Magnetic and Transport Properties of Ga1-xMnxAs, a New III-V Diluted Magnetic Semiconductor

1997 ◽  
Vol 475 ◽  
Author(s):  
A. Van Esch ◽  
L. Van Bocksta ◽  
J. De Boeck ◽  
G. Verbanck ◽  
A. Van Steenbergen ◽  
...  
Keyword(s):  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Magnetic Ordering ◽  
Strongly Correlated ◽  
Metal Insulator ◽  
Transport Behaviour ◽  
Diluted Magnetic ◽  
Mn Concentration ◽  
Mn Concentrations ◽  
Strong Antiferromagnetic Interaction

ABSTRACTGa1-xMnxAs is a new III-V diluted magnetic semiconductor that can be grown by MBE with Mn concentrations up to x ∼ 0.09. Below a critical temperature Tc, determined by the Mn concentration (about 50 K for x = 0.05) the material becomes ferromagnetic. This is attributed to the magnetic long-range order of Mn-hole complexes, the latter being the result of the strong antiferromagnetic interaction between the holes and Mn 3d spins. Transport and magnetic properties of the Ga1-xMnxAs system are strongly correlated. Above Tc, all samples show transport behaviour characteristic for materials near the metal insulator transition. Below Tc, resistivity decreases as the magnetic ordering sets in. When the magnetisation has reached its saturation value (below ∼ 20 K), variable range hopping is the main transport mechanism. Also, a negative magnetoresistance is observed below Tc.

Diluted Magnetic Semiconductor Magneto-Optic Waveguides for Monolithic-Integration with Semiconductor Optic Devices

1998 ◽  
Vol 517 ◽  
Author(s):  
K. Ando ◽  
W. Zaets ◽  
K. Watanabe
Keyword(s):  
Molecular Beam ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Core Layer ◽  
Gaas Substrates ◽  
Molecular Beam Epitaxy Method ◽  
Clad Layer ◽  
Diluted Magnetic ◽  
Mn Concentration ◽  
Magneto Optic

AbstractWe propose to use a paramagnetic diluted magnetic semiconductor Cd1-xMnxTe for magneto-optic waveguides, which can be integrated with semiconductor optic devices. Single crystal Cd1-xMnxTe films are epitaxially grown on GaAs substrates by molecular beam epitaxy method. A good optical confinement is obtained in the waveguide by using a Cd1-yMnyTe clad layer with Mn concentration higher than that of the waveguide core layer.

scholarly journals A CaAl 2 Si 2 -Type Magnetic Semiconductor (Sr, Na)(Zn, Mn)2Sb2 Isostructural to 122-Type Iron-Based Superconductors

2022 ◽  
Vol 2022 ◽  
pp. 1-7
Author(s):  
Yilun Gu ◽  
Rufei Zhang ◽  
Haojie Zhang ◽  
Licheng Fu ◽  
Guoxiang Zhi ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Diluted Magnetic Semiconductor ◽  
Parent Compound ◽  
Magnetic Semiconductor ◽  
Magnetic Ordering ◽  
Iron Based ◽  
Diluted Magnetic ◽  
Formula Type

A new diluted magnetic semiconductor (Sr, Na)(Zn, Mn)2Sb2 has been successfully synthesized by doping Na and Mn into the parent compound SrZn 2 Sb 2 , which has a CaAl 2 Si 2 -type crystal structure (space group P 3 ¯ m 1 , No. 164, h P 5 ) isostructural to the 122-type iron-based superconductor CaFe 2 As 2 . No magnetic ordering has been observed when only spins are doped by (Zn, Mn) substitution. Only with carriers codoped by (Sr, Na) substitution, a ferromagnetic ordering occurs below the maximum Curie temperature T C ∼9.5 K. Comparing with other CaAl 2 Si 2 -type diluted magnetic semiconductors, we will show that negative chemical pressure suppresses the Curie temperature.

Magnetic studies of PbMnI2 Layered Diluted Magnetic Semiconductor Nanoparticles

2018 ◽  
Vol 10 (5) ◽  
pp. 05005-1-05005-5
Author(s):  
I. D. Stolyarchuk ◽  
◽  
I. Rogalska ◽  
S. V. Koretskii ◽  
I. Stefaniuk ◽  
...  
Keyword(s):  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Semiconductor Nanoparticles ◽  
Magnetic Studies ◽  
Diluted Magnetic

The distinct behavior of specific heat of diluted magnetic semiconductor (Ga,Mn)As quantum wells

2015 ◽  
Vol 15 ◽  
pp. S26-S29 ◽  
Author(s):  
Hee Chang Jeon ◽  
Mingkai Li ◽  
Seung Joo Lee ◽  
Gukhyung Ihm ◽  
Tae Won Kang ◽  
...  
Keyword(s):  
Specific Heat ◽  
Quantum Wells ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Diluted Magnetic
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