Mössbauer and magnetic susceptibility measurements on M-type hexagonal Ba-ferrite

Lipka, J.; Grusková, A.; Orlický, Oto; Sitek, J.; Miglierini, Marcel; Gröne, R.; Hucl, M.; Tóth, I.

doi:10.1007/bf02401253

Cited by 13 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1). [12]. The magnetic behavior of the compounds has been explained, mainly due to the interactions amongst the ions occupying these five sites.…”

Section: Results and Discussion:-mentioning

confidence: 99%

See 1 more Smart Citation

Study of Crystalline Parameters and Dc Electrical Conductivity of Li-Al Ferrites.

SDarokar¹

2017

IJAR

View full text Add to dashboard Cite

M type lithium ferrites substituted by aluminium having general chemical formula Li 0.5 Fe 0.5+x Al 12-X O 19 (where x = 1 to 6) were prepared by standard solid state reaction method The compounds are in single hexagonal phase without traces of uncertainly ambiguous reflection. From XRD pattern lattice parameters has recorded with increasing doped aluminium element in the range from a = 5.807 Å to 5.906 Å and c = 22.507 Å to 22.585 Å pertaining the space group P6 3 /mmc (No.194). The mass density of the ferrites were found linearly varies and depends upon the mass and volume of sample. The X-Ray density has depends upon the lattice constant and molecular weight of the compounds. The average particle size was also estimated. Electrical properties such as dc conductivity, activation energy were studied. Also, the type of carriers responsible in each was determined from thermoelectric studies. The higher resistivity of the compounds Li 0.5 Fe 0.5+x Al 12-X O 19 suggests less presence of mixed valence cations on equivalent lattice. While Fe show low value due to the ferrous ions present on the octahedral sites along with ferric ions.Copy Right, IJAR, 2017,. All rights reserved. …………………………………………………………………………………………………….... Introduction:-The critical literature survey revealed that the electrical properties of hexagonal [1-4] M-type ferrites are less studied compared to its magnetic properties. This may be due to the fact that they were developed initially as permanent magnet.[5-8] Today M-type ferrites are finding applications in many diverse fields like microwave and hence their electrical properties are also becoming important. Many attempts have been made to improve the properties of M ferrites by variety of substitutions. Though M-type ferrite does not contain any monovalent cation, hence a combination of monovalent cation with some multivalent cations for charge compensation may be substituted. With this idea, a new series of materials for permanent magnets of Ba-ferrites were developed for the first time. [9][10]. Since the properties of ferrite depend on the interactions among the cations distributed over various sites, these were explained on the basis of the knowledge of site distribution of cations in the magnetoplumbite structure. In the present work M-type ferrites having common formula Li 0.5 Fe 0.5+x Al 12-X O 19 were prepared and their electrical properties such as conductivity, activation energy and thermoelectric power were studied Materials and Methods:-The M-type compounds in the present investigations were prepared using the standard solid-state reaction method. [11,12] using AR grade oxides as starting materials. Preparation of ferrites from Hexagonal family are usually difficult as compared to Spinel ferrites and especially the M-type ferrite is one of the most difficult one. This

show abstract

“…1). [12]. The magnetic behavior of the compounds has been explained, mainly due to the interactions amongst the ions occupying these five sites.…”

Section: Results and Discussion:-mentioning

confidence: 99%

“…[11,12] using AR grade oxides as starting materials. Preparation of ferrites from Hexagonal family are usually difficult as compared to Spinel ferrites and especially the M-type ferrite is one of the most difficult one.…”

Section: Materials and Methods:-mentioning

confidence: 99%

Study of Crystalline Parameters and Dc Electrical Conductivity of Li-Al Ferrites.

