Ferromagnetism of Mn-doped GaN polycrystalline powders

Li, H.; Bao, H.Q.; Wang, G.; Wang, W.J.; Chen, X.L.

doi:10.1016/j.jmmm.2008.09.016

Cited by 31 publications

(3 citation statements)

References 26 publications

(34 reference statements)

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“…There have been many reports on roomtemperature ferromagnetism for wide bandgap semiconductor doped with a few percent of 3d transition-metal ions. The host materials for the DMS have been ZnO [1,[4][5][6], ZnS [2,[7][8][9][10][11][12], TiO 2 [13,14], SnO 2 [15,16], GaAs [17], AlN [18], and GaN [19]. TM-doped DMS materials always suffer from problems such as formation of secondary phase and/or clusters [2].…”

Section: Introductionmentioning

confidence: 99%

Antiferromagnetic coupling in Co-doped ZnS

2015

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In this paper, we report room-temperature ferromagnetism in chemically synthesized Zn 1-x Co x S (0 B x B 0.10) diluted magnetic semiconductor nanoparticles of *3-5 nm. The incorporation of Co 2? ion for Zn 2? ions in ZnS lattice and the particle size were confirmed by XRD and TEM along with selected area electron diffraction analysis. UV-Vis measurement showed reduction in the bandgap energy with the increase in Co doping. Maximum magnetization was observed for samples with x = 0.04. From photoluminescence, spectra luminescence efficiency was found to get enhanced on Co doping. Magnetization behavior can be understood to be due to defect-induced ferromagnetism; however, for higher doping concentration, the antiferromagnetic coupling of CoCo interaction in the close proximity results in the decrease of the overall magnetization of the samples. Moreover, magneto-electronic study also showed a maximum negative magneto-resistance of *43 % for x = 0.04.

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Section: Introductionmentioning

confidence: 99%

Antiferromagnetic coupling in Co-doped ZnS

2015

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“…As reported by Li et al, 16,17 very low doping contents of Mn in Mn-doped GaN and AlN could not produce intrinsic FM without the aid of defects. Similarly, the defects in the sample are also believed to play a significant role for the FM.…”

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confidence: 68%

Local structure and magnetic properties of Mn-doped 3C-SiC nanoparticles

Zheng

Wang

Liu

et al. 2011

Applied Physics Letters

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“…However, non-magnetic doped or undoped DMSs usually exhibit weak FM features that limit their practical applications and thus, much effort is still required to obtain high-quality TM-doped DMSs with a high T c [2,17,18]. Towards this aim, many research groups have tried to solve these challenges for TM-doped DMSs, including bulk or film materials [19][20][21]. Unfortunately, a solution for these challenges is still lacking, in particular for SiC-based DMSs.…”

Section: Introductionmentioning

confidence: 99%

Structural and magnetic properties of (Al, Fe)-codoped SiC

Song¹,

Chen²,

Han³

et al. 2010

J. Phys. D: Appl. Phys.

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In this study, as a first attempt, we choose Al and transition metals (TMs), Fe, as codoping atoms to synthesize (Al, TM)-codoped SiC. X-ray diffraction and Raman analysis showed that a series of single-phase codoped 4H-SiC samples were obtained and no trace of any other impurity phases, such as Fe3Si and polytypes of other types of SiC, was found. Measurement of magnetic properties showed that codoping by Al and Fe elements changed the original glassy ferromagnetism (FM) features in Al-doped SiC and induced a robust room temperature FM order that gradually dominated (Al, Fe)-codoped 4H-SiC with increase in Fe content. The contribution of Al elements to the magnetic properties of (Al, Fe)-codoped 4H-SiC can be neglected and the magnetic origin should be ascribed to be induced by Fe doping. The only major role of Al is to stabilize the codoped crystal structure as 4H- single phase. As the first investigation on (Al, TM)-codoped SiC, this study opens a new pathway to obtain TM-doped SiC-based diluted magnetic semiconductors with a high T c via the codoping strategy.

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Ferromagnetism of Mn-doped GaN polycrystalline powders

Cited by 31 publications

References 26 publications

Antiferromagnetic coupling in Co-doped ZnS

Antiferromagnetic coupling in Co-doped ZnS

Local structure and magnetic properties of Mn-doped 3C-SiC nanoparticles

Structural and magnetic properties of (Al, Fe)-codoped SiC

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