Mössbauer Study of Ferrimagnetic Ordering in Nickel Ferrite and Chromium-Substituted Nickel Ferrite

Chappert, J.; Frankel, Richard B.

doi:10.1103/physrevlett.19.570

Cited by 98 publications

(37 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6 together with results from Chappert and Frankel [2]. It is interesting to note that Chappert and Frankel [2], also using MS in external fields of 7 tesla but at 4.2 K, found ≈33% of iron to reside in the octahedral sites in NiFe 0.3 Cr 1.7 O 4 . Their spectra also show that the net magnetic moments at the octahedral positions are larger than at the tetrahedral sites (a conclusion drawn as the effective field in iron normally is negative) in the whole studied interval.…”

Section: Ms Measurements In Zero External Fieldmentioning

confidence: 84%

“…The cation ordering is presented in Fig. 6 together with results from Chappert and Frankel [2]. It is interesting to note that Chappert and Frankel [2], also using MS in external fields of 7 tesla but at 4.2 K, found ≈33% of iron to reside in the octahedral sites in NiFe 0.3 Cr 1.7 O 4 .…”

Section: Ms Measurements In Zero External Fieldmentioning

confidence: 90%

“…Chappert and Frankel [2], Lee et al [3], Gismelseed and Yousif [4] and Rais et al [5] all declare that the substituting Cr 3+ ions only populate the octahedral site. In the case for x > 1, iron is according to Rais et al [5] only found in the tetrahedral site while Chappert and Frankel [2] and Gismelseed and Yousif [4] also place iron in the octahedral site. Fayek and Ata-Allah [6] and Singhal and Chandra [7] are however of a contrary opinion.…”

mentioning

confidence: 98%

See 2 more Smart Citations

Cation ordering in NiFe_2–xCr_x O₄‐spinels studied by Mössbauer spectroscopy in external fields

Winell

Amcoff²,

Ericsson

2008

Physica Status Solidi (b)

View full text Add to dashboard Cite

NiFe2–x Crx O4, 0 ≤ x ≤ 1.8, produced from appropriate oxides, has been studied using Mössbauer spectroscopy (MS) at low and ambient temperatures and in external fields up to 7 Tesla. X‐ray diffraction (XRD) shows all samples to be single phase cubic spinels, where a0 changes with change in x, as a concave curve, with a minimum at around x = 1. Analyses, based on Mössbauer spectra, show NiFe2–x Crx O4 to be a nearly perfect inverted spinel for x ≤ 0.6. However, for higher x ‐values the ordering is more complicated. It is shown that iron also populates the octahedral positions for x ≥ 0.8. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Section: Ms Measurements In Zero External Fieldmentioning

confidence: 84%

Section: Ms Measurements In Zero External Fieldmentioning

confidence: 90%

mentioning

confidence: 98%

See 1 more Smart Citation

Cation ordering in NiFe_2–xCr_x O₄‐spinels studied by Mössbauer spectroscopy in external fields

Winell

Amcoff²,

Ericsson

2008

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…As can be seen in Figure 2 which depicts the two possible situations, the effective fields at the 57 Fe nucleus are different for each magnetization orientation, and one can expect to resolve the A and B site subspectra [40] [41][42][43] is well-known to have both Fe(II) and Fe(III) in the spinel structure. The nanoparticles produced by our method do not contain any Fe(II) and keep the spinel structure.…”

Section: Magnetization and 57 Fe Mössbauer Measurementsmentioning

confidence: 99%

Nanoparticles of : Synthesis and superparamagnetic properties

1999

View full text Add to dashboard Cite

By using oil in water micelles, cobalt ferrite particles having an average diameter around 3 nm were synthetised. These nanoparticles are characterized by the presence of cation vacancies and no Fe(II) is observed, as it has been described in literature previously. Chemical interfacial treatment allows to coat the particles with citrate derivatives. The magnetic properties of uncoated and coated particles strongly diluted in a polymer substrate are compared by magnetization measurements and 57 Fe Mössbauer spectroscopy. The anisotropy constant is shown to be independent of coating, whereas the magnetization is found to be larger in the uncoated particles.PACS. 75.50.Tt Fine-particle systems -76.80.+y Mössbauer effect; other γ-ray spectroscopy -75.30.Cr Saturation moments and magnetic susceptibilities

show abstract

“…In our view the experimental results could be reconciled with theory if spin canting is allowed. It is well documented that addition of Cr leads to spin canting [9,10]. The presence of spin canting will reduce the large value of m r at high Cr concentration for low temperatures.…”

Section: Resultsmentioning

confidence: 96%

Magnetic and Mössbauer study of Mg0.9Mn0.1Cr x Fe2−x O4 ferrites

et al. 2006

View full text Add to dashboard Cite

The ferrites Mg 0.9 Mn 0.1 Cr x Fe 2−x O 4 (0 x 0:9) were prepared using the conventional double sintering method. The XRD showed that the samples maintain a single spinel cubic phase. The Mössbauer measurements were carried out at room and liquid nitrogen temperatures. From the area ratios of the A and B sites, it was found that the Fe cation population of the A and B sites decreases in proportion to Cr concentration. The contact hyperfine fields at the A and B sites were found to decrease with increasing Cr contents. This was found to be in approximate agreement with the results of magnetization measurement. The distributions of Mg and Mn cations versus Cr concentration were also determined using the Mössbauer and magnetization results. The Curie temperatures were determined and found to agree with the reported values. As the Cr contents increases the relative magnetization, was found to increase at low temperatures and decreases at higher temperatures.

show abstract

Mössbauer Study of Ferrimagnetic Ordering in Nickel Ferrite and Chromium-Substituted Nickel Ferrite

Cited by 98 publications

References 9 publications

Cation ordering in NiFe_2–xCr_x O₄‐spinels studied by Mössbauer spectroscopy in external fields

Cation ordering in NiFe_2–xCr_x O₄‐spinels studied by Mössbauer spectroscopy in external fields

Nanoparticles of : Synthesis and superparamagnetic properties

Magnetic and Mössbauer study of Mg0.9Mn0.1Cr x Fe2−x O4 ferrites

Contact Info

Product

Resources

About

Mössbauer Study of Ferrimagnetic Ordering in Nickel Ferrite and Chromium-Substituted Nickel Ferrite

Cited by 98 publications

References 9 publications

Cation ordering in NiFe2–xCrx O4‐spinels studied by Mössbauer spectroscopy in external fields

Cation ordering in NiFe2–xCrx O4‐spinels studied by Mössbauer spectroscopy in external fields

Nanoparticles of : Synthesis and superparamagnetic properties

Magnetic and Mössbauer study of Mg0.9Mn0.1Cr x Fe2−x O4 ferrites

Contact Info

Product

Resources

About

Cation ordering in NiFe_2–xCr_x O₄‐spinels studied by Mössbauer spectroscopy in external fields

Cation ordering in NiFe_2–xCr_x O₄‐spinels studied by Mössbauer spectroscopy in external fields