Polarization and resonance studies of x-ray magnetic scattering in holmium

Charge-magnetic interference resonant scattering studies of ferromagnetic crystals and thin films

“…where f 0 , f c , f m are non-resonant (Thomson), resonant charge, and resonant magnetic scattering amplitudes, respectively, with the last two being complex quantities responsible for anomalous dispersion [1][2][3]. Polarization-dependent terms contain incoming and outgoing polarization vectors (ˆ ,ˆ ), complex for circular polarization, andm, the local magnetic moment direction.…”

“…Polarization-dependent terms contain incoming and outgoing polarization vectors (ˆ ,ˆ ), complex for circular polarization, andm, the local magnetic moment direction. Note that we neglect here weaker nonresonant magnetic scattering and resonant magnetic scattering that is quadratic in the moment direction [1][2][3]6]. In a lattice of magnetic ions, the scattered intensity is given by the modulus square of the structure factor, |F (Q, E)| 2 = | n f n e iQ·rn | 2 where the sum is over all scattering atoms in the unit cell, with f n given in Eq.…”

“…(1) one may be able to separate charge and resonant magnetic scattering by analyzing the polarization of the outgoing (scattered) X-ray beam [8]. Consider a vertical scattering plane and a horizontally polarized incident X-ray beam, as delivered by a linear undulator or bending magnet at a synchrotron source, and a magnetic moment direction in the scattering plane (Fig.…”

Distinct Magnetic Phase Transition at the Surface of an Antiferromagnet

“…In this work, we utilize both of these developments, together with the enhancement in surface sensitivity arising from grazing incidence. Furthermore, we exploit the large resonant enhancement in the magnetic scattering cross section at the uranium M IV absorption edge [11] to study the magnetism at the surface of antiferromagnetic UO 2 .…”

Resonant magnetic scattering with soft x-ray pulses from a free-electron laser operating at 1.59 nm

“…[1][2][3] At the same time nanometer spatial resolution and element-specific information is required in order to account for the complex composition of technologically relevant magnetic media and devices. Simultaneous fulfillment of these requirements mandates ultrafast magnetic scattering experiments using flashes of resonantly [4][5][6][7][8] tuned soft x rays, in particular, for the technologically relevant transition metals Cr, Mn, Fe, Co, and Ni with 2p electron binding energies between approximately 550 and 900 eV. Such experiments can be anticipated in the near future given the current construction of x-ray free-electron lasers ͑FELs͒ in the USA, Japan, and Germany.…”