Abstract
The amorphous state of ferromagnetic Fe,8Si9B|3 (Metglas 2605S-2) and its nanocrystallization were investigated by I'M situ transmission electron microscope (TEM), Xray diffraction (XRD), Mössbauer spectroscopy (MS), differential scanning calorimeters (DSC) and magnetic moment measurements. The Mössbauer spectrum exhibited an essentially symmetric hyperfine field pattern of 259KOe in as-quenched amorphous state at room temperature. The Curie and crystallization temperature were determined to be rc=708K and T= 803K, respectively. The Tx value was in good agreement with DSC measurement results. The occupied fraction of the nanocrystalline phases of cc-Fe(Si) and Fe2B at I'M situ optimum annealing temperature was about 57% and 43%, respectively. It is notable that the magnetization of the amorphous phase decreases more rapidly with increasing temperature than those of nanocrystalline ferromagnetism, suggesting the presence of the distribution of exchange interaction in the amorphous phase or high metalloid contents.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 617-622 |
| Number of pages | 6 |
| Journal | Materials Research Society Symposium - Proceedings |
| Volume | 577 |
| DOIs | |
| State | Published - 1999 |
| Externally published | Yes |
| Event | MRS Spring Meeting - Symposium H: Advanced Hard Magnets-Principles, Materials, and Processing - Symposium I: Amorphous and Nanocrystalline Materials for Hard and Soft Magnetic Applications - San Francisco, CA, United States Duration: Apr 5 1999 → Apr 8 1999 |
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering