Resonant and magnetic X-ray diffraction by polarized synchrotron radiation

Abstract

Abstract. The aim of these notes is to introduce the experimental methods and theoretical works in the domain of magnetic and resonant x-rays scattering on single crystals to investigate the electronic and magnetic long range order in strongly correlated electron systems. We highlight the role of the x-rays polarization analysis and control to determine the magnetic structure of materials and, more generally, the electronic long range order parameters responsible for the phase transitions.

Transient grating spectroscopy on a DyCo5 thin film with femtosecond extreme ultraviolet pulses

“…The time-delayed vertically polarized probe pulse at the same wavelength ( nm; matching the Co M -edge) was directed onto the sample at an angle of 13°. In this configuration, the vertically polarized beam is mainly sensitive to the out-of-plane magnetization component, 37 which, in DyCo 5 films at room temperature, corresponds to the magnetization direction. 23 …”

Charge Reorganization at the Adsorbate Covered Electrode Surface Probed through in Situ Resonant X-ray Diffraction Combined with ab Initio Modeling

“…In the vertical geometry the Q -vector is perpendicular to the polarization of the X-ray beam and at low L parallel to the surface normal. In the horizontal geometry the Q -vector is parallel to the polarization of the beam and at low L perpendicular to the surface normal …”

“…In the horizontal geometry the Q-vector is parallel to the polarization of the beam and at low L perpendicular to the surface normal. 43 The intensity of the elastically diffracted X-rays was recorded using a Vortex X-ray detector. This detector has sufficient energy resolution to enable separation of the elastic and the fluorescent X-ray signal from the copper substrate and record both in parallel.…”

Correlated Quantum Phenomena of Spin–Orbit Coupled Perovskite Oxide Heterostructures: Cases of SrRuO3 and SrIrO3 Based Artificial Superlattices

“…[203] A key difference between the easy-plane and easy-axis anisotropy is that the easyplane magnetic moments can be completely removed from the scattering plane, giving rise to the zero intensity of magnetic peak, while the magnetic peak intensity of an easy-axis system is nonzero at any finite azimuthal angle. [228][229][230][231][232] In parallel to the easy-axis model, the authors found that the magnetic peak is always observable in the studied azimuthal range. This result demonstrates that (SrIrO 3 )2/(SrTiO 3 )1 has a dominant easy-axis anisotropy, [203] similar to Sr 3 Ir 2 O 7 .…”