ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Measurements of x-ray diffraction, magnetization, magnetostriction, and Mössbauer effect were performed on a series of Sm1−xDyxFe2 samples (x=0, 0.1, 0.15, 0.25, 0.45, and 0.65). It is shown that the system retains the cubic MgCu2 structure over the whole range and the lattice constant decreases linearly with increasing x. Results of Mössbauer effect study at room temperature show that for a small amount of Dy substitution for Sm, x〈0.15, easy axes of the magnetization keep in the [111] direction. For x(approximately-greater-than)0.15, the direction of easy axes rotates gradually from [111] for x=0, and 0.1 to [100] for x=0.45 and 0.65. The concentration dependence of the saturation magnetization exhibits a minimum at x=0.30 for 1.5 K and at x=0.45 for room temperature, reflecting the occurrence of the compensation of magnetic moments at various Sm/Dy ratios. For x=0.45 and 0.65, the pinning phenomenon of narrow domain walls was observed at low temperature. The magnetostriction was found to decrease with the increase in the Dy content, as a result of the compensation of λ111 in Sm1−xDyxFe2.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.356636
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