Development of a spin polarized low energy electron diffraction system.

We have designed and constructed a spin polarized low energy electron diffraction system working in the reflected electron pulse counting mode. This system is capable of measuring asymmetries due to spin-orbit and exchange interactions. Photoemission from a strained GaAs/GaAsP super lattice is used as the source of spin polarized electrons. Spin-orbit asymmetry is evaluated for Ir(100) single crystal at various energies. Subsequently, exchange asymmetry has been evaluated on 40 monolayer Fe deposited on Ir(100). This instrument proves to be useful in understanding structure and magnetism at surfaces.

[1]  C. Tusche,et al.  Photoelectron spectroscopy in a wide hν region from 6 eV to 8 keV with full momentum and spin resolution , 2015 .

[2]  G. Schönhense,et al.  Specular reflection of spin-polarized electrons from the W(001) spin-filter crystal in a large range of scattering energies and angles , 2015 .

[3]  M. Donath,et al.  Reflectivity and Sherman Maps of Passivated Fe(001): Working Points for a Display-Type Spin-Polarization Analyzer , 2014 .

[4]  R. Feder,et al.  Spin-polarized electron scattering from pseudomorphic Au on Ir(001) , 2013 .

[5]  S. Nepijko,et al.  Imaging spin filter for electrons based on specular reflection from iridium (001). , 2013, Ultramicroscopy.

[6]  G. Schönhense,et al.  Highly efficient multichannel spin-polarization detection. , 2011, Physical review letters.

[7]  G. Schönhense,et al.  Spin resolved photoelectron microscopy using a two-dimensional spin-polarizing electron mirror , 2011 .

[8]  J. Kirschner,et al.  On the preparation of clean tungsten single crystals , 2010 .

[9]  Y. Takeichi,et al.  High efficiency and high energy-resolution spin-polarized photoemission spectrometer , 2009 .

[10]  Y. Takeichi,et al.  A new spin-polarized photoemission spectrometer with very high efficiency and energy resolution. , 2008, The Review of scientific instruments.

[11]  C. Chiang,et al.  High efficiency electron spin polarization analyzer based on exchange scattering at FeW(001). , 2008, The Review of scientific instruments.

[12]  M. Meier,et al.  Characterisation and application of a SPLEED-based spin polarisation analyser , 2007 .

[13]  L. Hammer,et al.  Pseudomorphic growth of Fe monolayers on Ir(001)-(1×1) : From a fct precursor to a bct film , 2007 .

[14]  Ruan Cun-Jun,et al.  Experimental study on the activation process of GaAs spin-polarized electron source , 2003 .

[15]  V. Guidi.  Polarized electron sources , 2000 .

[16]  H. Batelaan,et al.  Stern-Gerlach Effect for Electron Beams , 1997 .

[17]  K. Aulenbacher,et al.  Photoemission of spinpolarized electrons from strained GaAsP , 1996 .

[18]  Vincenzo Guidi,et al.  Long‐lifetime high‐intensity GaAs photosource , 1994 .

[19]  Hammond,et al.  Absorption and elastic and inelastic reflection of spin-polarized low-energy electrons from Fe(110). , 1992, Physical review. B, Condensed matter.

[20]  Maruyama,et al.  Observation of strain-enhanced electron-spin polarization in photoemission from InGaAs. , 1991, Physical review letters.

[21]  Heinz,et al.  Dynamics of the reconstruction process Ir(100) 1 x 1-->1 x 5. , 1985, Physical review. B, Condensed matter.

[22]  R. Feder,et al.  Relativistic scattering calculations: On the study of surface magnetism by polarized and unpolarized electrons , 1984 .

[23]  R. Feder,et al.  Exchange scattering of spin-polarized electrons from ferromagnetic Fe(110)-surfaces , 1983 .

[24]  D. Makowiecki,et al.  Preparation of atomically clean surfaces of selected elements: A review , 1982 .

[25]  R. Celotta,et al.  The GaAs spin polarized electron source , 1980 .

[26]  R. Feder.  Theory of spin-polarized low-energy electron diffraction from ferromagnetics , 1979 .

[27]  D. Pierce,et al.  Photoemission of spin-polarized electrons from GaAs , 1976 .