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Titolo:
Preparation of yttrium-iron-garnet nanocrystals dispersed in nanosize-poreglass
Autore:
Taketomi, S; Sorensen, CM; Klabunde, KJ;
Indirizzi:
Kansas State Univ, Dept Phys, Manhattan, KS 66506 USA Kansas State Univ Manhattan KS USA 66506 pt Phys, Manhattan, KS 66506 USA Kansas State Univ, Dept Chem, Manhattan, KS 66506 USA Kansas State Univ Manhattan KS USA 66506 pt Chem, Manhattan, KS 66506 USA Matsumoto Yushi Seiyaku Co Ltd, Osaka 5810075, Japan Matsumoto Yushi Seiyaku Co Ltd Osaka Japan 5810075 Osaka 5810075, Japan
Titolo Testata:
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
fascicolo: 1-2, volume: 222, anno: 2000,
pagine: 54 - 64
SICI:
0304-8853(200012)222:1-2<54:POYNDI>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIGHT-ABSORPTION SPECTRA; MAGNETIC-PROPERTIES; ULTRAFINE PARTICLES; ALKOXIDE METHOD; SILICA-GEL; NANOPARTICLES; RELAXATION; MATRIX; FLUIDS; SIZE;
Keywords:
alkoxide method; magnetic nanoparticle-glass composite; vycor glass; thirsty glass; controlled pore glass; yttrium-iron-garnet; high-density magnetooptical information storage;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Taketomi, S Kansas State Univ, Dept Phys, Cardwell Hall, Manhattan, KS 66506 USA Kansas State Univ Cardwell Hall Manhattan KS USA 66506 506 USA
Citazione:
S. Taketomi et al., "Preparation of yttrium-iron-garnet nanocrystals dispersed in nanosize-poreglass", J MAGN MAGN, 222(1-2), 2000, pp. 54-64

Abstract

Amorphous yttrium-iron-garnet (YIG) nanoparticles were dispersed in kerosene solvent and these colloids were introduced into the nanosize pores of controlled pore glass (CPG). After heat treatment, a YIG nanocrystal-dispersed glass was obtained and observed by electron microscopy. The compounds prepared with different pore size CPG under different heat treatment conditions were identified by X-ray diffraction. For samples with a 292-nm-pore-sizeCPG matrix which were calcined for 2 h, only YIG was observed up to a 800 degreesC calcination temperature. However, at a heat treatment of 2 h at 900 degreesC, the YIG particles decomposed and many kinds of iron and yttriumsilicate compounds were formed. In a 16 h treatment at 675 degreesC, yttrium silicate was also prepared besides YIG. On the other hand, only YIG nanocrystals formed when a rapid temperature rise up to 890 degreesC was followed by immediate cooling. It was also found that iron and yttrium silicates decomposed and iron oxide and yttrium oxide formed by high-temperature treatment at 1200 degreesC. A very rare iron oxide epsilon -Fe2O3 was also found in some samples. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 14:35:59