Magnetic structure and collective Jahn–Teller distortions in nanostructured particles of CuFe2O4

Nedkov, I.; Vandenberghe, R. E.; Marinova, Ts.; Thailhades, Philippe; Merodiiska, T.; Avramova, I.

doi:10.1016/j.apsusc.2006.05.049

Cited by 114 publications

(53 citation statements)

References 19 publications

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“…The Mössbauer spectrum of nanocrystalline CuFe 2 O 4 (Fig. 2, a) was similar with previous reports for CuFe 2 O 4 nanoparticles [4][5][6][7]11] and fitted with two sextets. These two sextets were attributed to the two different sublattices in which Fe occupied tetrahedral (A) or octahedral (B) sites, respectively.…”

Section: Resultssupporting

confidence: 89%

“…The CuFe 2 O 4 is an inverse spinel structure where 8 Cu 2+ ions occupy octahedral (B) sites and 16 Fe 3+ ions occupy both octahedral (B) and tetrahedral (A) sites. The total magnetic moment of the above system depends on the uncompensated Cu 2+ ions due to the cancellation of anti-parallel spins of the Fe 3+ ions in A and B sites [4][5][6][7]. Samples of CuFe 2 O 4 prepared by the different ways were studied by Mössbauer spectroscopy [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Hyperfine interactions in (CuFe2O4)1 − x (SnO2) x (x = 0, 1, 5, 10 and 20 wt.%) nanocomposites studied by Mössbauer spectroscopy

et al. 2007

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A series of (CuFe 2 O 4 ) 1−x (SnO 2 ) x nanocomposites (x = 0, 1, 5, 10, 20 wt.%) have been prepared by urea-nitrate combustion method. The room temperature Mössbauer spectra of CuFe 2 O 4 and (CuFe 2 O 4 ) 0.99 (SnO 2 ) 0.01 contained two sextets while remaining samples contained at least four sextets with additional doublet indicating the presence of paramagnetic phase. The variations of isomer shift, quadruple splitting and magnetic hyperfine field values were found with the addition of SnO 2 .

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Hyperfine interactions in (CuFe2O4)1 − x (SnO2) x (x = 0, 1, 5, 10 and 20 wt.%) nanocomposites studied by Mössbauer spectroscopy

et al. 2007

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“…The binding energy is in good agreement with the literature reports for Cu + in CFO [12,14,16]. There are also broad and weak satellite peaks located at 940.8, 943.7 and 947.2 eV, indicating the presence of small amounts of Cu 2+ state [17,18]. The Cu 2+ /Cu + ratio is calculated to be 8.8%.…”

Section: Resultssupporting

confidence: 89%

Room temperature deposition of amorphous p-type CuFeO2 and fabrication of CuFeO2/n-Si heterojunction by RF sputtering method

et al. 2016

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Transparent conducting amorphous p-type CuFeO 2 (CFO) thin film was prepared by radio-frequency (RF) magnetron sputtering method at room temperature using polycrystalline CuFeO 2 target. Amorphous structure of as-deposited film was confirmed by XRD. XPS analysis convinced that the chemical state of Cu + and Fe 3+ in the film, and the chemical composition of the thin films is close to the stoichiometry of CuFeO 2 . Surface morphology of the film was analysed by SEM studies. p-type nature and concentration of carriers was investigated by Hall effect measurement. The p-n heterojunction in the structure of Al/n-Si/p-CuFeO 2 /Al showed good rectifying behaviour with a forward and reverse currents ratio of 555 at 2 V. The turn-on voltage and reverse leakage current values were found to be 0.9 V and 4 μA at −2 V. Further, the conduction mechanism of forward bias voltage was controlled by thermionic emission (TE) and trap-space charge limited current (TCLC) mechanisms.

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“…Mössbauer spectra of some CuFe 2 O 4 nanoparticles with different size (53, 17, 1300 and 10 nm) and preparation procedure measured with a low and high velocity resolution at room temperature in [41][42][43] are shown in Fig. 9.…”

Section: Nanotechnological Applicationmentioning

confidence: 99%

Mössbauer spectroscopy with a high velocity resolution: Advances in biomedical, pharmaceutical, cosmochemical and nanotechnological research

Оштрах

Semionkin

2013

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

110

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a b s t r a c tThe methodological principles of velocity resolution as additional characteristic of the quality of both Mössbauer spectrometer velocity driving system and Mössbauer spectrum were briefly considered. Significantly better quality of Mössbauer spectra measured with a high velocity resolution in comparison with those measured with a low velocity resolution was demonstrated. The main advances of recent studies of iron containing biomolecules, pharmaceutical products, meteorite samples and nanoparticles using Mössbauer spectroscopy with a high velocity resolution were considered and advantages of this technique were shown.

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Magnetic structure and collective Jahn–Teller distortions in nanostructured particles of CuFe2O4

Cited by 114 publications

References 19 publications

Hyperfine interactions in (CuFe2O4)1 − x (SnO2) x (x = 0, 1, 5, 10 and 20 wt.%) nanocomposites studied by Mössbauer spectroscopy

Hyperfine interactions in (CuFe2O4)1 − x (SnO2) x (x = 0, 1, 5, 10 and 20 wt.%) nanocomposites studied by Mössbauer spectroscopy

Room temperature deposition of amorphous p-type CuFeO2 and fabrication of CuFeO2/n-Si heterojunction by RF sputtering method

Mössbauer spectroscopy with a high velocity resolution: Advances in biomedical, pharmaceutical, cosmochemical and nanotechnological research

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