Superparamagnetic and ferrimagnetic nanoparticles in glass matrix

Édelman, I. S.; Ivantsov, R. D.; Vasiliev, A. D.; Степанов, С. А.; Kornilova, E. E.; Zarubina, T. V.

doi:10.1016/s0921-4526(01)00274-5

Cited by 15 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Eqs. (1) and (2) the temperatureindependent ''diamagnetic'' A-term arises from the Zeeman splitting of electronic levels in the external magnetic field. The form of this term is similar for FR and MCD: both pass through zero at o¼o aj .…”

Section: Magneto-optical Faraday Rotation and Magnetic Circular Dichrmentioning

confidence: 99%

“…Borate glasses are particularly interesting in this perspective because, in contrast to other glass systems, magnetic nanoparticles in these glasses can be obtained at an exceptionally low doping level [1,2]. The formation of magnetic nanoparticles in as-prepared or thermally treated glasses is possible because of a non-homogeneous spatial distribution of paramagnetic ions in the glass matrix.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Kliava¹,

Édelman²,

Ivanova³

et al. 2011

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Section: Magneto-optical Faraday Rotation and Magnetic Circular Dichrmentioning

confidence: 99%

Section: Introductionmentioning

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

View full text Add to dashboard Cite

“…As a rule, the magnetic properties have been explained by the precipitation of magnetic microparticles in the glass matrix and observed at a rather high content of paramagnetic oxides (~25-30 wt %). The system of potassium aluminoborate glasses was originally proposed by Skorospelova and Stepanov [7] and was subsequently studied in a number of works [8][9][10]. The unique feature of this system is that the properties characteristic of magnetically ordered materials manifest themselves at very low contents of paramagnetic additives (~2.0 wt % of the paramagnetic oxide).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, an important problem is to establish correlations in the "technological parameters-nanoparticle size and structuremagnetic (magneto-optical) properties" sequence for glasses with a variation in only one technological parameter. According to the data obtained in earlier works [7][8][9][10], additional heat treatment is an important stage in the formation of nanoparticles. For this reason, the regime of additional heat treatment was chosen as the varying parameter, whereas the matrix composition 22.5K 2 O · 22.5Al 2 O 3 · 55B 2 O 3 and the contents (wt %) of paramagnetic oxides 1. absorption and light scattering in glasses of this system were studied in our previous work [11].…”

Section: Introductionmentioning

confidence: 99%

Manganese ferrite nanoparticles in borate glass and their influence on the magneto-optical properties

et al. 2005

View full text Add to dashboard Cite

Nanoparticles that are formed in the course of additional heat treatment in borate glasses containing iron and manganese oxide additives at low concentrations are directly observed for the first time using electron microscopy. The size, the shape, and the structure of nanoparticles and their volume distribution in the glass matrix are determined. Correlations between the nanoparticle parameters and the magnetic and magneto-optical properties of the glasses containing these particles are revealed.

show abstract

“…[2,3] A parallel interest also exists in the development of nanocomposite structures containing nanoscale magnetic particles exhibiting single-domain magnetic behavior. [4][5][6] Investigations of magnetic nanocomposites is driven by their novel properties and their potential as new magnetic, optical, and electronic materials. With one exception, [7] however, the Prussian blue class of magnetic materials has not been produced as nanoparticles, and, to the best of our knowledge, there have been no reports of their incorporation into composite structures.…”

mentioning

confidence: 99%

Transparent, Superparamagnetic K${{{\rm I}\hfill \atop x\hfill}}$Co${{{\rm II}\hfill \atop y\hfill}}$[Fe^III(CN)₆]–Silica Nanocomposites with Tunable Photomagnetism

et al. 2003

View full text Add to dashboard Cite

There has been considerable interest in molecular magnets based on the Prussian blue class of transition-metal cyanide complexes.[1] Pioneering work on these materials has realized a broad range of ferro-and ferrimagnetic solids with Curie points ranging from cryogenic to above room temperature. [2,3] A parallel interest also exists in the development of nanocomposite structures containing nanoscale magnetic particles exhibiting single-domain magnetic behavior. [4][5][6] Investigations of magnetic nanocomposites is driven by their novel properties and their potential as new magnetic, optical, and electronic materials. With one exception, [7] however, the Prussian blue class of magnetic materials has not been produced as nanoparticles, and, to the best of our knowledge, there have been no reports of their incorporation into composite structures. Herein we report the fabrication of a new nanocomposite material containingferromagnetic analogue of Prussian blue, in a porous silica matrix. This material is made by a controlled multicomponent sol-gel synthesis in which the precipitation of the Prussian blue analogue is arrested at nanoscale dimensions by gelation of the silica network. The resulting materials are homogeneous, optically transparent, and exhibit superparamagnetic and tunable photomagnetic behavior. We believe that this study suggests a new approach for utilizing the Prussian blue class of magnetic materials in advanced optical and magnetic applications.Homogeneous silica xerogels containing cyanide-bridged Co II /Fe III centers were made by incorporation of both transition-metal components during the solution phase of the synthesis. To obtain homogeneous materials reproducibly, conditions were optimized for the amount of water and the concentration and molar ratio of Co II and ferricyanide by following previously developed procedures. [8,9] In the optimized preparation, Co II nitrate was dissolved in methanol and added to tetramethylorthosilicate. Aqueous potassium ferricyanide was added to this solution to give a 1:1 Co:Fe molar ratio. Upon mixing, the solution turns dark purple, which suggests the formation of the mixed-valence complex. At concentrations up to 0.03 mol % total-metal to silicon (Fe + Co/Si), the solution remained transparent through gelation, aging, and drying, and ultimately yielded a homogeneous, optically transparent xerogel (Figure 1, inset). The spectrum of this glass (Figure 1) is qualitatively similar to that of the bulk materials, with a broad intervalence charge-transfer band in the visible region between 450 and 650 nm and a sharp, higher energy peak around 400 nm. However, the maximum of the intervalence band lies at 452 nm (22 124 cm À1 ) which is blue-shifted by approximately 2900 cm À1 from that of the bulk materials. To determine whether the magnetic behavior was singular, the magnetic susceptibility of these materials was measured as a function of temperature and field strength.[10] Bulk M

show abstract

Superparamagnetic and ferrimagnetic nanoparticles in glass matrix

Cited by 15 publications

References 6 publications

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

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

Manganese ferrite nanoparticles in borate glass and their influence on the magneto-optical properties

Transparent, Superparamagnetic K${{{\rm I}\hfill \atop x\hfill}}$Co${{{\rm II}\hfill \atop y\hfill}}$[Fe^III(CN)₆]–Silica Nanocomposites with Tunable Photomagnetism

Contact Info

Product

Resources

About

Superparamagnetic and ferrimagnetic nanoparticles in glass matrix

Cited by 15 publications

References 6 publications

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

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

Manganese ferrite nanoparticles in borate glass and their influence on the magneto-optical properties

Transparent, Superparamagnetic K${{{\rm I}\hfill \atop x\hfill}}$Co${{{\rm II}\hfill \atop y\hfill}}$[FeIII(CN)6]–Silica Nanocomposites with Tunable Photomagnetism

Contact Info

Product

Resources

About

Transparent, Superparamagnetic K${{{\rm I}\hfill \atop x\hfill}}$Co${{{\rm II}\hfill \atop y\hfill}}$[Fe^III(CN)₆]–Silica Nanocomposites with Tunable Photomagnetism