Magnetostriction effect of Co substitution in the Nd6Fe13Si intermetallic compound
| Autor: | F. Pourarian, P. Iranmanesh, Nasser Tajabor |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Condensed matter physics Mechanical Engineering Metals and Alloys Intermetallic Magnetostriction Absolute value General Chemistry Atmospheric temperature range Magnetocrystalline anisotropy Tetragonal crystal system Mechanics of Materials Materials Chemistry Anisotropy Néel temperature |
| Zdroj: | Intermetallics. 42:180-183 |
| ISSN: | 0966-9795 |
| DOI: | 10.1016/j.intermet.2013.06.004 |
| Popis: | We studied the magnetostriction of Nd 6 Fe 13− x Co x Si ( x = 0, 1) intermetallic compounds with tetragonal Nd 6 Fe 13 Si-type structure, using the strain gauge method in the temperature range of 77–600 K under applied magnetic fields up to 1.5 T. The anisotropic magnetostriction (Δ λ ) versus temperature of the studied samples has shown almost similar field-dependence behavior. Below the spin reorientation temperature ( T SR ), Δ λ changes its sign from positive to negative value at an applied threshold field which increases with decreasing temperature. This behavior may originate from the reduction of the magnetocrystalline anisotropy with temperature. It is also observed that absolute value of Δ λ increases by Co substitution. On the other hand, the volume magnetostriction (Δ V / V ) versus field shows different behavior. The Δ V / V curves of Nd 6 Fe 12 CoSi tend to have a nearly quadratic dependence on applied field near magnetic ordering temperature as expected for the parastrictive behavior. The temperature dependence of magnetostriction values is discussed based on the magnetostriction relation of the tetragonal structure to determine the signs of some of magnetostriction constants for these polycrystalline compounds. |
| Databáze: | OpenAIRE |
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