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Titolo:
MAGNETIZATION REVERSAL MEASUREMENTS OF SIZE-SELECTED IRON-OXIDE PARTICLES PRODUCED VIA AN AEROSOL ROUTE
Autore:
SCHLEICHER B; TAPPER U; KAUPPINEN EI; MARTIN M; ROSCHIER L; PAALANEN M; WERNSDORFER W; BENOIT A;
Indirizzi:
VTT CHEM TECHNOL,VTT AEROSOL TECHNOL GRP,POB 1401 FIN-02044 ESPOO FINLAND HELSINKI UNIV TECHNOL,LOW TEMP LAB FIN-02150 ESPOO FINLAND CNRS,CRTBT F-38042 GRENOBLE FRANCE CNRS,LAB LOUIS NEEL F-38042 GRENOBLE FRANCE
Titolo Testata:
Applied organometallic chemistry
fascicolo: 5, volume: 12, anno: 1998,
pagine: 315 - 320
SICI:
0268-2605(1998)12:5<315:MRMOSI>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATOMIC-FORCE MICROSCOPE;
Keywords:
MAGNETIZATION REVERSAL; IRON OXIDE PARTICLES; SQUID; ATOMIC FORCE MICROSCOPY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
B. Schleicher et al., "MAGNETIZATION REVERSAL MEASUREMENTS OF SIZE-SELECTED IRON-OXIDE PARTICLES PRODUCED VIA AN AEROSOL ROUTE", Applied organometallic chemistry, 12(5), 1998, pp. 315-320

Abstract

We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane ofthe SQUID, we can measure the magnetization reversal of the particlesby the flux they induce into the SQUID. The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly. If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal. (C) 1998 John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 02:28:45