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  1. No Access

    Chapter and Conference Paper

    Investigation of Non-Thermal Process in the Dynamics of Photo-Induced FMR in (Ga, Mn)As

    We report experimental results which indicate the contribution of non-thermal process in photo-induced ferromagnetic resonance (FMR) in (Ga, Mn)As excited by weak, fs laser pulses.

    T. Matsuda, H. Munekata in Ultrafast Magnetism I (2015)

  2. No Access

    Chapter and Conference Paper

    Photo-induced Ferromagnetic Resonance in Systems Incorporating Magnetic Junctions

    Careful analysis of experimental data obtained from photo-induced ferromagnetic resonance (ph-FMR) for systems incorporating magnetic junctions shed light on spin dynamics associated with interface magnetism. ...

    H. Munekata in Ultrafast Magnetism I (2015)

  3. No Access

    Chapter and Conference Paper

    Laser-Induced Spin Dynamics in Ferromagnetic (In,Mn)As at Magnetic Fields up to 7 T

    Laser-induced spin dynamics in (In,Mn)As is studied in magnetic fields up to 7 T. It is shown that a laser pulse can effectively excite homogenous spin precession in this compound at the frequency of the ferro...

    R. R. Subkhangulov, H. Munekata, Th. Rasing, A. V. Kimel in Ultrafast Magnetism I (2015)

  4. No Access

    Chapter and Conference Paper

    Dependence of Layer Thickness on Magnetism and Electrical Conduction in Ferromagnetic (In,Mn)As/GaSb Heterostructures

    Relatively thick, ferromagnetic (In,Mn)As layers of up to around 150 nm with Curie temperature of T c = 35 K were prepared successfully by molecular beam epitaxy. Dependencies of (In,Mn)As...

    H. Nose, S. Sugahara, H. Munekata in Narrow Gap Semiconductors 2007 (2008)

  5. No Access

    Article

    Room-Temperature Photomagnetic Effect of Fe3Ga4 Grown on GaAs Substrates

    Ga–As–Fe composite films prepared by molecular beam epitaxy at 600°C on GaAs(100) substrates with the stacking sequence of [100-nm GaAs/50-nm Fe3Ga2− x A...

    A. T. M. K. Jamil, H. Noguchi, K. Shiratori, T. Kondo… in Journal of Superconductivity (2005)

  6. No Access

    Article

    Photoinduced Magnetization Rotation and Precessional Motion of Magnetization in Ferromagnetic (Ga,Mn)As

    Dynamics of photoinduced magnetization have been studied in ferromagnetic semiconductor (Ga,Mn)As thin films by time-resolved polar Kerr rotation. Ultrafast (∼150 fs) magnetization rotation has been realized u...

    A. Oiwa, H. Takechi, H. Munekata in Journal of Superconductivity (2005)

  7. No Access

    Article

    Ultrafast Optical Manipulation of Ferromagnetic Order in InMnAs/GaSb

    We have performed a two-color time-resolved magneto-optical Kerr effect (MOKE) study of a ferromagnetic InMnAs/GaSb heterostructure. We observed ultrafast photoinduced changes in the MOKE signal induced by a l...

    J. Wang, G. A. Khodaparast, J. Kono, T. Slupinski, A. Oiwa… in Journal of Superconductivity (2003)

  8. No Access

    Article

    Rotation of Ferromagnetically Coupled Mn Spins in (Ga,Mn)As by Hole Spins

    We present experimental data obtained from ferromagnetic p-(Ga,Mn)As layers that indicate the collective rotation of ferromagnetically coupled Mn spins by optically generated spin-polarized holes through the p...

    H. Munekata, A. Oiwa, Y. Mitsumori, R. Moriya, T. Slupinski in Journal of Superconductivity (2003)

  9. No Access

    Article

    Manifestation of Local Magnetic Domain Reversal by Spin-Polarized Carrier Injection in (Ga,Mn)As Thin Films

    Recently, we have reported that the spin-polarized holes generated by the irradiation with circularly polarized light can change the magnetization orientation of III–V ferromagnetic semiconductor (Ga,Mn)As via...

    A. Oiwa, R. Moriya, Y. Mitsumori, T. Słupinski, H. Munekata in Journal of Superconductivity (2003)

  10. No Access

    Article

    Theory of Cyclotron Resonance and Magneto-Optics in n- and p-Type InMnAs in Ultra-high Magnetic Fields

    We present a theory for the electronic and optical properties of n- and p-type In1−x Mn x As in ultra-high magnetic fields. An eight-band effective mass model based on the Pidgeo...

