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  Structure and magnetic properties of iron-platinum particles with γ-ferric-oxide shell

Basit, L., Nepijko, S. A., Shukoor, I., Ksenofontov, V., Klimenkov, M., Fecher, G. H., et al. (2009). Structure and magnetic properties of iron-platinum particles with γ-ferric-oxide shell. Applied Physics A, 94(3), 619-625. doi:10.1007/s00339-008-4874-7.

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Basit, L.1, Author
Nepijko, S. A.1, Author
Shukoor, I.1, Author
Ksenofontov, V.1, Author
Klimenkov, M.1, Author
Fecher, G. H.1, Author
Schöhense, G.1, Author
Tremel, W.1, Author
Felser, C.2, Author           
Affiliations:
1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: Nanoparticles of solid solution Fe (x) Pt(1-x) , where 0.25a parts per thousand yenxa parts per thousand yen0 ( fcc lattice) with gamma-Fe(2)O(3) shell (lattice of the spinel type) were synthesised and characterised by high-resolution transmission electron microscopy, energy dispersive X-ray analysis, electron energy loss spectroscopy, Mossbauer spectroscopy and magnetometry. From the point of view of magnetic properties, such two-phase particles are interesting because their core is antiferromagnetic or paramagnetic (at very small values of x) whereas the shell is ferrimagnetic. The size of the particles was in the range of several nanometers. The Mossbauer measurements revealed a blocking temperature of about 100 K above which the particles are superparamagnetic. Towards lower temperatures, the magnetic characteristics of an ensemble of such particles show an increase of magnetic rigidity.

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 Dates: 2009-03-01
 Publication Status: Issued
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 Rev. Type: -
 Identifiers: ISI: 000262504200031
DOI: 10.1007/s00339-008-4874-7
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Title: Applied Physics A
  Other : Appl. Phys. A
Source Genre: Journal
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Publ. Info: Heidelberg : Springer-Verlag Heidelberg
Pages: - Volume / Issue: 94 (3) Sequence Number: - Start / End Page: 619 - 625 Identifier: ISSN: 0947-8396
CoNE: https://pure.mpg.de/cone/journals/resource/954928582869_1