Spontaneous Magnetostriction of Lu2Fe17-xSix |
| A.V. Andreev a and S. Daniš b
a Institute of Physics ASCR, Na Slovance 2, 182 21 Prague, Czech Republic b Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Ke Karlovu 5, 121 16 Prague, Czech Republic |
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| Received: 9 07 2007; |
| Thermal expansion of Lu2 Fe17-xSix solid solutions was measured by X-ray powder diffraction. The magnetic ordering in all compounds within the homogeneity range (x ≤ 3. 4) is accompanied by a large spontaneous volume magnetostriction distributed anisotropically over the principal axes of the hexagonal crystal structure. The volume effect ωs in the ground state reaches 14.7 × 10-3 in Lu2Fe17 and decreases monotonously to 8.9 × 10-3 at x = 3.4 following the reduction of magnetic moment. Despite still large ωs, the Invar behavior observed in Lu2Fe17 changes to a positive thermal expansion for x > 1 due to increasing Curie temperature. |
| DOI: 10.12693/APhysPolA.113.239 PACS numbers: 75.50.-y, 75.80.+q |