scholarly journals Hard X-ray magnetochiral dichroism in a paramagnetic molecular 4f complex

2020 ◽  
Vol 11 (31) ◽  
pp. 8306-8311
Author(s):  
Dmitri Mitcov ◽  
Mikhail Platunov ◽  
Christian D. Buch ◽  
Anders Reinholdt ◽  
Anders R. Døssing ◽  
...  
Keyword(s):  
Single Crystals ◽  
Opposite Sign ◽  
X Ray ◽  
First Time ◽  
X Ray Absorption ◽  
Absorption Measurements

Magnetochiral Dichroism of chiral mononuclear lanthanoid complexes is for the first time detected by X-ray absorption measurements on single crystals of Holmium oxydiacetate, at the Ho L3-edge. The effect is of opposite sign for the two enantiomers.

STUDY OF ITINERANT HOLES IN PLANAR AND APICAL OXYGEN IN TWO DIFFERENT BSCCO (2212) SINGLE CRYSTALS USING POLARISED X-RAY ABSORPTION

2004 ◽  
Vol 18 (20n21) ◽  
pp. 2841-2848 ◽  
Author(s):  
B. DALELA ◽  
S. DALELA ◽  
N. L. Saini ◽  
R. K. SINGHAL ◽  
C. T. Chen ◽  
...  
Keyword(s):  
Single Crystals ◽  
Detection Technique ◽  
Hole Density ◽  
Apical Oxygen ◽  
X Ray ◽  
X Ray Absorption ◽  
Absorption Measurements

X-ray absorption measurements have been made on Cu L 3 and O K-edge on BSCCO (2212) single crystals annealed under two different conditions at 1 bar O 2 (under-doped) and another annealed in 1:4 ratio of O 2: Ar (optimally doped) using the F. Y. detection technique. Our results clearly indicate that hole density decreases while going towards c-axis from the ab plane. Our results shows that the doping holes have predominantly x, y symmetry compared to those having pz symmetry. The T c for both the crystals does not depend on the density of doping holes in the apical oxygen. However, the matter needs to be further explored.

scholarly journals Revealing noncollinear magnetic ordering at the atomic scale via XMCD

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Fridtjof Kielgast ◽  
Ivan Baev ◽  
Torben Beeck ◽  
Federico Pressacco ◽  
Michael Martins
Keyword(s):  
Ground State ◽  
Magnetic Circular Dichroism ◽  
Magnetic Moments ◽  
Magnetic Ordering ◽  
Atomic Scale ◽  
Angle Of Incidence ◽  
X Ray ◽  
First Time ◽  
X Ray Absorption ◽  
Magnetic Sublattices

AbstractMass-selected V and Fe monomers, as well as the heterodimer $${\text{Fe}}_1{\text{V}}_1$$ Fe 1 V 1 , were deposited on a Cu(001) surface. Their electronic and magnetic properties were investigated via X-ray absorption (XAS) and X-ray magnetic circular dichroism (XMCD) spectroscopy. Anisotropies in the magnetic moments of the deposited species could be examined by means of angle resolving XMCD, i.e. changing the X-ray angle of incidence. A weak adatom-substrate-coupling was found for both elements and, using group theoretical arguments, the ground state symmetries of the adatoms were determined. For the dimer, a switching from antiparallel to parallel orientation of the respective magnetic moments was observed. We show that this is due to the existence of a noncollinear spin-flop phase in the deposited dimers, which could be observed for the first time in such a small system. Making use of the two magnetic sublattices model, we were able to find the relative orientations for the dimer magnetic moments for different incidence angles.

scholarly journals New Standardization Technique for X-Ray Absorption Measurements

1959 ◽  
Vol 31 (10) ◽  
pp. 1748-1748
Author(s):  
J. O. Hibbits ◽  
S. S. Cooper ◽  
M. R. Menke
Keyword(s):  
X Ray ◽  
X Ray Absorption ◽  
Standardization Technique ◽  
Absorption Measurements

scholarly journals Local and electronic structure around Ga in CdTe: evidence of DX- and A-centers

2012 ◽  
Vol 20 (1) ◽  
pp. 166-171
Author(s):  
Vasil Koteski ◽  
Jelena Belošević-Čavor ◽  
Petro Fochuk ◽  
Heinz-Eberhard Mahnke
Keyword(s):  
Density Functional ◽  
Plane Waves ◽  
Lattice Relaxation ◽  
Defect Structures ◽  
Functional Theory ◽  
Edge Structure ◽  
X Ray ◽  
First Time ◽  
X Ray Absorption ◽  
Good Agreement

The lattice relaxation around Ga in CdTe is investigated by means of extended X-ray absorption spectroscopy (EXAFS) and density functional theory (DFT) calculations using the linear augmented plane waves plus local orbitals (LAPW+lo) method. In addition to the substitutional position, the calculations are performed for DX- and A-centers of Ga in CdTe. The results of the calculations are in good agreement with the experimental data, as obtained from EXAFS and X-ray absorption near-edge structure (XANES). They allow the experimental identification of several defect structures in CdTe. In particular, direct experimental evidence for the existence of DX-centers in CdTe is provided, and for the first time the local bond lengths of this defect are measured directly.

Chemical Analysis Based on X-Ray Absorption Measurements. Solids and Liquids

1947 ◽  
Vol 19 (11) ◽  
pp. 861-865 ◽  
Author(s):  
H. A. Liebhafsky ◽  
H. M. Smith ◽  
H. E. Tanis ◽  
E. H. Winslow
Keyword(s):  
Chemical Analysis ◽  
X Ray ◽  
X Ray Absorption ◽  
Absorption Measurements
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