ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Thin dysprosium c-axis films (40–400 A(ring)) were grown coherently between 500-A(ring) lutetium layers by molecular beam epitaxy. Bulk magnetization measurements show that these sandwich structures order magnetically at TN(approximately-equal-to)178 K (=TN of elemental Dy) and undergo ferromagnetic transitions at temperatures which range from 100 K (400 A(ring) Dy) to 175 K (40 A(ring) Dy), significantly enhanced from the bulk TC=85 K. The Dy basal plane lattice parameters in the films were determined by room-temperature x-ray diffraction. We observe a change in these values that correlates with the rise in TC, which suggests that this rise is due to epitaxial strain. The relatively small low-temperature magnetic susceptibility displayed by these samples indicates the presence of a large anisotropy in the basal plane. We address both the issues of the susceptibility and the high ferromagnetic transition temperature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.352428