    G. D. Sanders, Y. Sun, C. J. Stanton, G. A. Khodaparast… in Journal of Superconductivity (2003)

  11. No Access

    Article

    Alloying (In,Mn)As and (Ga,Mn)As: Ferromagnetic (In,Ga,Mn)As Lattice-Matched to InP

    An effect of alloying two ferromagnetic semiconductors (In,Mn)As and (Ga,Mn)As on the ferromagnetic properties of resultant (In,Ga,Mn)As alloys is reported. For conditions close to lattice-matching to InP subs...

    T. Slupinski, H. Munekata, A. Oiwa in Journal of Superconductivity (2003)

  12. No Access

    Article

    Cyclotron Resonance of Electrons and Holes in Paramagnetic and Ferromagnetic InMnAs-Based Films and Heterostructures

    We have studied the cyclotron resonance of electrons and holes in various types of InMnAs-based structures at ultrahigh magnetic fields. Our observations, in conjunction with an eight-band effective mass model...

    G. A. Khodaparast, M. A. Zudov, J. Kono, Y. H. Matsuda… in Journal of Superconductivity (2003)

  13. No Access

    Article

    (Ga,Mn)N : Sn Epilayers

    We have prepared (Ga,Mn)N : Sn epilayers on sapphire(0001) substrates by RF-plasma assisted molecular beam epitaxy. We found that codo** with Sn enhances the incorporation of Mn into a GaN host crystal. With...

    T. Kondo, H. Owa, H. Munekata in Journal of Superconductivity (2003)

  14. No Access

    Article

    Photoinduced Magnetism in Semiconductor-Based Structures

    This paper reviews the most recent progress in the studies of photocarrier-induced magnetism, phototunable magnetization reversal, as well as photoenhanced magnetization in the magnetic alloy semiconductor het...

    H. Munekata in Journal of Superconductivity (2001)

  15. No Access

    Article

    Growth and optical properties of strained (AIP)n (GaP)n short-period superlattices

    Biaxial tensile strain is introduced into (AlP)n(GaP)n superlattices (SLs) by growing the SLs on slightly lattice-mismatched InGaP intermediate layers on GaP(00l) substrates. A significant enhancement of photolum...

    K. Shiraishi, J. Kitamura, K. Hara, H. Munekata… in Journal of Electronic Materials (1996)

  16. No Access

    Article

    X-Ray Scattering and Absorption Studies of MnAs Thin Films Grown by MBE on GaAs (001) Substrates

    MnAs thin films grown on GaAs (001) substrates by molecular beam epitaxy have been studied by grazing incidence x-ray scattering (GIXS), x-ray diffraction (XRD) and extended x-ray absorption fine structure (EX...

    S. Huang, Z. H. Ming, Y. L. Soo, Y H. Kao, M. Tanaka… in MRS Online Proceedings Library (1995)

  17. No Access

    Article

    Investigation of Local Structures Around Mn Atoms in In1-xMnxAs Diluted Magnetic Semiconductors Using Exafs

    Extended x-ray absorption fine structure (EXAFS) techniques have been used to investigate the local structures in Inl-xMnxAs films grown by molecular beam epitaxy (MBE) under different processing conditions. For ...

    Y. L. Soo, S. W. Huang, Z. H. Ming, Y. H. Kao… in MRS Online Proceedings Library (1994)

  18. No Access

    Article

    Formation of Mn-As Centers in In1−xMnx as Diluted Magnetic Semiconductors

    XAFS spectra at the Mn K-edge were obtained for films of In1−xMnxAs (0.0014 ≤ x ≤ 0.12) grown by MBE method at two different substrate temperatures Ts = 200–210 °C and Ts = 280–300 °C. It has been found that Mn-A...

    A. Krol, Y. L. Soo, Z. H. Ming, Y. H. Kao, H. Munekata… in MRS Online Proceedings Library (1992)

  19. No Access

    Article

    Reactive Ion Etching of GaSb, (Ai,Ga)Sb, and InAs for Novel Device Applications.

    -Although a variety of novel device proposals for GaSb/(Al,Ga)Sb/InAs heterostructures have been made, relatively little is known about processing these materials. We have studied the reactive ion etching char...

    D. C. La Tulipe, D. J. Frank, H. Munekata in MRS Online Proceedings Library (1990)