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The magnetic properties of Er/Lu superlattices

Simpson, JA; Cowley, RA; Ward, RCC; Wells, MR; McMorrow, DF; (1997) The magnetic properties of Er/Lu superlattices. J PHYS-CONDENS MAT , 9 (41) 8693 - 8705.

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Abstract

Superlattices of erbium and lutetium were grown by molecular beam epitaxy (MBE) and were examined using x-ray and neutron scattering techniques. When cooled below a temperature of about 86 K, the superlattices develop a coherent longitudinal modulated magnetic structure similar to that found in bulk Er. The structures are coherent over approximately 600 Angstrom, or several superlattice block lengths. When cooled below 65 K, the Er moments also order in the basal plane and form a cycloidal structure for which the coherence length decreases to about 200 Angstrom. At low temperatures, below 20 K, the cone structure of bulk Er is suppressed and the structure of the Er blocks in the superlattice is a commensurate, q = 1/4c*, cycloid. These results are compared with those obtained for bulk Er and for Er/Y superlattices for which the basal-plane strain is of the opposite sign to that of Er/Lu superlattices.

Type: Article
Title: The magnetic properties of Er/Lu superlattices
Keywords: GD-Y SUPERLATTICES, THIN-FILMS, ERBIUM, HOLMIUM
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/60089
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