Small‐angle neutron scattering from amorphous ErFe2and HoFe2alloys
| Autor: | M. L. Spano, J. J. Rhyne |
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| Rok vydání: | 1988 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 63:3752-3754 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.340656 |
| Popis: | Small‐angle neutron scattering measurements (SANS) have been made an amorphous ErFe2 and HoFe2 alloys as a function of temperature. These alloys show strong ‘‘subcritical’’ scattering as the temperature is lowered below their SANS‐determined transition temperatures (Tf’s) of 105 K (±1 K) and 185 K (±5 K), respectively. The SANS line shapes are Lorentzian above Tf, but become increasingly non‐Lorentzian below Tf and are consistent with a Lorentzian plus Lorentzian‐squared cross section which is appropriate for these random anisotropy systems. The correlation lengths for ErFe2 and HoFe2 at low T are in the range of 60–70 A. Near Tf ErFe2 shows a sharp peak, while for HoFe2 ξ is resolution limited over a range of 25 K below Tf. |
| Databáze: | OpenAIRE |
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