Evolution of the structure and magneto-optical properties of Mn x Fe3 − x O4 films prepared by solid-state reactions

Édelman, I. S.; Ivanova, O. S.; Polyakova, K. P.; Polyakov, V. V.; Bayukov, O. A.

doi:10.1134/s106378340812010x

Cited by 4 publications

(5 citation statements)

References 5 publications

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“…On the other hand, in the FR spectrum of Fe 3 O 4 two peaks are observed at ca . 480 (negative) and 730 nm (positive) 58. The latter spectrum is very similar to those of thermally treated sample 3, cf .…”

Section: Transparent Magnetic Glassessupporting

confidence: 70%

“…For the Fe 3 O 4 nanoparticles, the maximum of FR should occur at ca . 750 nm, this wavelength corresponding to the spin‐allowed 5 T 2 – 5 E transition in Fe 2+ ions of 3 d 6 configuration, as have been observed for Fe 3 O 4 thin films 58. In the case of 3 d 5 Mn 2+ and Fe 3+ ions, one can expect to observe contributions to the FR in the 600–1500 nm range from electronic transitions 6 A 1 – 4 T 1 , 6 A 1 – 4 T 2 , 6 A 1 – 4 A 1 , 4 E in tetrahedral coordination and 6 A 1g – 4 T 1g , 6 A 1g – 4 T 2g , 6 A 1g – 4 A 1g , 4 E g in octahedral coordination, as, indeed, has been the case for manganese ferrite thin films 58–60.…”

Section: Bibliographical Synopsissupporting

confidence: 60%

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Oxide glasses with magnetic nanoparticles: transparent magnets (Faraday rotation and electron magnetic resonance studies)

Édelman

Kliava

2009

Physica Status Solidi (b)

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In the first part of this paper we outline the state of the art in the field of magnetic nanoparticles in oxide glasses. We describe the theoretical background of two complementary techniques used for the studies of the state of paramagnetic ions, clusters and magnetic particles in a diamagnetic matrix, viz., magnetooptical Faraday rotation (FR) and electron magnetic resonance (EMR) and we overview previous results obtained with these techniques for several glass systems. In the second part, we highlight the case of potassium-alumina-borate glasses -a glassy system where doping with paramagnetic oxides results in formation of magnetic particles at very low contents of paramagnetic additions: Fe 2 O 3 and MnO. In the special case when the ratio of the iron and manganese oxides in the charge is 3/2, magnetic nanoparticles with characteristics close to those of manganese ferrite are formed already at the first stage of the glass preparation. After thermal treatment all glasses show FR and EMR spectra attesting to the presence of superparamagnetic nanoparticles, characterized by relatively broad size and shape distributions. The formation of magnetic nanoparticles confers to these glasses magnetic and magnetooptical properties typical of magnetically ordered substances. At the same time, the glasses remain transparent in a part of the visible and near infrared spectral range and display a high FR value. Such properties make them particularly interesting for use as new media for various magneto-optical devices.

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Section: Transparent Magnetic Glassessupporting

confidence: 70%

Section: Bibliographical Synopsissupporting

confidence: 60%

Oxide glasses with magnetic nanoparticles: transparent magnets (Faraday rotation and electron magnetic resonance studies)

Édelman

Kliava

2009

Physica Status Solidi (b)

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“…As follows from the Tanabe-Sugano diagram for excited energy levels of the 3d ions [27], in the studied spectral range, one can expect to observe the contributions to the MCD of intra-configurational transitions, in particular, for the 3d 5 Mn 2 + and Fe 3 + ions, of the electronic transitions 6 A 1 -4 T 1 , 6 A 1 -4 T 2 , 6 A 1 -4 A 1 , 4 E in tetrahedral coordination and 6 A 1g -4 T 1g , 6 A 1g -4 T 2g , 6 A 1g -4 A 1g , 4 E g in octahedral coordination. Such transitions have indeed been observed in manganese ferrite thin films [24,26].…”

Section: As-prepared Samplesmentioning

confidence: 94%

“…Both as-prepared samples and heat-treated samples were investigated. Besides, a polycrystalline manganese ferrite thin film of composition close to stoichiometric was synthesized with the solid reaction technique [24] and used as a reference sample in order to test the attribution of the nature of nanoparticles in borate glasses put forward in Ref. [4].…”

Section: Methodsmentioning

confidence: 99%

Electron magnetic resonance and magnetooptical studies of nanoparticle-containing borate glasses

Kliava¹,

Édelman²,

Ivanova³

et al. 2011

Journal of Magnetism and Magnetic Materials

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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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Evolution of the structure and magneto-optical properties of Mn x Fe3 − x O4 films prepared by solid-state reactions

Cited by 4 publications

References 5 publications

Oxide glasses with magnetic nanoparticles: transparent magnets (Faraday rotation and electron magnetic resonance studies)

Oxide glasses with magnetic nanoparticles: transparent magnets (Faraday rotation and electron magnetic resonance studies)

Electron magnetic resonance and magnetooptical studies of nanoparticle-containing borate glasses

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

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