Magnetic characterization of nanocrystalline iron samples with different size distributions

• Autorzy: Typek J. , Zolnierkiewicz G. , Pelka R. , Kielbasa K , Arabczyk W , Guskos N.

Identyfikatory

DOI

10.2478/s13536-014-0223-z

• Języki publikacji: EN

Abstrakty

EN

Nanocrystalline iron was obtained by fusing magnetite and promoters. The oxidized form was reduced with hydrogen and passivated (sample P0). The average nanocrystallite size in sample P0 was d(P0) =16 nm and the width of size distribution was s(P0) = 18 nm. Samples of nanocrystalline iron with narrower diameter ranges and larger and smaller average crystallite sizes were also synthesized. They were: sample P1 (d(P1) = 28 nm, s(P1) = 5 nm), sample P2 (d(P2) = 22 nm, s(P1) = 5 nm), sample P3 (d(P3) = 12 nm, s(P1) = 9 nm). These four samples were studied at room temperature by dc magnetization measurements and ferromagnetic resonance at microwave frequency. Correlations between samples sizes distributions (average size and width of the sizes) and magnetic parameters (effective magnetization, anisotropy field, anisotropy constant, FMR linewidth) were investigated. It was found that the anisotropy field and effective magnetization determined from FMR spectra scale linearly with nanoparticle sizes, while the effective magnetic anisotropy constant determined from the hysteresis loops decreases with nanoparticle size increase.

Słowa kluczowe

EN

nanocrystalline iron; ferromagnetic resonance; magnetic property

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2014
• Tom: Vol. 32, No. 3
• Strony: 423—429
• Opis fizyczny: Bibliogr. 22 poz., tab., wykr.

Twórcy

autor

Typek J.

• Institute of Physics, West Pomeranian University of Technology, 48 Piastow Str., 70-311 Szczecin, Poland

autor

Zolnierkiewicz G.

• Institute of Physics, West Pomeranian University of Technology, 48 Piastow Str., 70-311 Szczecin, Poland

autor

Pelka R.

• Institute of Chemical and Environment Engineering, West Pomeranian University of Technology 10 Pulaskiego Str., 70-322 Szczecin, Poland

autor

Kielbasa K

• Institute of Chemical and Environment Engineering, West Pomeranian University of Technology 10 Pulaskiego Str., 70-322 Szczecin, Poland

autor

Arabczyk W

• Institute of Chemical and Environment Engineering, West Pomeranian University of Technology 10 Pulaskiego Str., 70-322 Szczecin, Poland

autor

Guskos N.

• nstitute of Physics, West Pomeranian University of Technology, 48 Piastow Str., 70-311 Szczecin, Poland
• Department of Solid State Physics, Faculty of Physics, University of Athens, Panepistimiopolis, 15 784 Zografos, Athens, Greece

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