Mössbauer studies of manganese ferrite fine particles processed by ball-milling

Mahmoud, M.H.; Hamdeh, Hussein H.; Ho, J.C.; O’Shea, Michael; Walker, James C. G.

doi:10.1016/s0304-8853(00)00484-4

Cited by 93 publications

(44 citation statements)

References 16 publications

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“…The line widths of sextets corresponding to the B site are large enough to justify fitting with a subspectrum. In many studies, fitting of at least two sextets at the B site have been reported [11,12]. However, in these samples, the line intensities of the B site sextet decreases sharply with the addition of Cr.…”

Section: Resultsmentioning

confidence: 99%

Mössbauer studies of Cr substituted bulk and nano Co–Zn ferrites

et al. 2005

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X-ray and Mössbauer studies have been carried out for bulk and nano sized Cr x Co (0.5−x) Zn 0.5 Fe 2 O 4 (x=0, 0.1, 0.2, 0.25, 0.3, 0.4, 0.5) prepared through wet chemical co-precipitation method. The hyperfine fields in the bulk samples at tetrahedral A site is independent of the substitution while it decreases sharply at octahedral B site due to the quenching of A-B super-exchange interaction due to the addition of Cr ions which preferentially occupy the octahedral B sites. The average particle size for the nano samples was seen to decrease exponentially with the addition of Cr. The RT Mössbauer spectra for all the nano samples show only two paramagnetic doublets showing the superparamagnetic relaxation phenomena in these samples due to small particle sizes involved.

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Section: Resultsmentioning

confidence: 99%

Mössbauer studies of Cr substituted bulk and nano Co–Zn ferrites

et al. 2005

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“…Manganese ferrite particles also prepared by ball milling have also been investigated by Mössbauer spectroscopy in fields of up to 5T [17]. For 82 nm grain sizes a cation distribution (Mn 0.55 Fe 0.45 )[Mn 0.45 Fe 1.55 ]O 4 with an inversion parameter of i=0.45 has been found.…”

Section: Resultsmentioning

confidence: 99%

“…For 82 nm grain sizes a cation distribution (Mn 0.55 Fe 0.45 )[Mn 0.45 Fe 1.55 ]O 4 with an inversion parameter of i=0.45 has been found. For these particles canting angles for the A sites of 30 o and for the B sites of 39 o are reported [17].…”

Section: Resultsmentioning

confidence: 99%

Spin canting in ferrite nanoparticles

et al. 2016

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Recently, an easily scalable process for the production of small (3−7 nm) monodisperse superparamagnetic ferrite nanoparticles MeFe 2 O 4 (Me = Zn, Mn, Co) from iron metal and octanoic acid has been reported (Salih et al., Chem. Mater. 25 1430-1435 2013). Here we present a Mössbauer spectroscopic study of these ferrite nanoparticles in external magnetic fields of up to B = 5 T at liquid helium temperatures. Our analysis shows that all three systems show a comparable inversion degree and the cationic distribution for the tetrahedral A and the octahedral B sites has been determined to (Zn 0.19 Fe 0.81 ) A [Zn 0.81 Fe 1.19 ] B O 4 , (Mn 0.15 Fe 0.85 ) A [Mn 0.85 Fe 1.15 ] B O 4 and (Co 0.27 Fe 0.73 ) A [Co 0.73 Fe 1.27 ] B O 4 . Spin canting occurs presumably in the B-sites and spin canting angles of 33 • , 51 • and 59 • have been determined for the zinc, the manganese, and the cobalt ferrite nanoparticles.

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“…Presently, there are few methods for the synthesis of manganese ferrite particles, such as ceramic [7], coprecipitation [8][9][10][11][12], hydrothermal method [13], reverse micelle [14,15], sol-gel [16], combustion method [17], mechanosynthesis [18][19][20], high-energy technologies [21,22], and mechanical doping [23,24]. Hydrophase methods allow regulating composition, crystallinity, and particle morphology.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Contact Non-equilibrium Plasma on Structural and Magnetic Properties of Mn Х Fe3 − X О4 Spinels

Frolovа

Derhachov

2017

Nanoscale Res Lett

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Nano-sized manganese ferrites Mn х Fe 3 − х О 4 (х = 0-1.3) were prepared using contact non-equilibrium plasma (CNP) in two different pH (11.5 and 12.5). The influence of synthesis conditions (e.g., cation ratio and initial pH) on phase composition, crystallite size, and magnetic properties were investigated employing X-ray diffraction (XRD), differential thermal analysis (DTA), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and magnetic measurement techniques. The formation of monodispersed faceted ferrite particles at х = 0-0.8 was shown. The FTIR spectra revealed reflection in region 1200-1700 cm −1 caused by the presence of water adsorbed on the surface of Fe 3 − x Mn x O 4 micro-granules or embedded into their crystal lattice. The most sensitivity of reflection spectra to the composition changes takes place within a 400-1200 cm ). The XRD results showed that the nanocrystalline Mn х Fe 3 − х О 4 (0 < x < 1.0) had cubic spinel crystal structure with average crystallite size 48-49 A. The decrease of crystalline size with the x increase was also observed.

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Mössbauer studies of manganese ferrite fine particles processed by ball-milling

Cited by 93 publications

References 16 publications

Mössbauer studies of Cr substituted bulk and nano Co–Zn ferrites

Mössbauer studies of Cr substituted bulk and nano Co–Zn ferrites

Spin canting in ferrite nanoparticles

The Effect of Contact Non-equilibrium Plasma on Structural and Magnetic Properties of Mn Х Fe3 − X О4 Spinels

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