| Autor: |
K. Rećko, Hartmut Fuess, B. Yu Kotur, Ludwik Dobrzyński, W. Suski, Anatoliy Senyshyn, Krzysztof Szymański |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Journal of Magnetism and Magnetic Materials. 323:1860-1867 |
| ISSN: |
0304-8853 |
| DOI: |
10.1016/j.jmmm.2011.02.023 |
| Popis: |
The crystallochemical and magnetic nature of ternary Sc1+δFe4−δAl8 intermetallic with a small Sc excess δ=0.1 was investigated by scanning electron microscope, X-ray powder diffraction, neutron diffraction, Mossbauer effect and superconducting quantum interference device techniques. The sample crystallizes in a tetragonal ThMn12 type structure. The excess of Sc atoms substitute Fe at the (8f) positions and have a pronounced effect on the magnetic properties. The experiments carried out in temperature range 4–320 K show that below 120 K the magnetic structure of the alloy forms a double cycloid with magnetic moments rotating according to the incommensurate in-plane wave vector, which is temperature independent up to 160 K. The value of Fe magnetic moment is close to 0.9 μB atom−1 at 4 K. Temperature dependence of unit cell dimensions can be explained within the Debye–Gruneisen approximation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect