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Titolo:
Microstructure and surface composition of ferromagnetic thick films prepared with NiCo polyol-derived powders
Autore:
Bianco, A; Gusmano, G; Montesperelli, G; Morten, B; Prudenziati, M; Zanoni, R; Righini, G;
Indirizzi:
Univ Roma Tor Vergata, Dipartimento Sci & Tecnol Chim, I-00133 Rome, ItalyUniv Roma Tor Vergata Rome Italy I-00133 ecnol Chim, I-00133 Rome, Italy Univ Ancona, Dipartimento Sci Mat & Terra, I-60131 Ancona, Italy Univ Ancona Ancona Italy I-60131 Sci Mat & Terra, I-60131 Ancona, Italy INFM, I-41100 Modena, Italy INFM Modena Italy I-41100INFM, I-41100 Modena, Italy Univ Modena, Dipartimento Fis, I-41100 Modena, Italy Univ Modena Modena Italy I-41100 Dipartimento Fis, I-41100 Modena, Italy Univ Rome La Sapienza, Dipartimento Chim, I-00185 Rome, Italy Univ Rome LaSapienza Rome Italy I-00185 mento Chim, I-00185 Rome, Italy CNR, Area Ric, I-00016 Monterotondo, Rome, Italy CNR Monterotondo Rome Italy I-00016 ic, I-00016 Monterotondo, Rome, Italy
Titolo Testata:
THIN SOLID FILMS
fascicolo: 1, volume: 359, anno: 2000,
pagine: 21 - 27
SICI:
0040-6090(20000124)359:1<21:MASCOF>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
PALLADIUM SUBMICRONIC POWDERS; X-RAY PHOTOEMISSION; MICROWAVE CHARACTERIZATION; MAGNETORESISTIVE SENSORS; METALLIC POWDERS; PARTICLES; CO; COBALT; COPPER; HYDROXIDES;
Keywords:
alloys; cobalt; nickel; surface composition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Bianco, A Univ Roma Tor Vergata, Dipartimento Sci & Tecnol Chim, Via Ric Sci, I-00133 Rome, Italy Univ Roma Tor Vergata Via Ric Sci Rome Italy I-00133 ome, Italy
Citazione:
A. Bianco et al., "Microstructure and surface composition of ferromagnetic thick films prepared with NiCo polyol-derived powders", THIN SOL FI, 359(1), 2000, pp. 21-27

Abstract

Interest in ferromagnetic thick films stems from their magnetoresistive properties which open new opportunities for achieving reliable and cheap contactless physical sensors, In previous work we have studied the properties of different classes of ferromagnetic metal-based thick films, either prepared from commercial Ni-based pastes, or from prototype NiCo-based pastes, including those prepared with NiCo powders obtained with a polyol process. The latter has been found to give comparatively better magnetoresistive and magnetic responses; nevertheless the information on the real microstructure of the films was incomplete, especially with regard to the surface composition and contamination. In this paper results of an investigation aimed at clarifying these features and their evolution with the firing conditions arereported. The study included analyses of powders and films with scanning electron microscopy (SEM) and X-ray photoemission spectroscopy (XPS). Results show the evolution of sintering and grain growth with the peak firing temperature and give evidence of residual contamination of carbonaceous residues on the films together with an extensive surface oxidation, although the firing process was carried out in nitrogen flow. Moreover the film surfacesare Co rich, These results can guide in the choice of composition and processing conditions for further improvement of the magnetic and magnetoresistive properties of the films. (C) 2000 Elsevier Science S.A. All rights reserved.

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Documento generato il 19/09/20 alle ore 09:04:03