Journal ArticleDOI
Spin wave resonance in Ga1−xMnxAs
S. T. B. Goennenwein,T. Graf,Thomas Wassner,Martin S. Brandt,Martin Stutzmann,J. B. Philipp,Rudolf Gross,Michael Krieger,K. Zürn,Paul J. Ziemann,A. Koeder,S. Frank,Wladimir Schoch,Andreas Waag +13 more
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In this paper, the authors report ferromagnetic resonance experiments on Ga1−xMnxAs thin films. For the dc magnetic field perpendicular to the sample plane, they observe up to eight distinct resonances, which they attribute to spin wave modes.Abstract:
We report ferromagnetic resonance experiments on Ga1−xMnxAs thin films. For the dc magnetic field perpendicular to the sample plane, we observe up to eight distinct resonances, which we attribute to spin wave modes. To account for the spacing of the resonances, we infer a linear gradient in the magnetic properties, which is ascribed to a linear variation of the uniaxial magnetic anisotropy with film thickness. Values of D=(1±0.4)×10−9 Oe cm2 for the spin stiffness and JMnMn≈1 meV for the exchange integral between Mn spins are obtained.read more
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Nonlocal magnetization dynamics in ferromagnetic heterostructures
TL;DR: In this article, the role of spin pumping in layered structures is discussed and the main body of the theory is semiclassical and based on a mean-field Stoner or spin-density functional picture, but quantum-size effects and electron-electron correlations are also discussed.
Journal ArticleDOI
Theory of ferromagnetic (III, Mn) V semiconductors
TL;DR: In this article, the current status of the field of (III,Mn)V diluted magnetic semiconductors is reviewed, focusing on the first two, more mature research directions: the microscopic origins and fundamental physics of the ferromagnetism that occurs in these systems, and the development of spintronic devices with new functionalities.
Journal ArticleDOI
Surface acoustic wave driven ferromagnetic resonance in nickel thin films: Theory and experiment
Lukas Dreher,Mathias Weiler,Matthias Pernpeintner,Hans Huebl,Rudolf Gross,Martin S. Brandt,Sebastian T. B. Goennenwein +6 more
TL;DR: In this paper, the authors present an extensive experimental and theoretical study of surface acoustic wave driven ferromagnetic resonance and derive expressions for the magnetization dynamics upon magnetoelastic driving that are used to calculate the absorbed microwave power upon magnetic resonance as well as the spin-current density generated by the precessing magnetization in the vicinity of a ferromagnet/normal metal interface.
Journal ArticleDOI
Ferromagnetic resonance in Ga1−xMnxAs dilute magnetic semiconductors
Xinyu Liu,Jacek K. Furdyna +1 more
TL;DR: In this paper, the effect of annealing, temperature, and doping on magnetic anisotropy has been investigated in Ga1?xMnxAs Ga1.xAs/Ga1?yAlyAs heterostructures.
Journal ArticleDOI
Uniaxial in-plane magnetic anisotropy of Ga1−xMnxAs
Ulrich Welp,Vitalii Vlasko-Vlasov,A. Menzel,Hoydoo You,Xiaofeng Liu,Jacek K. Furdyna,Tomasz Wojtowicz +6 more
TL;DR: The uniaxial anisotropic magnetic properties of a series of epitaxial Ga1−xMnxAs films with thicknesses ranging from 0.2 to 6.8μm were investigated using magnetometry and x-ray diffraction as discussed by the authors.
References
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Book
Introduction to solid state physics
TL;DR: In this paper, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.
Journal ArticleDOI
Electrical spin injection in a ferromagnetic semiconductor heterostructure
TL;DR: In this paper, the authors reported the fabrication of all-semiconductor, light-emitting spintronic devices using III-V heterostructures based on gallium arsenide.
Journal ArticleDOI
Injection and detection of a spin-polarized current in a light-emitting diode
TL;DR: In this article, the magnetic semiconductor BexMnyZn1-x-ySe is used as a spin aligner to inject spin-polarized charge into a non-magnetic semiconductor device.
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Hole-mediated ferromagnetism in tetrahedrally coordinated semiconductors
TL;DR: In this paper, a mean field model of ferromagnetic semiconductors mediated by delocalized or weakly localized holes in zinc-blende and wurzite diluted magnetic semiconductor was presented.