Ferromagnetic ordering in half metallic Fe doped CdS diluted magnetic semiconductor: A DFT study

2019 ◽  
Vol 565 ◽  
pp. 25-32 ◽  
Author(s):  
D. Saikia ◽  
Junaid Jami ◽  
J.P. Borah
Keyword(s):  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Dft Study ◽  
Half Metallic ◽  
Diluted Magnetic ◽  
Ferromagnetic Ordering

scholarly journals Drastic improvement of Curie temperature by chemical pressure in N-type diluted magnetic semiconductor Ba(Zn,Co)$$_{2}$$As$$_{2}$$

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Licheng Fu ◽  
Yilun Gu ◽  
Guoxiang Zhi ◽  
Haojie Zhang ◽  
Rufei Zhang ◽  
...  
Keyword(s):  
Unit Cell Volume ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Vital Role ◽  
Ferromagnetic Transition ◽  
Chemical Pressure ◽  
Tetragonal Crystal ◽  
Tetragonal Crystal Structure ◽  
Diluted Magnetic ◽  
Ferromagnetic Ordering

AbstractWe report the effect of chemical pressure on the ferromagnetic ordering of the recently reported n-type diluted magnetic semiconductor Ba(Zn$$_{1-x}$$ 1 - x Co$$_{x}$$ x )$$_{2}$$ 2 As$$_{2}$$ 2 which has a maximum $$T_C$$ T C $$\sim$$ ∼ 45 K. Doping Sb into As-site and Sr into Ba-site induces negative and positive chemical pressure, respectively. While conserving the tetragonal crystal structure and n-type carriers, the unit cell volume shrink by $$\sim$$ ∼ 0.3$$\%$$ % with 15$$\%$$ % Sr doping, but drastically increase the ferromagnetic transition temperature by 18$$\%$$ % to 53 K. Our experiment unequivocally demonstrate that the parameters of Zn(Co)As$$_{4}$$ 4 tetrahedra play a vital role in the formation of ferromagnetic ordering in the Ba(Zn,Co)$$_{2}$$ 2 As$$_{2}$$ 2 DMS.

scholarly journals A new diluted magnetic semiconductor: The half-metallic ferromagnet CoTi1−xFexSb

2008 ◽  
Vol 103 (7) ◽  
pp. 07D115 ◽  
Author(s):  
Benjamin Balke ◽  
Kristian Kroth ◽  
Gerhard H. Fecher ◽  
Claudia Felser
Keyword(s):  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Half Metallic ◽  
Diluted Magnetic ◽  
Metallic Ferromagnet

scholarly journals (Ba,K)(Zn,Mn)2Sb2: A New Type of Diluted Magnetic Semiconductor

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 690
Author(s):  
Shuang Yu ◽  
Guoqiang Zhao ◽  
Yi Peng ◽  
Xiancheng Wang ◽  
Qingqing Liu ◽  
...  
Keyword(s):  
Narrow Band ◽  
Diluted Magnetic Semiconductor ◽  
Parent Phase ◽  
Magnetic Semiconductor ◽  
Theoretical Models ◽  
Degenerate Semiconductor ◽  
New Type ◽  
Diluted Magnetic ◽  
Ferromagnetic Ordering ◽  
Very Low Temperature

A series of polycrystalline samples of a new diluted magnetic semiconductor (DMS) (Ba,K)(Zn,Mn)2Sb2 has been synthesized and systematically studied. The parent phase is the so-called “Zintl compound” BaZn2Sb2, a week-degenerate semiconductor with a narrow band gap of 0.2 eV. In (Ba,K)(Zn,Mn)2Sb2, the charge is doped by (Ba,K) substitution while the spin is independently doped by (Zn,Mn) substitution. (Ba,K)(Zn,Mn)2Sb2 and analogue (Ba,K)(Zn,Mn)2As2 have comparable narrow band gaps, carrier and spin concentrations. However, the former establishes a short-range spin-glass order at a very low temperature (<10 K), while the latter forms a long-range ferromagnetic ordering with a Curie temperature up to 230 K. The sharp contrast makes (Ba,K)(Zn,Mn)2Sb2 to be a touchstone for DMS theoretical models.

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