns of GeMn in germanium
S. Tardif, Ing-Song Yu, T. Devillers, M. Jamet, S. Cherifi, J. Cibert, A. Barski, P. Bayle-Guillemaud, E. Bellet-Amalric
Author Affiliations +
Proceedings Volume 7036, Spintronics; 703615 (2008) https://doi.org/10.1117/12.798296
Event: NanoScience + Engineering, 2008, San Diego, California, United States
Abstract
While achieving high Curie temperatures (above room temperature) in diluted magnetic semiconductors remains a challenge in the case of well controlled homogeneous alloys, several systems characterized by a strongly inhomogeneous incorporation of the magnetic component appear as promising. Incorporation of manganese into germanium drastically alters the growth conditions, and in certain conditions of low temperature Molecular Beam Epitaxy it leads to the formation of well organized nano-columns of a Mn-rich material, with a crystalline structure in epitaxial relationship with the Mn-poor Germanium matrix. A strong interaction between the Mn atoms in these nanocolums is demonstrated by x-ray absorption spectroscopy, giving rise to a ferromagnetic character as observed through magnetometry and x-ray magnetic circular dichroism. Most interesting, the magneto-transport characteristics of the whole structure strongly depend on the magnetic configuration of the nano-columns.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Tardif, Ing-Song Yu, T. Devillers, M. Jamet, S. Cherifi, J. Cibert, A. Barski, P. Bayle-Guillemaud, and E. Bellet-Amalric "From diluted magnetic semiconductors to self-organized nanocolumns of GeMn in germanium", Proc. SPIE 7036, Spintronics, 703615 (30 August 2008); https://doi.org/10.1117/12.798296
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KEYWORDS
Manganese

Germanium

Magnetism

Temperature metrology

Magnetic semiconductors

Ferromagnetics

X-ray magnetic circular dichroism

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