Abstract
The magnetic behavior of hard-magnetic nanocomposites such as Pt-Fe thin films and Sm-Co-Cu-Ti cellular magnets is investigated. A quite general free-energy series expansion shows that the temperature dependence of the coercivity of hard-magnetic nanostructures is largely determined by the intrinsic temperature dependence of the micromagnetic parameters. By contrast, thermally activated jumps over micromagnetic energy barriers are small perturbations observed as sweep-rate dependence.
Original language | English (US) |
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Pages (from-to) | 531-535 |
Number of pages | 5 |
Journal | Scripta Materialia |
Volume | 47 |
Issue number | 8 |
DOIs | |
State | Published - Oct 2002 |
Keywords
- Coercivity
- Hard magnets
- Magnetic properties
- Nanocomposite
- Nanocrystalline materials
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys