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

Zheng, Hai Wu; Wang, Z. Q.; Liu, Guang Sheng; Diao, Chunli; Zhang, H. R.; Gu, Yulan

doi:10.1063/1.3665258

Cited by 33 publications

(4 citation statements)

References 19 publications

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“…% Mn-doped SiC films annealed at 1200 C, which can be resolved into two components at 282.7 and 283.5 eV, corresponding to the C-Si bond and C-C bond, respectively. Recently, Zheng et al 20 determined the accurate location of Mn atoms in the Mn-doped 3C-SiC by extended x-ray absorption fine structure and revealed the Mn atoms substituted for C sites in 3C-SiC lattice. With the doped Mn concentration increasing, the peak strengths of Si-C bond become weaker and those of C-C bond become stronger.…”

Section: Resultsmentioning

confidence: 99%

Investigation of structure, magnetic, and transport properties of Mn-doped SiC films

Sun

Guo

et al. 2013

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Mn-doped SiC films were fabricated by radio frequency magnetron sputtering technique. The structure, composition, and magnetic and transport properties of the films were investigated. The results show the films have the 3C-SiC crystal structure and the doped Mn atoms in the form of Mn 2þ ions substitute for C sites in SiC lattice. All the films are ferromagnetic at 300 K, and the ferromagnetism in films arises from the doped Mn atoms and some extended defects. In addition, the saturation magnetization increases with the Mn-doped concentration increasing. The Mn doping does not change the semiconductor characteristics of the SiC films.

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Section: Resultsmentioning

confidence: 99%

Investigation of structure, magnetic, and transport properties of Mn-doped SiC films

Sun

Guo

et al. 2013

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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“…50,51 Alternatively, nanosized SiC may be synthesized by sol-gel and carbothermal reduction methods together with the desired dopant as was demonstrated for manganese-doped cubic SiC nanoparticles. 52…”

Section: Resultsmentioning

confidence: 99%

Near-infrared luminescent cubic silicon carbide nanocrystals for in vivo biomarker applications: an ab initio study

2012

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Molecule-sized fluorescent emitters are much sought-after to probe biomolecules in living cells. We demonstrate here by time-dependent density functional calculations that the experimentally achievable 1-2 nm sized silicon carbide nanocrystals can emit light in the near-infrared region after introducing appropriate color centers in them. These near-infrared luminescent silicon carbide nanocrystals may act as ideal fluorophores for in vivo bioimaging.

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“…Irregular distribution of In-based nanoclusters has been detected at the GaN/InN and InGaN/AlGaN interfaces with an estimated diameter of ~1-2 nm. To probe the optical, structural, and electrical attributes of compound semiconductors, it has been a customary tradition to instigate a variety of characterization techniques, including reflectivity, absorption [24][25][26][27], high-resolution X-ray diffraction (HR-XRD) [28][29][30][31][32][33][34], extended X-ray absorption fine structures (EXAFs) [35][36][37][38][39][40], photoluminescence (PL) [41][42][43], secondary ion mass spectroscopy [20][21][22][23][24][25][26][27][28] (SIMS), spectroscopic ellipsometry (SE) [28], electron-energy loss (EEL) [43,44] measurements, etc. Other experimental methods such as electron paramagnetic resonance (EPR) and far-infrared (FIR) spectroscopy [21][22][23] are also considered valuable for probing the nature of electronic centers, as well as assessing nanostructured interfacial components by evaluating their vibrational and/or electronic properties .…”

Section: Introductionmentioning

confidence: 99%

Evaluating Phonon Characteristics by Varying the Layer and Interfacial Thickness in Novel Carbon-Based Strained-Layer Superlattices

Talwar,

Becla

2023

Solids

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Systematic results of lattice dynamical calculations are reported as a function of m and n for the novel (SiC)m/(GeC)n superlattices (SLs) by exploiting a modified linear-chain model and a realistic rigid-ion model (RIM). A bond polarizability method is employed to simulate the Raman intensity profiles (RIPs) for both the ideal and graded (SiC)10-Δ/(Si0.5Ge0.5C)Δ/(GeC)10-Δ/(Si0.5Ge0.5C)Δ SLs. We have adopted a virtual-crystal approximation for describing the interfacial layer thickness, Δ (≡0, 1, 2, and 3 monolayers (MLs)) by selecting equal proportions of SiC and GeC layers. Systematic variation of Δ has initiated considerable upward (downward) shifts of GeC-(SiC)-like Raman peaks in the optical phonon frequency regions. Our simulated results of RIPs in SiC/GeC SLs are agreed reasonably well with the recent analyses of Raman scattering data on graded short-period GaN/AlN SLs. Maximum changes in the calculated optical phonons (up to ±~47 cm−1) with Δ = 3, are proven effective for causing accidental degeneracies and instigating localization of atomic displacements at the transition regions of the SLs. Strong Δ-dependent enhancement of Raman intensity features in SiC/GeC are considered valuable for validating the interfacial constituents in other technologically important heterostructures. By incorporating RIM, we have also studied the phonon dispersions [ωjSLq→] of (SiC)m/(GeC)n SLs along the growth [001] as well as in-plane [100], [110] directions [i.e., perpendicular to the growth]. In the acoustic mode regions, our results of ωjSLq→ have confirmed the formation of mini-gaps at the zone center and zone edges while providing strong evidences of the anti-crossing and phonon confinements. Besides examining the angular dependence of zone-center optical modes, the results of phonon folding, confinement, and anisotropic behavior in (SiC)m/(GeC)n are compared and contrasted very well with the recent first-principles calculations of (GaN)m/(AlN)n strained layer SLs.

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

Abstract: Magnetic and electronic structure properties of Co-doped SnO2 nanoparticles synthesized by the sol-gelhydrothermal technique

Cited by 33 publications

References 19 publications

Investigation of structure, magnetic, and transport properties of Mn-doped SiC films

Investigation of structure, magnetic, and transport properties of Mn-doped SiC films

Near-infrared luminescent cubic silicon carbide nanocrystals for in vivo biomarker applications: an ab initio study

Evaluating Phonon Characteristics by Varying the Layer and Interfacial Thickness in Novel Carbon-Based Strained-Layer Superlattices

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