Magnetic properties and magnetic domain structure of Nd6Dy2Fe82Co4B6 nanocomposite magnets

Citation
Jh. Yin et al., Magnetic properties and magnetic domain structure of Nd6Dy2Fe82Co4B6 nanocomposite magnets, J ALLOY COM, 316(1-2), 2001, pp. 296-298
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
0925-8388 → ACNP
Volume
316
Issue
1-2
Year of publication
2001
Pages
296 - 298
Database
ISI
SICI code
0925-8388(20010302)316:1-2<296:MPAMDS>2.0.ZU;2-2
Abstract
Nd6Dy2Fe82Co4B6 ribbons, prepared by melt spinning, have been investigated by X-ray diffraction (XRD), thermomagnetic analysis (TMA), vibrating sample magnetometer (VSM) and magnetic force microscopy (MFM). XRD and TMA show t hat the ribbons consist of the alpha -Fe phase and the Nd9Fe14B phase. A hi gh remanence ratio of 0.65 and a relatively high coercivity of 4.9 kOe were achieved in the optimal ribbons. The remanence enhancement is attributed t o the exchange coupling between the magnetically hard and the magnetically soft phases. Comparing the MFM image of the optimal ribbon with that of the exchange-decoupled ribbon, we found that the mean magnetic domain size of the optimal ribbon is larger than that of the exchange-decoupled ribbon, wh ich can be attributed to the stronger exchange interaction between grains i n the optimal ribbons. (C) 2001 Elsevier Science B.V. All rights reserved.