Magnetic, transport, X-ray diffraction and Mössbauer measurements on CuFeSe2

Lamazares, J.; González-Jiménez, F.; Jaimes, E.; D’Onofrio, L.; Iraldi, R.; Sanchez-Porras, G.; Quintero, M.; González, J.; Woolley, J. C.; Lamarche, G.

doi:10.1016/0304-8853(92)90459-2

Cited by 19 publications

(22 citation statements)

References 5 publications

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“…A sharp increase in the magnetic coercivity from 39 Oe at 300 K to 1780 Oe at 4 K was observed, which the authors suggested may be due to the reduced thermal fluctuation of magnetic dipoles. Previous reports have observed paramagnetic behavior from 300 K to ∼71 K in CuFeSe 2 , with weak ferromagnetic behavior observed below this temperature . A magnetic transition at 80 K in CuFeSe 2 was observed in a separate report, in which the Fe atoms on the 2e and 2a sites (of the tetragonal cell) have slightly different magnetic moments, thus resulting in a weak ferromagnetic behavior …”

Section: Functional Propertiesmentioning

confidence: 76%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

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This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility. The outstanding functional properties of these materials stems from the relationship between their band structure and defect concentration, including charge carrier concentration and electronic conductivity character, which consequently affects their optoelectronic, optical, and plasmonic properties. This, combined with several metastable crystal phases and stoichiometries and the low energy of formation of defects, makes the reproducible synthesis of these materials, with tunable parameters, remarkable. Further to this, the review captures the progress of the hierarchical assembly of these NCs, which bridges the link between their discrete and collective properties. Their ubiquitous application set has cross-cut energy conversion (photovoltaics, photocatalysis, thermoelectrics), energy storage (lithium-ion batteries, hydrogen generation), emissive materials (plasmonics, LEDs, biolabelling), sensors (electrochemical, biochemical), biomedical devices (magnetic resonance imaging, X-ray computer tomography), and medical therapies (photochemothermal therapies, immunotherapy, radiotherapy, and drug delivery). The confluence of advances in the synthesis, assembly, and application of these NCs in the past decade has the potential to significantly impact society, both economically and environmentally.

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Section: Functional Propertiesmentioning

confidence: 76%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

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“…1). The conductivity of specimens , which was calculated from the data of resistivity changes in the interval ~ 125-71.4 [4], that is significantly lower then in usual metals.…”

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confidence: 99%

Ferron-type conductivity in metallic CuFeSe2

Polubotko

2011

Phys. Metals Metallogr.

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It is pointed out, that in the compound 2CuFeSe the charge transfer in the paramagnetic region is carried out by ferrons of a small radius predicted by N. Mott.For very low temperatures the charge transfer may be carried out by ferrons of a large radius. The results are well confirmed by the temperature dependence of resistivity and by metallic type of conductivity of 2CuFeSe and are also well coordinated with the character of charge transfer in magnetic materials.

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“…We would like to point out that the presence of the minor CuFe 2 Se 2 impurity does not affect the magnetism of samples A and B. The AFM transition that takes place in CuFeSe 2 at 70 K is not observed in the measured ZFC and FC magnetization curves, thus indicating a negligible contribution from this impurity to the overall response from the main ferrimagnetic phase.…”

Section: Resultsmentioning

confidence: 89%

Increasing Magnetic Hardness of Fe₃Se₄ via Cu Doping

et al. 2021

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The influence of Cu doping on the structural and magnetic properties of the Fe3Se4 ferrimagnet has been investigated by a combination of X-ray diffraction, Raman spectroscopy, X-ray absorption spectroscopy, and magnetic measurements. While the effects of dopants with ionic radii closer to those of the Fe sites in Fe3Se4 had been studied before, Cu is a less conventional dopant, due to its smaller size (at the same ionic charge) and preference for lower coordination numbers. A (Fe1–x Cu x )3Se4 series, where x = 0–0.15, has been prepared by either high-temperature annealing or the solvothermal method. Although only a limited amount of Cu enters the Fe3Se4 structure, the Cu doping causes a substantial increase in the coercivity of the material. Furthermore, the samples prepared by the solvothermal method exhibit much larger coercive fields as compared to those observed for the samples prepared by high-temperature annealing. The effect was traced to the higher lattice strain accumulated in the samples synthesized solvothermally, as evidenced by the broadening of their Raman peaks.

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Magnetic, transport, X-ray diffraction and Mössbauer measurements on CuFeSe2

Cited by 19 publications

References 5 publications

Compound Copper Chalcogenide Nanocrystals

Compound Copper Chalcogenide Nanocrystals

Ferron-type conductivity in metallic CuFeSe2

Increasing Magnetic Hardness of Fe₃Se₄ via Cu Doping

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Magnetic, transport, X-ray diffraction and Mössbauer measurements on CuFeSe2

Cited by 19 publications

References 5 publications

Compound Copper Chalcogenide Nanocrystals

Compound Copper Chalcogenide Nanocrystals

Ferron-type conductivity in metallic CuFeSe2

Increasing Magnetic Hardness of Fe3Se4 via Cu Doping

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Product

Resources

About

Increasing Magnetic Hardness of Fe₃Se₄ via Cu Doping