Local ordering and magnetism in Ga0.9Fe3.1N

Burghaus, Jens; Sougrati, Moulay Tahar; Möchel, A.; Houben, Andreas; Hermann, Raphaël P.; Dronskowski, Richard

doi:10.1016/j.jssc.2011.06.031

Cited by 25 publications

(24 citation statements)

References 22 publications

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“…The incorporation of Ga ions into the γ'-Fe 4 N structure weakens the ferromagnetic coupling between Fe ions, reduces the magnetic moment of the system, and the magnetic properties of γ'-Ga y Fe 4−y N can be modulated between FM (y ≤ 25) and weakly AF (y ≥ 25) [25]. The magnetic response of the GaδFeN layers analyzed here is characterized by two main contributions, namely: (i) a paramagnetic one arising from the Fe ions that substitute for the Ga cations in the matrix, and (ii) a superparamagnetic one generated by the embedded nanocrystals [5,7,23].…”

Section: Crystal Structurementioning

confidence: 99%

Tuning the Size, Shape and Density of γ′-GayFe4−yN Nanocrystals Embedded in GaN

Navarro-Quezada

Devillers

et al. 2019

Crystals

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Phase-separated semiconductor systems hosting magnetic nanocrystal (NCs) are attracting increasing attention, due to their potential as spintronic elements for the next generation of devices. Owing to their morphology- and stoichiometry-dependent magnetic response, self-assembled γ ’-Ga y Fe 4 − y N NCs embedded in a Fe δ -doped GaN matrix, are particularly versatile. It is studied and reported here, how the tuning of relevant growth parameters during the metalorganic vapour phase epitaxy process affects the crystalline arrangement, size, and shape of these self-assembled nanostructures. In particular, it is found that the Ga-flow provided during the δ -doping, determines the amount of Fe incorporated into the layers and the spatial density of the NCs. Moreover, the in-plane dimensions of the NCs can also be controlled via the Ga-flow, conditioning the aspect-ratio of the embedded nanostructures. These findings are pivotal for the design of nanocrystal arrays with on-demand size and shape, essential requirements for the implementation into functional devices.

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Section: Crystal Structurementioning

confidence: 99%

Tuning the Size, Shape and Density of γ′-GayFe4−yN Nanocrystals Embedded in GaN

Navarro-Quezada

Devillers

et al. 2019

Crystals

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“…reach a maximum of M 3 M′N for rather less nitrophilic elements M′ like In, or extend to much higher values M 4-x M′ x N up to x = 4 for more nitrophilic elements. On substitution with group 13 metals, Fe 3.2 In 0.8 N remains ferromagnetically ordered, [22] while Fe 3.1 Ga 0.9 N is paramagnetic with magnetic order below about 8 K. [23] Knowledge on such Ni-and Co-based perovskite nitrides is rather limited. After the recent discovery of type II superconductivity in Ni 3 CuN and Ni 3 ZnN with T c around 3 K, Ni-based perovskites Ni 3 M′N gained substantial consideration.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Bulk Synthesis of Ternary Nitride Perovskites: Co₃InN and Ni₃InN

2019

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Two ternary nitride perovskites Co3InN and Ni3InN have been synthesized electrochemically at 723 K in a molten salt LiCl/KCl:Li3N. The working electrode, which was either a pre‐molten alloy of Co/In or Ni/In, was anodically polarized at 2.6 V during synthesis. Lattice parameters refined by the Rietveld method are a = 385.180(8) pm for Co3InN and a = 385.99(1) pm for Ni3InN. EDX measurements confirm the atomic ratios of 3:1 of the metallic elements. Chemical analyses on nitrogen content result in compositions of Co3InN1.13 and Ni3InN0.95, respectively. Furthermore, particle size of Co3InN is 1–3 µm and of Ni3InN 5–20 µm. Co3InN shows spin‐glass behavior with a freezing temperature of about 11 K at 100 Oe.

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“…25 The magnetisms of Ga 0.9 Fe 3.1 N was analyzed by Mössbauer studies and understood as a kind of "cluster magnetism" where 13-atom Fe clusters are incorporated in a metallic gallium sublattice. 26,27 Spin-glass behavior has only been found in several Mn-, [12][13][14][15][16] Co-, 17 Ni-, 17 and Cr-18 based ternary nitrides. Up to the present day, however, there are no investigations of spin-glass behavior in A x Fe 4−x N. The only known Fe-based spin glass is the carbide with the reported composition SnFe 3 C that exhibits a static glassy transition temperature of 20.3 K. 19 In the present study, a comprehensive magnetic characterization of Sn 0.9 Fe 3.1 N is carried out.…”

Section: Introductionmentioning

confidence: 99%

Spin-glass behavior of Sn0.9Fe3.1N: An experimental and quantum-theoretical study

Scholz

Dronskowski

2016

AIP Advances

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Based on comprehensive experimental and quantum-theoretical investigations, we identify Sn0.9Fe3.1N as a canonical spin glass and the first ternary iron nitride with a frustrated spin ground state. Sn0.9Fe3.1N is the end member of the solid solution SnxFe4−xN (0 < x ≤ 0.9) derived from ferromagnetic γ′-Fe4N. Within the solid solution, the gradual incorporation of tin is accompanied by a drastic weakening of the ferromagnetic interactions. To explore the dilution of the ferromagnetic coupling, the highly tin-substituted Sn0.9Fe3.1N has been magnetically reinvestigated. DC magnetometry reveals diverging susceptibilities for FC and ZFC measurements at low temperatures and an unsaturated hysteretic loop even at high magnetic fields. The temperature dependence of the real component of the AC susceptibility at different frequencies proves the spin-glass transition with the characteristic parameters Tg = 12.83(6) K, τ* = 10−11.8(2) s, zv = 5.6(1) and ΔTm/(Tm ⋅ Δlgω) = 0.015. The time-dependent response of the magnetic spins to the external field has been studied by extracting the distribution function of relaxation times g(τ, T) up to Tg from the complex plane of AC susceptibilities. The weakening of the ferromagnetic coupling by substituting tin into γ′-Fe4N is explained by the Stoner criterion on the basis of electronic structure calculations and a quantum-theoretical bonding analysis.

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Local ordering and magnetism in Ga0.9Fe3.1N

Cited by 25 publications

References 22 publications

Tuning the Size, Shape and Density of γ′-GayFe4−yN Nanocrystals Embedded in GaN

Tuning the Size, Shape and Density of γ′-GayFe4−yN Nanocrystals Embedded in GaN

Electrochemical Bulk Synthesis of Ternary Nitride Perovskites: Co₃InN and Ni₃InN

Spin-glass behavior of Sn0.9Fe3.1N: An experimental and quantum-theoretical study

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Local ordering and magnetism in Ga0.9Fe3.1N

Cited by 25 publications

References 22 publications

Tuning the Size, Shape and Density of γ′-GayFe4−yN Nanocrystals Embedded in GaN

Tuning the Size, Shape and Density of γ′-GayFe4−yN Nanocrystals Embedded in GaN

Electrochemical Bulk Synthesis of Ternary Nitride Perovskites: Co3InN and Ni3InN

Spin-glass behavior of Sn0.9Fe3.1N: An experimental and quantum-theoretical study

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Electrochemical Bulk Synthesis of Ternary Nitride Perovskites: Co₃InN and Ni₃InN