A new compact electron spin polarimeter with a high efficiency

Abstract

Articles you may be interested inRotatable spin-polarized electron source for inverse-photoemission experiments Rev. Sci. Instrum. 85, 013306 (2014); 10.1063/1.4863097 Anomalous Rashba effect of bismuth(111) thin films studied by high-resolution spin-and angle-resolved photoemission spectroscopy Absolute spin calibration of an electron spin polarimeter by spin-resolved photoemission from the Au(111) surface states Rev. Sci. Instrum. 80, 043904 (2009); 10.1063/1.3115213Electronic structure and magnetic anisotropy of Co/Au(111): a spin-resolved photoelectron spectroscopy study AIP Conf.We have developed a new compact retarding-potential Mott spin polarimeter and achieved an efficiency of 1.9ϫ10 Ϫ4 for gold target operating in 25 keV. A novel design of the retarding field electron optics with 0.59 sr collection solid angle for scattered electrons was adopted based on Monte Carlo calculations for the spin-dependent electron scattering process and electron beam ray-tracing calculations. We have combined the new spin polarimeter with an angle-resolved photoelectron spectrometer and measured the spin-and angle-resolved photoelectron spectra and studied the spin-dependent electronic structure of Ni͑110͒ along the ⌫S line of its surface Brilluoin zone.

Magnetic Dead Layers Induced by Strain at fct Fe/Rh(001) Interface

“…SARPES experiments were carried out at BL-19A of Photon Factory in KEK using a photoelectron spectrometer consisting of a hemispherical electron energy analyzer and a compact Mott spin detector. 16) The linearly polarized synchrotron radiation was incident at 30 off normal to the sample surface and the photoelectrons emitted normal to the surface were analyzed. The energy resolution of the SARPES spectra was 300 meV.…”

Structure and magnetism of Fe thin films grown on Rh(001) studied by photoelectron spectroscopy

“…The SARPES spectra were measured using a He discharge lamp and a SARPES spectrometer consisting of a hemispherical electron energy analyzer and a compact retarding-type Mott detector. 23 The MCD experiments were carried out at beamline 11A using right-and left-circularly polarized synchrotron radiation from a dipole magnet. The x-ray absorption spectra were measured by the photocurrent at the Fe 2p and Rh 3p absorption edges.…”

High-efficiency spin-resolved and spin-integrated electron detection: Parallel mounting on a hemispherical analyzer

“…The performance of the latest optimized versions are now reaching excellent values for S eff ͑ranging from 0.14 to 0.20 depending on the setup and the target material͒ and an encouraging detection efficiency ͑N/N 0 from 5ϫ10 Ϫ3 to 2ϫ10 Ϫ2 ͒. 18,19 In terms of the electronoptical acceptance with a target voltage at 20-25 kV, is always at least 100 times higher than in the conventional diffuse scattering polarimeter. Moreover, the acceleration column can be designed with fewer constraints, due to the position of the detectors with respect to the target.…”