New diluted magnetic semiconductor (BaK)(ZnMn)2As2: Electronic structure and magnetic properties

2015 ◽  
Vol 98 ◽  
pp. 93-98 ◽  
Author(s):  
H.L. Tao ◽  
L. Lin ◽  
Z.H. Zhang ◽  
M. He ◽  
B. Song
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Diluted Magnetic

Electronic structure and magnetic properties of diluted magnetic semiconductor K and Mn co-doped BaCd2As2 from first-principles calculations

2014 ◽  
Vol 28 (14) ◽  
pp. 1450111 ◽  
Author(s):  
L. Hua ◽  
Q. L. Zhu
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Density Functional ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Antiferromagnetic Coupling ◽  
Generalized Gradient ◽  
Diluted Magnetic ◽  
Mn Doped ◽  
Co Doped

In this paper, we have investigated the electronic structure and magnetic properties of K and Mn co-doped BaCd 2 As 2 using density functional theory within the generalized gradient approximation ( GGA ) + U schemes. Calculations show that the ground state magnetic structure of Mn -doped BaCd 2 As 2 is antiferromagnetic while K and Mn co-doped BaCd 2 As 2 is ferromagnetic. Electronic structures indicate that the superexchange mechanism leads to the antiferromagnetic coupling between Mn atoms in Mn -doped BaCd 2 As 2 while the hole-mediated Zener's p–d exchange mechanism leads to the ferromagnetic coupling between Mn atoms in K and Mn co-doped BaCd 2 As 2.

An Electronic Structure Study of Mn Doped ZnO Diluted Magnetic Semiconductor Using X-Ray Absorption and Photoemission Techniques

2009 ◽  
Vol 155 ◽  
pp. 163-172
Author(s):  
R.K. Singhal ◽  
M.S. Dhawan ◽  
S.K. Gaur ◽  
Elisa Saitovitch
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Diluted Magnetic Semiconductor ◽  
Room Temperature Ferromagnetism ◽  
Magnetic Semiconductor ◽  
Transition Metal Ions ◽  
X Ray ◽  
Two Samples ◽  
Diluted Magnetic ◽  
X Ray Absorption

ZnO semiconductor doped with a few per cent of some transition metal ions can exhibit above room temperature ferromagnetism, transforming it into a very promising candidate for future spin-electronic applications. In the present article we have compared the electronic structure of two polycrystalline ZnMnO pellets doped with diluted Mn concentration (2% and 4%), carefully characterized by SQUID and XRD, including Rietveld refinement. The characterization measurements established that the samples have the ZnO lattice with ZnS type Wurtzite hexagonal symmetry and no detectable impurities. The samples exhibit distinctly different magnetic properties. The 2% sample displayed a clear FM ordering at 300 K while the 4% sample did not show any ordering down to 5K. The electronic structure of these two samples has been investigated using Mn L23 x-ray absorption spectroscopy, Zn 2p and 3p, Mn 3p and O 1s x-ray photoemission spectroscopy. Our aim was to find out how the changes in the electronic structure can correlate to the observed magnetic properties in such diluted magnetic semiconductor materials. The results show that most of the Mn ions of the ferromagnetic sample are in the divalent state. For the higher Mn percent nonmagnetic sample, a larger contribution of higher oxidation Mn states are dominant and the oxygen content also increases. The two factors can be correlated to the suppressed ferromagnetism, though it is hard to pinpoint that which of these two weighs more in the suppression mechanism.

Electronic and magnetic properties of the diluted magnetic semiconductor Hg1-xMnxTe1-ySey

1995 ◽  
Vol 10 (4) ◽  
pp. 463-468 ◽  
Author(s):  
V A Kulbachinskii ◽  
P D Maryanchuk ◽  
I A Churilov ◽  
M Inoue ◽  
M Sasaki ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Electronic And Magnetic Properties ◽  
Diluted Magnetic

Carrier-Concentration-Dependent Magnetic Properties of the Diluted Magnetic Semiconductor SnMnte

1989 ◽  
Vol 151 ◽  
Author(s):  
H. J. M. Swagten ◽  
S. J. E. A. Eltink ◽  
W. J. M. De Jonge
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Experimental Evidence ◽  
Carrier Concentration ◽  
Diluted Magnetic Semiconductor ◽  
Critical Concentration ◽  
Magnetic Semiconductor ◽  
Magnetic Phases ◽  
Diluted Magnetic ◽  
Ferromagnetic Interactions

ABSTRACTIn this paper experimental evidence is presented for the carrier concentration dependence of the magnetic properties of Sn0.97Mn0.03Te, yielding a critical concentration above which ferromagnetic interactions are dominant. The observed behavior can be fairly well explained within a modified RKKY-model. Preliminary experiments on the low temperature magnetic phases indicate re-entrant spinglass behavior, which is qualitatively described with the spinglass model of Sherrington and Kirkpatrick.

Effect of H Doping on The Structural and Magnetic Properties in ZnCoO Diluted Magnetic Semiconductor Thin Films

2012 ◽  
Vol 33 (4) ◽  
pp. 417-421
Author(s):  
叶展通 YE Zhan-tong ◽  
朱德亮 ZHU De-liang ◽  
马晓翠 MA Xiao-cui ◽  
吕有明 LV You-ming ◽  
柳文军 LIU Wen-jun ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Semiconductor Thin Films ◽  
Structural And Magnetic Properties ◽  
Diluted Magnetic

Influence of Cr concentration on the structural and magnetic properties of the diluted magnetic semiconductor Hg1−xCrxSe

2002 ◽  
Vol 28 (12) ◽  
pp. 880-882 ◽  
Author(s):  
V. D. Prozorovskiı̆ ◽  
I. Yu. Reshidova ◽  
A. I. Puzynya ◽  
S. Yu. Paranchych ◽  
V. R. Romanyuk
Keyword(s):  
Magnetic Properties ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Structural And Magnetic Properties ◽  
Diluted Magnetic ◽  
Cr Concentration

Structural Characterization, and Magnetic Morphological Study of Ni+2 Doped ZnO Synthesized by Combustion Reaction Application for DMS

2012 ◽  
Vol 727-728 ◽  
pp. 511-515 ◽  
Author(s):  
R. Torquato ◽  
E. Shirsath Sagar ◽  
Ruth Herta Goldsmith Aliaga Kiminami ◽  
Ana Cristina Figueiredo de Melo Costa
Keyword(s):  
Magnetic Properties ◽  
Magnetic Measurements ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Transition Metal Ions ◽  
Combustion Reaction ◽  
Second Phase ◽  
Doped Zno ◽  
Diluted Magnetic ◽  
Maximum Temperatures

ZnO is a semiconductor that can be doped with transition metal ions, and thus becomes feasible to use in the diluted magnetic semiconductor (DMS), or semiconductor with magnetic properties. In this work we have studied the influence of doping of Ni+2on the structural, morphological and magnetic properties of Zn1-xNixO system, to x = 0.07, 0.1 and 0.2 mol of Ni+2synthesized by combustion reaction. The systems were characterized by XRD, SEM and VSM. The maximum temperatures ranged from 639 K and 683 K. All systems showed a majority phase formation of ZnO, with the presence of the second phase NiO. The crystallite size for the majority phase varied between 49 and 56nm. All systems have resulted in samples with a morphology consisting of dense clusters, formed by particles pre-sintered and shaped roughly hexagonal plates. The magnetic measurements showed that the values of saturation magnetization lies between 4.6 to 28.5emu/g, remanent magnetization of 0.01 to 0.3 emu/g, coercive force values varies between 12.7 and 62.4 Oe and Curie temperature ranging from 308 to 311K.

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