Electronic structure and x-ray magnetic circular dichroism in uranium compounds. III. Heavy-fermion compounds

2003 ◽  
Vol 68 (21) ◽  
Author(s):  
A. N. Yaresko ◽  
V. N. Antonov ◽  
B. N. Harmon
Keyword(s):  
Electronic Structure ◽  
Circular Dichroism ◽  
Heavy Fermion ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
Uranium Compounds ◽  
Circular Dichroïsm

First principles calculations of intersite disorder influence on the electronic structure and X-ray magnetic circular dichroism in CoFeMnSi Heusler alloy

2020 ◽  
Vol 31 (08) ◽  
pp. 2050109
Author(s):  
S. Uba ◽  
A. Bonda ◽  
L. Uba ◽  
L. V. Bekenov ◽  
V. N. Antonov
Keyword(s):  
Electronic Structure ◽  
Circular Dichroism ◽  
First Principles ◽  
Heusler Alloy ◽  
Magnetic Circular Dichroism ◽  
Magnetic Moments ◽  
X Ray ◽  
The Rich ◽  
X Ray Absorption ◽  
Circular Dichroïsm

Electronic structure, X-ray absorption, and magnetic circular dichroism (XMCD) spectra in the CoFeMnSi Heusler alloy were studied from first principles. Fully relativistic Dirac linear muffin-tin orbital band structure method was implemented with various exchange–correlation functionals tested. The supercell approach was used to study the influence of intersite disorder, at the levels of 6.25%, 12.5%, and 25% within transition metal sites, on the XMCD spectra at [Formula: see text] edges and spin polarization (SP) at the Fermi level. It is found that most sensitive to Fe–Mn and Co–Fe disorder are XMCD spectra at [Formula: see text] edges of Fe, while the sensitivity decreases from Mn to Co. It is shown that magnetic moments estimated with the use of magneto-optical (MO) sum rules agree with the ab initio calculated ones to within [Formula: see text], [Formula: see text], and [Formula: see text], for Co, Fe, and Mn, respectively. The calculated SP decreases from 99% for ordered CoFeMnSi alloy, to 96% upon 25% Co–Fe disorder, to 83% for Fe–Mn disorder, and to 42% in the case of Co–Mn disorder. The calculated spectra agree well with the available experimental data. The rich XMCD spectral structures are predicted from first principles at Fe, Co, Mn and Si [Formula: see text] edges.

scholarly journals Electronic structure and x-ray magnetic circular dichroism in uranium monochalcogenides

2004 ◽  
Vol 30 (4) ◽  
pp. 305-316 ◽  
Author(s):  
V. N. Antonov ◽  
B. N. Harmon ◽  
O. V. Andryushchenko ◽  
L. V. Bekenev ◽  
A. N. Yaresko
Keyword(s):  
Electronic Structure ◽  
Circular Dichroism ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
Circular Dichroïsm

X-ray magnetic circular dichroism study of metamagnetic behaviour in the heavy-fermion system CeRu2Si2

2003 ◽  
Vol 15 (28) ◽  
pp. S2171-S2174 ◽  
Author(s):  
T Honma ◽  
N Kawamura ◽  
M Suzuki ◽  
M Mizumaki ◽  
H Maruyama ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Heavy Fermion ◽  
Magnetic Circular Dichroism ◽  
Fermion System ◽  
Heavy Fermion System ◽  
X Ray ◽  
Circular Dichroïsm
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