Spin resolved auger electron spectroscopy after photoexcitation with circularly polarized radiation from the BESSY crossed undulator

Probing the magnetic moments of [MnIII6CrIII]3+ single-molecule magnets—A cross comparison of XMCD and spin-resolved electron spectroscopy

“…Experiments performed on paramagnetic Gd in 2001 by Müller et al [51] indicate that spin-resolved electron spectroscopy of samples in the paramagnetic regime above the Curie temperature yields the same information as XMCD data without the need to apply external magnetic fields: The primary excitation step involving circularly polarized radiation is governed by the relativistic dipole selection rules [52,53] for paramagnetic samples as well as for magnetically oriented materials. As a result, the excitation in both cases generates oriented core holes in the sample.…”

“…Detection of the scattered and retarded electrons was performed by channel electron multipliers [63] with a circular entry funnel (diameter 25 mm) to maximize detection efficiency. The electron spectrometer as well as the Mott polarimeter has been used successfully before [33,51,53,64,65] and has been described in more detail elsewhere, see [53,65]. The UHV setup was completed by an electrically isolated sample stage in order to perform total-electron-yield mode XAS measurements, a sample transfer and preparation system providing UHV storage for up to 6 samples and a load-lock with a pumpdown time of less than 1 h, allowing frequent sample changes made necessary by the limited sample lifetime under soft X-ray exposure [32].…”

Spin polarization transfer in the resonant Auger decay following Kr 3d 15p photoexcitation

“…• ) were energy-analysed in a simulated hemispherical electron spectrometer, guided by an electron lens system (Schmidtke et al 2000) and subsequently spin-analysed in a spherical retarding-field Mott polarimeter (Müller et al 1995) which was operated at 45 keV electron scattering energy. The asymmetry of the backscattering signal in two multichannel-plate detectors located below (N d ) and above (N u ) the electron beam is a measure of the spin polarization transfer:…”

Heptanuclear [FeIII6CrIII]3+ Complexes Experimentally Studied by Means of Magnetometry, X-ray Diffraction, XAS, XMCD and Spin-Polarized Electron Spectroscopy in Cross-Comparison with [MnIII6CrIII]3+ Single-Molecule Magnets

“…The sample temperature was maintained constant in a bath cryostat (Wissel (Starnberg, Germany) MBBC-HE0106). 57 Co/Rh was used as the radiation source. Isomer shifts were determined relative to α-iron at room temperature.…”

“…Elemental analyses were carried out on a LECO (St. Joseph, MI, USA) CHN-932 or a HEKAtech Euro (Wegberg, Germany) EA elemental analyzer. 57 Fe Mössbauer spectra were recorded on an alternating constant-acceleration spectrometer. The sample temperature was maintained constant in a bath cryostat (Wissel (Starnberg, Germany) MBBC-HE0106).…”