Room Temperature Ferromagnetic, Anisotropic, Germanium Rich FeGe(001) Alloys
National Institute of Materials Physics, Atomistilor 105b, P.O. Box MG-7, Magurele-Ilfov 077125, Romania
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Materials 2013, 6(2), 612-625; https://doi.org/10.3390/ma6020612
Received: 4 December 2012
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Revised: 30 January 2013
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Accepted: 31 January 2013
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Published: 21 February 2013
(This article belongs to the Special Issue Compound Semiconductor Materials)
Ferromagnetic FexGe1−x with x = 2%–9% are obtained by Fe deposition onto Ge(001) at high temperatures (500 °C). Low energy electron diffraction (LEED) investigation evidenced the preservation of the (1 × 1) surface structure of Ge(001) with Fe deposition. X-ray photoelectron spectroscopy (XPS) at Ge 3d and Fe 2p core levels evidenced strong Fe diffusion into the Ge substrate and formation of Ge-rich compounds, from FeGe3 to approximately FeGe2, depending on the amount of Fe deposited. Room temperature magneto-optical Kerr effect (MOKE) evidenced ferromagnetic ordering at room temperature, with about 0.1 Bohr magnetons per Fe atom, and also a clear uniaxial magnetic anisotropy with the in-plane easy magnetization axis. This compound is a good candidate for promising applications in the field of semiconductor spintronics.
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Keywords:
metal-semiconductor compounds; spintronics; surface magnetism; molecular beam epitaxy; X-ray photoelectron spectroscopy; magneto-optical Kerr effect
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MDPI and ACS Style
Lungu, G.A.; Apostol, N.G.; Stoflea, L.E.; Costescu, R.M.; Popescu, D.G.; Teodorescu, C.M. Room Temperature Ferromagnetic, Anisotropic, Germanium Rich FeGe(001) Alloys. Materials 2013, 6, 612-625. https://doi.org/10.3390/ma6020612
AMA Style
Lungu GA, Apostol NG, Stoflea LE, Costescu RM, Popescu DG, Teodorescu CM. Room Temperature Ferromagnetic, Anisotropic, Germanium Rich FeGe(001) Alloys. Materials. 2013; 6(2):612-625. https://doi.org/10.3390/ma6020612
Chicago/Turabian StyleLungu, George A., Nicoleta G. Apostol, Laura E. Stoflea, Ruxandra M. Costescu, Dana G. Popescu, and Cristian M. Teodorescu. 2013. "Room Temperature Ferromagnetic, Anisotropic, Germanium Rich FeGe(001) Alloys" Materials 6, no. 2: 612-625. https://doi.org/10.3390/ma6020612
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