The crystallization, magnetic and magnetocaloric properties in Fe76.5−xNbxSi15.5B7Au1 ribbons
| Autor: | N.Q. Hoa, Nguyen Chau, D. T. H. Gam, Seong-Cho Yu |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Amorphous metal Condensed matter physics Analytical chemistry Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Amorphous solid Magnetization Differential scanning calorimetry Ferromagnetism law Magnetic refrigeration Curie temperature Crystallization |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 310:2483-2485 |
| ISSN: | 0304-8853 |
| Popis: | Fe 76.5− x Nb x Si 15.5 B 7 Au 1 ribbons ( x =0.0, 1.5, 3.0, 4.5) have been fabricated by rapid quenching technique. The DSC measurements indicated that both first exothermal peak T p1 (of α -Fe(Si) phase) and second peak T p2 (of boride phase) as well as crystallization activation energy increase with increasing Nb content substituted, whereas saturation magnetization of samples decreases with x , due to ferromagnetic dilution. Besides, Curie temperature of amorphous phase decreases with x , i.e. Nb stabilizes amorphous structure of ribbons. The investigation of magnetic entropy change of studied samples showed that it may lead to magnetocaloric effect around respective Curie temperature of amorphous phase. |
| Databáze: | OpenAIRE |
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