Theory of spin polarized photoelectron diffraction
TL;DR: In this paper, the effect of spin-polarized photoelectron diffraction (SPPD) was investigated and it was shown that SPPD is a short-range probe of magnetic order, a result consistent with conclusions reached in several prior studies of SPPD without spin resolution.
About: This article is published in Journal of Magnetism and Magnetic Materials.The article was published on 1991-01-01. It has received 26 citations till now. The article focuses on the topics: Spin polarization & Inelastic scattering.
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TL;DR: In this article, the authors discuss the current and anticipated future research frontiers in magnetism and magnetic materials from a perspective of soft X-ray synchrotron utilization, with an emphasis on challenges that limit the understanding and advancement of these areas.
174 citations
TL;DR: Spin-polarized photoemission has developed into a versatile tool for the study of surface and thin film magnetism as discussed by the authors, and its application to a number of different problems, including both valence band and core level studies.
Abstract: Spin-polarized photoemission has developed into a versatile tool for the study of surface and thin film magnetism. In this review, we examine the methodology of the technique and its application to a number of different problems, including both valence band and core level studies. After a detailed review of spin-polarization measurement techniques and the related experimental requirements we consider in detail studies of the bulk properties both above and below the Curie temperature. This section also includes a discussion of observations relating to unique metastable phases obtained via epitaxial growth. The application of the technique to the study of surfaces, both clean and adsorbate covered, is reviewed. The report then examines, in detail, studies of the spin-polarized electronic structure of thin films and the related interfacial magnetism. Finally, observations of spin-polarized quantum well states in non-magnetic thin films are discussed with particular reference to their mediation of the oscillatory exchange coupling in related magnetic multilayers.
110 citations
TL;DR: In this article, the current status of photoelectron and Auger-electron diffraction is reviewed, with emphasis on new directions of activity, including the use of forward scattering in the study of adsorbed molecules, epitaxial overlayers, and clean surfaces.
106 citations
TL;DR: In this article, a brief overview of the theoretical and numerical aspects on calculating X-ray photoelectron diffraction intensities is given, and the experimental two branches of recording photo electromagnetic diffraction patterns as a function of angle or energy are discussed.
75 citations
TL;DR: In this paper, the current status of photoelectron diffraction studies of surface structures is briefly reviewed, and several recent developments and proposals for future areas of application are then discussed, including the application of full-solid-angle diffraction data, together with simultaneous characterization by low energy electron diffraction and scanning tunnelling microscopy, to epitaxial growth.
68 citations
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1,058 citations
TL;DR: In this article, the differential and integrated cross sections are calculated for the elastic scattering of a slow electron by the hydrogen molecule, and the short-range electrostatic interaction is expanded in terms of the spherical harmonics and only the first two terms are taken into account.
Abstract: The differential and integrated cross sections are calculated for the elastic scattering of a slow electron by the hydrogen molecule. The short-range electrostatic interaction is expanded in terms of the spherical harmonics and only the first two terms are taken into account. The long-range polarization and quadrupole interactions are also included. Most of the calculations contained in this paper are carried out, however, for the spherical potential alone. To a certain approximation, the non-spherical potential has been found to be negligible. The exchange effect is taken into consideration through an approximate attractive potential function, similar to Slater's potential in the theory of atomic structure. Results of calculations agree fairly well with experimental data.
465 citations
TL;DR: In this paper, the design, construction, operation, and performance of a spin polarized electron source utilizing photoemission from negative electron affinity (NEA) GaAs are presented in detail.
Abstract: The design, construction, operation, and performance of a spin polarized electron source utilizing photoemission from negative electron affinity (NEA) GaAs are presented in detail. A polarization of 43±2% is produced using NEA GaAs (100). The polarization can be easily modulated without affecting other characteristics of the electron beam. The electron beam intensity depends on the intensity of the exciting radiation at 1.6 eV; beam currents of 20 μA/mW are obtained. The source is electron optically bright; the emittance phase space (energy‐area‐solid angle product) is 0.043 eV mm2 sr. The light optics, electron optics, and cathode preparation including the GaAs cleaning and activation to NEA are discussed in depth. The origin of the spin polarization in the photoexcitation process is reviewed and new equations describing the depolarization of photoelectrons in the emission process are derived. Quantum yield and polarization measurements for both NEA and positive electron affinity surfaces are reported. T...
392 citations