Sub-picosecond time-resolved carrier, phonon, and spin dynamics in Cd(Mn)Te diluted magnetic semiconductors

2005 ◽  
Author(s):  
D. Wang ◽  
Roman Sobolewski ◽  
A. Mycielski
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Spin Dynamics ◽  
Time Resolved ◽  
Diluted Magnetic

CARRIER-DENSITY DEPENDENCE OF THE EXCHANGE COUPLING BETWEEN MAGNETIC IONS AND CONDUCTION BAND ELECTRONS IN HEAVILY n-TYPE Zn(1-x)MnxSe AND OPTICALLY PUMPED Cd(1-x)MnxTe

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1632-1637 ◽  
Author(s):  
M. LENTZE ◽  
P. GRABS ◽  
J. GEURTS ◽  
K. RÖNNBURG ◽  
E. MOHLER ◽  
...  
Keyword(s):  
Conduction Band ◽  
Exchange Coupling ◽  
Carrier Density ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Optically Pumped ◽  
Time Resolved ◽  
Electronic Spin ◽  
Ferromagnetic Character ◽  
Diluted Magnetic

We report on the analysis of the influence of carrier concentration on the exchange coupling between conduction band electrons and Mn d-electrons in diluted magnetic semiconductors. For this analysis we employed (i) electronic spin-flip Raman spectroscopy on heavily n-doped ( Zn , Mn ) Se , (ii) time-resolved Faraday rotation on optically pumped ( Cd , Mn ) Te . With increasing carrier density, a reduction of the exchange energy N0α up to 30 % is observed. It is explained by a weakening of the ferromagnetic character of the coupling of conducton-band electrons to the Mn d-electrons by an admixture of an antiferromagnetic (p-d) coupling contribution to the ferromagnetic (s-d) one for q ≠ 0.

scholarly journals Dynamics of diluted magnetic semiconductors from atomistic spin-dynamics simulations: Mn-doped GaAs

2008 ◽  
Vol 78 (14) ◽  
Author(s):  
J. Hellsvik ◽  
B. Skubic ◽  
L. Nordström ◽  
B. Sanyal ◽  
O. Eriksson ◽  
...  
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Spin Dynamics ◽  
Diluted Magnetic ◽  
Dynamics Simulations ◽  
Mn Doped

scholarly journals Ultra-Fast Spin Dynamics in Diluted Magnetic Semiconductors

1996 ◽  
Vol 90 (5) ◽  
pp. 969-972
Author(s):  
Z. Wilamowski ◽  
R. Buczko ◽  
G. Karczewski ◽  
W. Jantsch
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Spin Dynamics ◽  
Diluted Magnetic ◽  
Fast Spin
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