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Anderson, J. R.; Górska, M.; Azevedo, L. J.; Venturini, E. L.

doi:10.1103/physrevb.33.4706

Cited by 31 publications

(23 citation statements)

References 10 publications

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“…From our obtained results, we have noted that these features are similar to those observed for CdMnTe alloys, where the occupied Mn d states couple with the neighboring unoccupied Mn d ones and, thus, lowering the total energy . Moreover, these remarks are in agreement with the experimental results for the magnetization of these alloys …”

Section: Results and Discusssionssupporting

confidence: 89%

“…[19,21] Moreover, these remarks are in agreement with the experimental results for the magnetization of these alloys. [22,23] From our preliminary results, we can deduce that the HgMnTe alloys in the lower total spin configuration are energetically more favorable. However, calculations with clusters larger than the 8-atom supercell, together with a careful analysis of both the total spin configurations and the Mn-Mn interactions in these alloys, are necessary to have a precise feature of their electronic and magnetic properties.…”

Section: Results and Discusssionsmentioning

confidence: 74%

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Theoretical Study of the Stability and Electronic Properties of HgMnTe Alloys

Carvalho

Silveira

Alves

2019

Physica Status Solidi (b)

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Herein, preliminary theoretical results for the structural and electronic properties of Hg1−xMnxTe alloys in the zincblende structure using density functional theory calculations are presented. The results suggest that there is a strong dependence of the electronic structure of the alloys on the exchange correlation functional used. When using the generalized gradient approximation, the evaluated data show that this material behaves as a semimetal in almost all Mn concentration range, in disagreement with the experimental data. However, with the hybrid Heyd–Scuseria–Ernzerhof functional calculations, results show that the band gap of these alloys opens for the diluted Mn concentration range 0.05 < x < 0.2, consistent with the experimental observations. Moreover, when considering the magnetic ordering of the Mn spins in the alloy, the results show that, in this material, the lower total spin configurations is energetically more favorable.

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Section: Results and Discusssionssupporting

confidence: 89%

Section: Results and Discusssionsmentioning

confidence: 74%

Theoretical Study of the Stability and Electronic Properties of HgMnTe Alloys

Carvalho

Silveira

Alves

2019

Physica Status Solidi (b)

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“…Anderson et al [19] proposed that the low temperature susceptibility follows a power law in temperature as T α where -1 T α 0. α is considered to be a measurement of the random nature of the spin interactions. The smaller the α is, the stronger the interaction will be.…”

Section: Resultsmentioning

confidence: 99%

Magnetic properties of diluted magnetic semiconductor Hg0.89Mn0.11Te

Wang

2015

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The magnetization of Hg 0.89 Mn 0.11 Te single crystal grown by vertical Bridgman method was studied by using superconducting quantum interference device magnetometer (SQUID Magnetometer). First, magnetization measurements were done under various magnetic field strengths from -20 kOe to 20 kOe at 5 K, 15 K, and 77 K, respectively. Then, the magnetizations were measured with continuous changes of temperature in the range from 5 K to 300 K under the magnetic field of 0.1 kOe and 10 kOe, respectively. The modified Brillouin function was well fitted with the data of magnetization vs. magnetic field strength. The analysis indicated that there was an antiferromagnetic exchange coupling among Mn 2+ ions. The results of reciprocal susceptibility vs. temperature fit Curie-Weiss law very well at the temperatures above 40 K, but deviate from the law from 5 K to 40 K, which shows that the antiferromagnetic exchange coupling among Mn 2+ ions increases in the lower temperature range below 40 K. The experimental result was explained by extending higher-order terms in the calculation of susceptibility and fitted by a power law function. The measurements reveal that Hg 0.89 Mn 0.11 Te possesses paramagnetic properties at temperatures from 5 K to 300 K.

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“…The high-temperature expansion is valid as long as T | |, where the Curie-Weiss temperature = x 0 . In a wider temperature range, χ (T ) of random antiferromagnets is well described by 56,57 χ (T ) = aT −α , where a is a temperatureindependent constant and α < 1. Figure 9 presents room temperature dependence of (volume) magnetization M(H ) on the applied field H for selected (Zn,Co)O layers grown at 160…”

Section: Theoretical Modelingmentioning

confidence: 99%

Homogenous and heterogeneous magnetism in (Zn,Co)O

Sawicki

Guziewicz

Łukasiewicz

et al. 2012

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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A series of (Zn,Co)O layers with Co contents x up to 40% grown by atomic layer deposition have been investigated. All structures deposited at 160• C show magnetic properties specific to II-VI dilute magnetic semiconductors with localized spins S = 3/2 coupled by strong but short-range antiferromagnetic interactions resulting in low-temperature spin-glass freezing for x = 0.16 and 0.4. At higher growth temperature (200• C) metallic Co nanocrystals precipitate in two locations giving rise to two different magnetic responses: (i) a superparamagnetic contribution coming from volume disperse nanocrystals; (ii) a ferromagneticlike behavior brought about by nanocrystals residing at the (Zn,Co)O/substrate interface. It is shown that the dipolar coupling within the interfacial two-dimensional dense dispersion of nanocrystals is responsible for the ferromagneticlike behavior.

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Magnetization ofHg1−xMn
J. R. Anderson
¹
,
M. Górska
²
,
L. J. Azevedo
³

et al.

Cited by 31 publications

References 10 publications

Theoretical Study of the Stability and Electronic Properties of HgMnTe Alloys

Theoretical Study of the Stability and Electronic Properties of HgMnTe Alloys

Magnetic properties of diluted magnetic semiconductor Hg0.89Mn0.11Te

Homogenous and heterogeneous magnetism in (Zn,Co)O

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Magnetization ofHg1−xMnJ. R. Anderson1, M. Górska2, L. J. Azevedo3 et al.

Cited by 31 publications

References 10 publications

Theoretical Study of the Stability and Electronic Properties of HgMnTe Alloys

Theoretical Study of the Stability and Electronic Properties of HgMnTe Alloys

Magnetic properties of diluted magnetic semiconductor Hg0.89Mn0.11Te

Homogenous and heterogeneous magnetism in (Zn,Co)O

Contact Info

Product

Resources

About

Magnetization ofHg1−xMn
J. R. Anderson
¹
,
M. Górska
²
,
L. J. Azevedo
³

et al.