scholarly journals Exchange interactions in europium monochalcogenide magnetic semiconductors and their dependence on hydrostatic strain

2010 ◽  
Vol 81 (15) ◽  
Author(s):  
W. Söllinger ◽  
W. Heiss ◽  
R. T. Lechner ◽  
K. Rumpf ◽  
P. Granitzer ◽  
...  
Keyword(s):  
Magnetic Semiconductors ◽  
Exchange Interactions ◽  
Hydrostatic Strain

scholarly journals Structural and Magnetic Properties of Mn-Based Diluted Magnetic Semiconductors and Alloys

2009 ◽  
Vol 2009 ◽  
pp. 1-4 ◽  
Author(s):  
A. Alsaad
Keyword(s):  
Rock Salt ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Exchange Interactions ◽  
Magnetic Interactions ◽  
Local Spin Density Approximation ◽  
Energy Minimum ◽  
Rock Salt Structure ◽  
Magnetic Exchange ◽  
Salt Structure

Direct supercell approach calculations of the magnetic exchange interactions in Mn-doped ScN was carried out in the local spin density approximation by using the muffin-tin-orbital Green's function method. We found that magnetic interactions are long range interactions and affected by the randomness, band gap corrections, and carrier concentrations. Using total energy minimization approach we found that the global energy minimum of MnN is obtained for zinc-blende structure. If the compound is compressed by 6%, the energy minimum corresponds to the rock-salt structure in disagreement with the experimentally observed tetragonal distorted rock-salt structure, known as -phase. An isostructural phase transition for alloys from MnN -phase to -ScN phase was found to occur at a hydrostatic pressure of 18 GPa. We predict above room temperature for Mn concentrations of about 10% in ScN : Mn system.

Theory of exchange interactions and chemical trends in diluted magnetic semiconductors

1988 ◽  
Vol 37 (8) ◽  
pp. 4137-4154 ◽  
Author(s):  
B. E. Larson ◽  
K. C. Hass ◽  
H. Ehrenreich ◽  
A. E. Carlsson
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Exchange Interactions ◽  
Diluted Magnetic ◽  
Chemical Trends

Exchange interactions and critical temperatures in diluted magnetic semiconductors

2004 ◽  
Vol 16 (48) ◽  
pp. S5571-S5578 ◽  
Author(s):  
J Kudrnovský ◽  
V Drchal ◽  
I Turek ◽  
L Bergqvist ◽  
O Eriksson ◽  
...  
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Exchange Interactions ◽  
Critical Temperatures ◽  
Diluted Magnetic

MAGNETIC PROPERTIES OF THE DILUTED MAGNETIC SEMICONDUCTORS Zn1−xCoxSe and Zn1−xCoxS

1992 ◽  
Vol 06 (14) ◽  
pp. 2549-2558
Author(s):  
YAOMING MU ◽  
JING-BING ZHU ◽  
PU-LIN LIU ◽  
JIAN-PING PENG ◽  
XUE-CHU SHEN
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Nearest Neighbor ◽  
Magnetic Semiconductors ◽  
Exchange Interactions ◽  
Low Field ◽  
Magnetic Specific Heat ◽  
Heisenberg Type ◽  
Diluted Magnetic ◽  
Spin Orbit Interactions ◽  
Theory And Experiment

The magnetic specific heat, magnetization and low-field magnetic susceptibility of Co-based diluted magnetic semiconductors Zn 1−x Co x Se and Zn 1−x Co x S have been calculated by using a Hamiltonian which takes into account both the Heisenberg-type nearest-neighbor exchange interactions and spin-orbit interactions. A fair agreement between theory and experiment is obtained. No magnetization steps are predicted in the ranges of temperature and magnetic field considered here.

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