Magneto-optical properties of manganese ferrite films

Šimša, Z.; Thailhades, Philippe; Presmanes, Lionel; Bonningue, Corine

doi:10.1016/s0304-8853(01)01135-0

Cited by 24 publications

(19 citation statements)

References 3 publications

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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 Samplessupporting

confidence: 56%

“…The total FR in this sample (that of the glass matrix plus that of the paramagnetic additions) is negative and its absolute values in the shorter wavelength range are about an order of magnitude larger than the paramagnetic contributions in samples 2 and 3, while the total amount of paramagnetic oxides in sample 1 is even less than that in the latter ones. In this case, strictly speaking, the contribution [26].…”

Section: As-prepared Samplesmentioning

confidence: 96%

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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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Section: As-prepared Samplessupporting

confidence: 56%

Section: As-prepared Samplesmentioning

confidence: 96%

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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“…An exothermic peak centered at 700°C in DTA which accompanied by a weight loss of $33% in the TG curve could be observed. This can be attributed to the decomposing a mount of Fe(OH) 3 and Mn(OH) 2 precipitates. Moreover, a strong exothermic peak at 1100-1200°C in DTA was accompanied by a weight loss in the TG curve.…”

Section: Dta and Tg Of Mnfe 2 O 4 Precursormentioning

confidence: 99%

“…The MnFe 2 O 4 formation proceeds may be as follows: first, Mn 2+ and Fe 3+ ions reacted to OH À in aqueous ethanol solution formed Fe(OH) 3 and Mn(OH) 2 coprecipitation product, respectively (Eq 1, 2); Subsequently, the obtained Fe(OH) 3 …”

Section: Mechanism Analysis Of Synthesismentioning

confidence: 99%

“…MnFe 2 O 4 is one of the most important magnetic materials, which has a normal spinel structure with tetrahedral A-sites occupied by Mn 2+ ions and octahedral B-sites by Fe 3+ ions, which can be expressed as ( 4 have been widely used in electronic applications, contrast-enhancement agents in magnetic resonance imaging (MRI) technology and recording media because of its unique magnetic, optical, chemical and electronic properties ( Ref 2,3). The performance of these devices is mainly due to the ratio of material surface and volume.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Magnetic Properties of MnFe2O4 Octahedral Microcrystals

Jiao

2011

J. of Materi Eng and Perform

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MnFe 2 O 4 octahedra have been prepared by reaction of Mn 2+ ions and Fe 3+ in alkaline condition via heat treatment of the coprecipitation product. The as-prepared powders were characterized in detail by conventional techniques such as powder x-ray diffraction; field emission electron microscopy and transmission electron microscopy. Vibrating sample magnetometer was used to determine the magnetic properties at room temperature. The results show that the MnFe 2 O 4 octahedra were single crystals with cubic jacobsite structure and a size distribution from 0.8 to 1.0 lm. The octahedra obtained at 1100 and 1200°C exhibited a ferromagnetic behavior with the coercive force (H c ) value of 49.03 and 39.23 Oe, saturation magnetization (M s ) value of 42.93 and 47.98 emu/g and remanent magnetization (M r ) value of 2.16 and 2.55 emu/g, respectively. It is indicated that the heat treatment temperature has a significant effect on the formation of the jacobsite structure. Furthermore, a possible mechanism was also proposed to account for the growth of these products.

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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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Magneto-optical properties of manganese ferrite films

Cited by 24 publications

References 3 publications

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

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

Preparation and Magnetic Properties of MnFe2O4 Octahedral Microcrystals

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

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