Structure and magnetic properties of sputtered hard/soft multilayer magnets
- 9 May 2003
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 93 (10), 8131-8133
- https://doi.org/10.1063/1.1558663
Abstract
The films with and SM=Fe, FeCo were prepared by sputtering and subsequent heat treatment. The coercivity of Ti-buffered single-layer film with 320 nm thickness is as large as 18.8 kOe at room temperature. X-ray diffraction results reveal that the -type phase is randomly oriented in almost all the multilayer films. For the multilayers of the remanence increases and the coercivity decreases with the addition of Fe content, in comparison with the results of the single-layer film and the maximum energy product of 14.8 MGOe is obtained at A noticeable shoulder on the demagnetization curve is observed at low temperatures. When is used as the SM component rather than Fe, similar results are found. The enhancement of the magnetic properties in the nanocomposite multilayer films is explained by means of the exchange coupling between the SM and/or HM nanograins of the intra- and interlayers.
Keywords
This publication has 7 references indexed in Scilit:
- Structure and magnetic properties of sputtered (Nd,Dy)(Fe,Co,Nb,B)5.5/M (M=FeCo,Co) multilayer magnetsJournal of Applied Physics, 2002
- Observations of exchange coupling in Nd2Fe14B/Fe/Nd2Fe14B sandwich structures and their magnetic propertiesJournal of Magnetism and Magnetic Materials, 1999
- High energy products in exchange-coupled nanocomposite filmsIEEE Transactions on Magnetics, 1999
- Magnetic properties of exchange-coupled α-Fe/Nd–Fe–B multilayer thin-film magnetsJournal of Applied Physics, 1997
- Growth characteristics and magnetic properties of sputtered NdFeB thin filmsJournal of Magnetism and Magnetic Materials, 1996
- Remanence enhancement due to exchange coupling in multilayers of hard- and softmagnetic phasesIEEE Transactions on Magnetics, 1996
- Magnetic properties of nanostructured CoSm/FeCo filmsPhysical Review B, 1995