HELICAL MAGNETIC ORDER AND SPIN SLIPS IN HOLMIUM-YTTRIUM SUPERLATTICES

Autor:	N. Hagmann, R A Cowley, M. R. Wells, D. F. McMorrow, K.N. Clausen, D. A. Jehan, P.P. Swaddling, R.C.C. Ward
Jazyk:	angličtina
Rok vydání:	1993
Předmět:	Materials science Magnetic moment Magnetic structure Condensed matter physics Superlattice Neutron diffraction General Physics and Astronomy chemistry.chemical_element Yttrium Neutron scattering Nuclear magnetic resonance chemistry Ferromagnetism Holmium
Zdroj:	EUROPHYSICS LETTERS. 23(7)
ISSN:	1286-4854 0295-5075
Popis:	The chemical and magnetic structures of a series of Ho/Y superlattices have been studied using X-ray and neutron scattering techniques. The X-ray diffraction results show that the superlattices have a high degree of crystalline order, with sharp interfaces between the two materials. From the neutron scattering the Ho3+ magnetic moments are found to form a basal-plane helic at all temperatures in the ordered phase, with an apparent suppression of the low-temperature cone base. The chirality of the helix is coherently maintained across the yttrium with an effective, temperature-independent turn angle of 51.1(1.5)?. Below ? 30 K the Ho3+ moments form commensurate spin-slip structures.
Databáze:	OpenAIRE
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