Exchange Interactions and Curie Temperatures in Dilute Magnetic Semiconductors

2005 ◽  
Vol 160 (1-4) ◽  
pp. 57-65 ◽  
Author(s):  
K. Sato ◽  
P. H. Dederichs ◽  
H. Katayama-Yoshida
Keyword(s):  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Exchange Interactions ◽  
Curie Temperatures

Theoretical prediction of maximum Curie temperatures of Fe-based dilute magnetic semiconductors by first-principles calculations

2019 ◽  
Vol 12 (6) ◽  
pp. 063006 ◽  
Author(s):  
Tetsuya Fukushima ◽  
Hikari Shinya ◽  
Akira Masago ◽  
Kazunori Sato ◽  
Hiroshi Katayama-Yoshida
Keyword(s):  
Theoretical Prediction ◽  
First Principles ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
First Principles Calculations ◽  
Curie Temperatures

Manganese-Doped CdGeAs2, ZnGeAs2 and ZnSiAs2 Chalcopyrites: A New Advanced Materials for Spintronics

2010 ◽  
Vol 168-169 ◽  
pp. 31-34 ◽  
Author(s):  
A.S. Morozov ◽  
L.A. Koroleva ◽  
D.M. Zashchirinskii ◽  
T.M. Khapaeva ◽  
S.F. Marenkin ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Charge Carriers ◽  
Advanced Materials ◽  
Temperature Dependences ◽  
P Type ◽  
Mn Doped ◽  
Curie Temperatures ◽  
Exchange And Superexchange Interactions

Based on the Mn-doped chalcopyrites CdGeAs2, ZnGeAs2 and ZnSiAs2, new dilute magnetic semiconductors with the p-type conductivity were produced. Magnetization, electrical resistivity and Hall effect of these compositions were studied. Their temperature dependences of magnetization are similar in form in spite of a complicated character, which is controlled by the concentration and mobility of the charge carriers. Thus, for T < 15 K, these curves are characteristic of superparamagnets and for T > 15 K, of a frustrated ferromagnet. In compounds with Zn these two states are diluted by a spinglass-like state. This specific feature is ascribed to attraction of Mn ions occupying neighboring sites and to competition between the carrier-mediated exchange and superexchange interactions. The Curie temperatures of these compounds are above room temperature. These are the highest Curie temperatures in the AIIBIVCV2:Mn systems.

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