Single ferromagnetic behaviour of nanopowders with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si5.gif" overflow="scroll"><mml:msub><mml:mrow><mml:mi>Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:mi mathvariant="normal">C</mml:mi></mml:math>

David, B.; Zbořil, Radek; Mashlan, M.; Grygar, T.; Dumitrache, F.; Schneeweiss, O.

doi:10.1016/j.jmmm.2006.02.224

Cited by 4 publications

(8 citation statements)

References 9 publications

(6 reference statements)

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“…for the as-synthesised mainly superparamagnetic Fe 3 C nanoparticles, is evidently by ∼20 K lower then T C (bulk-Fe 3 C) determined from the σ ↓ (T) measured with decreasing temperature (recrystallised sample). This effect has not been observed in our previous study dealing with a ferromagnetic Fe 3 C-based nanopowder with d XRD (nano-Fe 3 C) = 12 nm [5][6][7]. The decrease of T C is well known as a nanosize effect and was described, for instance, by the authors of the articles [13,14].…”

Section: X-ray Diffractionmentioning

confidence: 55%

“…By the thermomagnetic curve measurement (TM curve) a pellet was held in the evacuated cell (~1 Pa), heated up to 1073 K (hold time 30 minutes) at the rate of 4 K min -1 in the external field H ext = 4 kA m -1 and then cooled down to room temperature. The Curie temperatures T C (bulk-α-Fe) ≈ 1040 K and T C (bulk-Fe 3 C) ≈ 483 K [5,6] can be recognised on the TM curves of both samples (Fig. 2).…”

Section: Methodsmentioning

confidence: 88%

“…It has been demonstrated in our previous reports that this method can provide nanopowders with a dominant Fe 3 C content [5][6][7].…”

Section: Introductionmentioning

confidence: 80%

“…SF 6 was employed as the only laser radiation absorber. Fe(CO) 5 vapors served as an iron source, acetylene as a carbon donor and ammonia as a nitrogen precursor. The main parameters of the two experiments are resumed in Tab.…”

Section: Methodsmentioning

confidence: 99%

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Powders with superparamagnetic Fe₃C particles studied with Mössbauer spectrometry

David

Schneeweiss

Dumitrache

et al. 2010

J. Phys.: Conf. Ser.

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Section: X-ray Diffractionmentioning

confidence: 55%

Section: Methodsmentioning

confidence: 88%

“…It has been demonstrated in our previous reports that this method can provide nanopowders with a dominant Fe 3 C content [5][6][7].…”

Section: Introductionmentioning

confidence: 80%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Powders with superparamagnetic Fe₃C particles studied with Mössbauer spectrometry

David

Schneeweiss

Dumitrache

et al. 2010

J. Phys.: Conf. Ser.

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“…It has been demonstrated in our previous reports that this method can provide nanopowders with dominant Fe 3 C content [2][3][4].…”

Section: Introductionmentioning

confidence: 80%

Low-Temperature Magnetic Properties of Nanocomposites Containing Superparamagnetic Fe₃C Particles

et al. 2010

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Two nanopowders containing superparamagnetic Fe3C particles, superparamagnetic Fe3O4/γ-Fe2O3 particles and carbon black phase were synthesised by the method of laser-induced homogeneous pyrolysis of gaseous precursors. Both were characterised by X-ray diffraction, Mössbauer spectrometry and standard magnetic measurements. The mean crystallite size of Fe3C was 3 nm for the first sample and 10 nm for the second sample. Mössbauer spectra measured at 27 K and zero-field cooled/field cooled curves measured down to 4 K are reported.

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Nanopowders with superparamagnetic Fe₃C particles and their annealing behaviour

David

Schneeweiss

Pizúrová

et al. 2010

Surface & Interface Analysis

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Two samples of nanopowders containing superparamagnetic Fe 3 C and Fe 3 O 4 /γ -Fe 2 O 3 particles and carbon black were synthesized by the method of laser-induced homogeneous pyrolysis of gaseous precursors. Both were characterized by XRD, HR-TEM, Mössbauer spectrometry and standard magnetic measurements. The mean crystallite size of Fe 3 C was 3 nm for the first sample and 10 nm for the second sample. Fe 3 C phase in both samples exhibited reduced Curie temperature and smeared ferromagnetic-paramagnetic transition. After annealing of the samples at 800• C for 30 min the Curie temperature of the recrystallized Fe 3 C phase in both samples was ∼214• C (standard bulk value).

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Single ferromagnetic behaviour of nanopowders with Fe3C

Cited by 4 publications

References 9 publications

Powders with superparamagnetic Fe₃C particles studied with Mössbauer spectrometry

Powders with superparamagnetic Fe₃C particles studied with Mössbauer spectrometry

Low-Temperature Magnetic Properties of Nanocomposites Containing Superparamagnetic Fe₃C Particles

Nanopowders with superparamagnetic Fe₃C particles and their annealing behaviour

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Single ferromagnetic behaviour of nanopowders with Fe3C

Cited by 4 publications

References 9 publications

Powders with superparamagnetic Fe3C particles studied with Mössbauer spectrometry

Powders with superparamagnetic Fe3C particles studied with Mössbauer spectrometry

Low-Temperature Magnetic Properties of Nanocomposites Containing Superparamagnetic Fe3C Particles

Nanopowders with superparamagnetic Fe3C particles and their annealing behaviour

Contact Info

Product

Resources

About

Powders with superparamagnetic Fe₃C particles studied with Mössbauer spectrometry

Powders with superparamagnetic Fe₃C particles studied with Mössbauer spectrometry

Low-Temperature Magnetic Properties of Nanocomposites Containing Superparamagnetic Fe₃C Particles

Nanopowders with superparamagnetic Fe₃C particles and their annealing behaviour