SDarokar¹

2017

IJAR

View full text Add to dashboard Cite

show abstract

“…Although the parameters for the 12k and 2b components are clearly distingushable from the remaining components due to the high rlative intensity of the first and the large quadrupole splitting of the second, clear disagreements were found even on the parameters of these components. Hyperfine fields for the 4f 2 were reported between about 512 kOe [35,36] and 528 kOe [37], which differ by more than the usual experimental uncertainty of 5 kOe. Furthermore, the intensity for this component (with a theoretical value of 50%) was reported between 46.4% [38] and 50.6% [35,36].…”

Section: Introductionmentioning

confidence: 86%

“…Hyperfine fields for the 4f 2 were reported between about 512 kOe [35,36] and 528 kOe [37], which differ by more than the usual experimental uncertainty of 5 kOe. Furthermore, the intensity for this component (with a theoretical value of 50%) was reported between 46.4% [38] and 50.6% [35,36]. While on the other hand, values of the quadrupole splitting for the 2b component were reported between as low as 2.03 mm/s [39] and as high as 2.30 mm/s [40], with a variation significantly higher than the usually accepted experimental uncertainty of 0.02 mm/s.…”

Section: Introductionmentioning

confidence: 86%

Magnetic Properties and Hyperfine Interactions in M-Type BaFe12-2xMoxZnxO19 Hexaferrites

Mahmood¹,

Dushaq²,

Bsoul³

et al. 2014

JAMP

View full text Add to dashboard Cite

A series of M-Type barium hexaferrites with the general composition BaFe12-2xMoxZnxO19 were synthesized at 1100˚C by a simple wet chemical mixture route. The properties of the prepared samples were examined by X-ray diffraction, scanning electron microscopy, vibrating sample magnetometry, and Mössbauer spectroscopy. The diffraction patterns for all samples were found to agree well with the standard pattern of BaFe12O19 hexaferrite with no extraneous diffraction peaks. The products formed as well crystallized hexagonal platelet-like particles while the EDS measurements revealed the stoichiometric cationic ratios of the prepared samples. The spectral variations elucidated by Mössbauer spectroscopy were utilized to determine the different cation preferential site occupations as a function of x. Finally, the saturation magnetizations, magnetic anisotropies, and the anisotropy fields, determined from the magnetic measurements, showed consistency with the relative subspectral Mössbauer intensities and the single ion model for the anisotropy constant.

show abstract

“…Over the past 50 years, large research efforts into hexagonal M and W type ferrites have been made because of its relevance to certain technological applications and promising properties, such as for use in permanent magnets due to its high value of magnetization, in microwave devices for its microwave absorbing capability owing to its high permeability, and in magnetic recording media [1,[5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Mössbauer Study of the Dynamics in BaFe₁₂O₁₉Single Crystals

Choi¹,

Sur²,

Lim³

et al. 2012

Journal of Magnetics

View full text Add to dashboard Cite

Mössbauer spectra of hexagonal BaFe 12 O 19 single crystals were studied at various temperatures (4-300 K). It was found that the spin states in Fe atoms were parallel to the γ-ray's direction into a single crystal along the caxis. The location of the Fe ion in the 2b site is unusual in an oxide structure and has strong anisotropic lattice vibrations. Moreover, at room temperature, the zero absorption lines of the Fe ions at the 2b site were observed due to fast diffusion motion in a double well atomic potential. The two Fe ions of the single crystal mainly enter into the sites in the mirror plane of the trigonalbipyramidal structure.

show abstract

Mössbauer and magnetic susceptibility measurements on M-type hexagonal Ba-ferrite

Cited by 13 publications

References 3 publications

Study of Crystalline Parameters and Dc Electrical Conductivity of Li-Al Ferrites.

Study of Crystalline Parameters and Dc Electrical Conductivity of Li-Al Ferrites.

Magnetic Properties and Hyperfine Interactions in M-Type BaFe12-2xMoxZnxO19 Hexaferrites

Mössbauer Study of the Dynamics in BaFe₁₂O₁₉Single Crystals

Contact Info

Product

Resources

About

Mössbauer and magnetic susceptibility measurements on M-type hexagonal Ba-ferrite

Cited by 13 publications

References 3 publications

Study of Crystalline Parameters and Dc Electrical Conductivity of Li-Al Ferrites.

Study of Crystalline Parameters and Dc Electrical Conductivity of Li-Al Ferrites.

Magnetic Properties and Hyperfine Interactions in M-Type BaFe12-2xMoxZnxO19 Hexaferrites

Mössbauer Study of the Dynamics in BaFe12O19Single Crystals

Contact Info

Product

Resources

About

Mössbauer Study of the Dynamics in BaFe₁₂O₁₉Single Crystals