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Charge Long-range magnetic order Implemented by Coupling Xavier Marti, 1.Metals: AMR,GMR 2.Semiconductors 3.Insulators Standard substrates Room temperature Grown on Boston Feb2012 Institute of Physics (Prague) – University Nottingham COBRA Inter-University Eindhoven -ORNL

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Doping Temperature Xavier Marti, GaAs (Ga,Mn)AsMnAs Ferromagnetic Semiconductor

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III-VFM T C (K)AFM T N (K) FeN100 FeP115 FeAs77 FeSb GdN72 GdP15 GdAs19 GdSb27 II-VIFM T C (K)AFM T N (K) MnO122 MnS152 MnSe173 MnTe323 EuO67 EuS16 EuSe5 EuTe10 Xavier Marti, Intrinsic III-V and II-VI semiconductors Maca et al., JMMM 324, 1606 (2012)

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Large SOCLarge moment Large SOCLarge moment Schick et al., PRB 81, (2010) Xavier Marti,

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Large SOCLarge moment Large SOCLarge moment Schick et al., PRB 81, (2010) Xavier Marti, T15 Room 213 Helena Reichlova

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Large SOCLarge moment Large SOCLarge moment Schick et al., PRB 81, (2010) Xavier Marti,

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Crystal and magnetic structure: Bronger et al, Z. anorg. allg. Chem. 539, 175 (1986) THEORY Semiconductor with huge spin-orbit coupling Xavier Marti,

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InAs 4.27A 4.28A THIN FILM EPILAYERS V. Novak, et al., J. Cryst. Growth 323, 348 (2011)

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log(intensity) InAs 4.27A 4.28A THIN FILM EPILAYERS

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LiMnAs has a bandgap InAs LiMnAs 4.27A 4.28A I. Wijnheijmer et al, Appl. Phys. Lett. In press dI/dV map

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Is LiMnAs the only choice available? Xavier Marti,

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Xavier Marti, V. M. Ryzhkovsky, et al., Inorg. Mater (1995) A.E. Austin, et al., J. Appl. Phys (1962) TNTN RT

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Xavier Marti, [110] _ CuMnAs grown on GaAs

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Xavier Marti, CuMnAs grown on GaAs a b c a = b = Å c = Å GaAs, a = 5.65 Å

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Xavier Marti, TEM: Jaume Gazquez, Oak Ridge NL Growth: R. Campion, Nottingham

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Xavier Marti, TEM: Jaume Gazquez, Oak Ridge NL Growth: R. Campion, Nottingham GaAs CuMnAs

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Xavier Marti, GaAs Fe 10 nm 300 K

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GaAs CuMnAs Fe Xavier Marti, 300 K Fe/CuMnAs exchange bias

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GaAs CuMnAs Fe CuMnAs grown on GaAs Xavier Marti, 300 K Fe/CuMnAs exchange bias

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Xavier Marti, Prague : P. Wadley, H. Reichlova, M. Cukr, F. Maca, A.B. Shick, J. Masek, P. Horodyska, P. Nemec, V. Holy, J. Zemen, P. Kuzel, I. Nemec, K. Olejnik, J. Wunderlich, O. Stelmakhovych, K. Ulrihova, P. Beran, V. Novak, T. Jungwirth Nottingham : R. Campion, K. Edmonds, B. Gallagher, C.T. Foxon Eindhoven : I. Wijnheijmer, P. Koenraad ORNL: J. Gazquez, M. Varela Thanks for your attention LiMnAs CuMnAs

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