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Cited by 301

The DOI matches its Crossref record; 22 of the 22 references it cites were found in a registry or an index.

Sonochemical Preparation of Nanosized Amorphous NiFe2O4 Particles

Shafi, Kurikka V. P. M., Koltypin, Yuri, Gedanken, Aharon, Prozorov, Ruslan, Balogh, Judit, Lendvai, Janos, Felner, Israel·1997·The Journal of Physical Chemistry B

Abstract

Nanosized amorphous NiFe 2 O 4 powder was prepared by sonochemical decomposition of solutions of volatile organic precursors, Fe(CO) 5 and Ni(CO) 4, in decalin at 273 K, under an oxygen pressure of 100−150 kPa. The amorphous nature of these particles was confirmed by various techniques, such as SEM, TEM, electron microdiffraction, and X-ray diffractograms. Magnetic measurements, Mössbauer, and EPR spectral studies indicated that the as-prepared NiFe 2 O 4 ferrite particles were superparamagnetic. The Mössbauer spectrum of the crystallized sample showed a clear sextet pattern, with hyperfine field values of 500 and 508 kOe for A (tetrahedral) and B (octahedral) sublattices, respectively, of the inverse spinel NiFe 2 O 4 . Saturation magnetization of the annealed sample (25 emu/g) was significantly lower than that for the reported multidomain bulk prticles (55 emu/g), reflecting the ultrafine nature of the sample. Thermogravimetric measurements with a permanent magnet gave Curie temperatures of 440 °C for amorphous and 560 °C for the crystallized forms.

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Metadata

Authors
Shafi, K. V. P. M., Koltypin, Y., Gedanken, A., Prozorov, R., Balogh, J., Lendvai, J., & Felner, I.
Venue
The Journal of Physical Chemistry B
Published
1997-08-01
Volume
101
Issue
33
Pages
6409-6414
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
OpenAlex
W2032886404
Cited by
301
References
22
FWCI
5.23
Type
journal article
Language
en
Open access
closed

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