| Autor: |
Lei Cao, Hua-yang Gong, Bao-gen Shen, Lin-shu Kong, Jian-gao Zhao, Yi-long Chen |
| Rok vydání: |
1993 |
| Předmět: |
|
| Zdroj: |
Journal of Alloys and Compounds. 196:183-186 |
| ISSN: |
0925-8388 |
| Popis: |
The compounds Gd 2 Fe 17 C x have been prepared by arc melting for x ⩽ 1 and by melt spinning for x > 1. 57 Fe Mossbauer experiments have been used to study these compounds. The spectra have been analysed in terms of seven subspectra by assuming a subdivision of the 18 f , 18 h and 9 d sites into two groups with a relative intensity ratio of 1:2. It is found that the effective hyperfine fields H eff at 12 K do not change much with C content x , while the H eff values at 293 K show a strong increase for small C content. The average isomer shifts (IS) increase with C content and the values of Δ(IS)/Δ(ln V ) are close to the typical value of 1.0 mm s −1 for a close-packed structure. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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