X-ray magnetic dichroism in III-V diluted magnetic semiconductors: First-principles calculations

2010 ◽  
Vol 81 (7) ◽  
Author(s):  
V. N. Antonov ◽  
A. N. Yaresko ◽  
O. Jepsen
Keyword(s):  
First Principles ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
First Principles Calculations ◽  
X Ray ◽  
Magnetic Dichroism ◽  
Diluted Magnetic

scholarly journals X-Ray Magnetic Dichroism in the Cobalt-Doped Indium Tin Oxide from First Principle Calculations

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
V. N. Antonov ◽  
L. V. Bekenov ◽  
L. P. Germash ◽  
N. A. Plotnikov
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
First Principles ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
Magnetic Dichroism ◽  
Diluted Magnetic ◽  
X Ray Absorption

The electronic structure of the Co-doped indium tin oxide (ITO) diluted magnetic semiconductors (DMSs) were investigated theoretically from first principles, using the fully relativistic Dirac linear muffin-tin orbital band structure method. The X-ray absorption spectra (XAS) and X-ray magnetic circular dichroism (XMCD) spectra at the Co L3, In M2, Sn M2, and O K edges were investigated theoretically from first principles. The origin of the XMCD spectra in these compounds was examined. The calculated results are compared with available experimental data.

Ferromagnetism and Luminescence of Diluted Magnetic Semiconductors GaGdN and AlGdN

2008 ◽  
Vol 1111 ◽  
Author(s):  
Shuichi Emura ◽  
Masahiro Takahashi ◽  
Hiroyuki Tambo ◽  
Akira Suzuki ◽  
Tetsuya Nakamura ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Magnetic Circular Dichroism ◽  
Peak Position ◽  
Magnetic Characteristics ◽  
Sharp Line ◽  
X Ray ◽  
Diluted Magnetic ◽  
X Ray Absorption

AbstractThe magnetic characteristics of the dilute magnetic system GaGdN are investigated by mainly soft-X-ray magnetic circular dichroism (MCD) in energy range of 1160 – 1240 eV. The strong MCD signals up to 30 % at 15K are observed. The temperature dependence of its intensity is not on simple Curie-Weiss curve and depicts three-step curve. A step around 40 – 100K suggests a new magnetic phase. The luminescence spectrum of GaGdN at low temperature is divided into three parts consisting of two broad bands around 432 nm and 503 nm and a sharp peak at 652 nm. This sharp line is assigned to the intra-transition of f – f orbital owing to the weak temperature dependence of the intensity and peak position. AlGdN grown by molecular beam epitaxy produces luminescence at 318.5 nm. X-ray absorption fine structure is examined to survey the occupancy of the Gd ion in the grown specimens.

Localization of the dopant in Ge:Mn diluted magnetic semiconductors by x-ray absorption at the Mn K edge

2010 ◽  
Vol 22 (21) ◽  
pp. 216006 ◽  
Author(s):  
R Gunnella ◽  
L Morresi ◽  
N Pinto ◽  
A Di Cicco ◽  
L Ottaviano ◽  
...  
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
X Ray ◽  
Diluted Magnetic ◽  
X Ray Absorption
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