Magnetic and chemical properties of Cr-based films grown on GaAs(001)

Details Magnetic and chemical properties of Cr-based films grown on GaAs(001) Magnetic and chemical properties of Cr-based films grown on GaAs(001)

2005-03-11

arxiv.org/abs/cond-mat/0503277v1

Physics

Condensed Matter

Materials Science

16 pages, 6 figures

Scientific paper

10.1088/0953-8984/17/43/002

We have investigated the magnetic and chemical properties of very thin Cr films, CrAs, and arsenized Cr grown by molecular beam epitaxy on Ga As (001), using x-ray photoemission spectroscopy and SQUID magnetometry. Distintic preparation procedures have been used with the purpose to undestand the origin of the ferromagneti signal observed for this system. It results that Ga segregation and chemical reactivity between Ga and Cr have negligible contribution in the formation of different thi films. A clear ferromagnetic response even at room temperature suggests the existence of a very thin interfacial layer formed that can eventually be burid during the growth process.

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