Study of the magnetic properties of the permanent magnets by Mössbauer spectroscopy

Aliev, Sh. M.; Kamilov, I. K.; Guseynov, M. M.; Aliev, M. Sh.; Mamedov, V. V.; Исмаилов, Ш. М.

doi:10.1016/j.jmmm.2008.07.030

Cited by 3 publications

(2 citation statements)

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“…Ferrites with a hexagonal structure (hexaferrites) were discovered in 1950s [9], and extensive research work involving the fabrication and control of the physical properties of these ferrites demonstrated their feasibility of replacing other ferrites and magnetic materials in a large variety of applications [10][11][12]. Among these hexaferrites, perhaps M-type hexaferrites are some of the earliest realized and most widely used for permanent magnet [13][14][15] and high density magnetic recording media [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Modification of the Magnetic Properties of Co<sub>2</sub>Y Hexaferrites by Divalent and Trivalent Metal Substitutions

Mahmood

Zaqsaw

Mohsen

et al. 2015

SSP

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Abstract. The present study is concerned with the fabrication and characterization of Me2Y substituted hexaferrites, Ba2Me2Fe12-xTxO22 (Me = Co 2+ , Mg 2+ , and Cr 2+ , and T = Fe 3+ , and Ga 3+ ). The samples were prepared by the conventional ball milling technique and sintering at 1200° C. The effect of the choices of Me and T ions on the structural and magnetic properties of the hexaferrites were investigated. XRD patterns, magnetic parameters, and Mössbauer spectra of the Co2Y were consistent with a single phase Y-type hexaferrite. However, the CoCr-Y sample was found to be dominated by the Y-type hexaferrite, and M-type and BaCrO4 minority phases were observed in the XRD pattern of the sample. The small increase in saturation magnetization from about 34 emu/g up to 37.5 emu/g was therefore attributed to the development of the M-type phase. On the other hand,

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Section: Introductionmentioning

confidence: 99%

Modification of the Magnetic Properties of Co<sub>2</sub>Y Hexaferrites by Divalent and Trivalent Metal Substitutions

Mahmood

Zaqsaw

Mohsen

et al. 2015

SSP

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“…[10][11][12] They are more-or-less the same, showing that our samples are of stoichiometric composition and good quality.…”

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confidence: 59%

Mössbauer spectroscopy study of Al distribution in BaAlxFe12−xO19 thin films

Przybylski

Żukrowski

Harward

et al. 2015

Journal of Applied Physics

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Barium hexagonal ferrite (BaM) films grown on Si are a good candidate material for new-generations of on-wafer microwave devices operating at frequencies above 40 GHz. Doping BaM with Al increases the value of anisotropy field even more, and in combination with a large value of remanence, would allow one to create a self-biasing material/structure that would eliminate the need for permanent bias magnets in millimeter wave devices. To examine the occupation of Fe sublattices by Al ions, we carried out Conversion Electron Mössbauer Spectroscopy (CEMS) measurements at room temperature and zero magnetic field (after magnetizing the samples in a strong magnetic field). The spectra can be reasonably fitted with three components (sub-spectra) corresponding to different Fe sublattices. There are significant changes in the spectra with the addition of Al: The magnetic hyperfine field decreases for all three components, and their relative contributions also change remarkably. These observations are in agreement with the fact that the Al substitutes Fe, thus lowering the component contributions and the value of the hyperfine field. In addition, our previous XRD analysis indicates increasing grain misalignment with Al content, further supporting the CEMS data.

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Study of domain structure of magnetic powder particles by Mössbauer spectroscopy

Aliev

Kamilov

Guseynov

et al. 2010

Journal of Magnetism and Magnetic Materials

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Study of the magnetic properties of the permanent magnets by Mössbauer spectroscopy

Cited by 3 publications

References 5 publications

Modification of the Magnetic Properties of Co<sub>2</sub>Y Hexaferrites by Divalent and Trivalent Metal Substitutions

Modification of the Magnetic Properties of Co<sub>2</sub>Y Hexaferrites by Divalent and Trivalent Metal Substitutions

Mössbauer spectroscopy study of Al distribution in BaAlxFe12−xO19 thin films

Study of domain structure of magnetic powder particles by Mössbauer spectroscopy

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