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ON THE MAGNETIC PHASE-DIAGRAM OF ERBIUM IN A C-AXIS MAGNETIC-FIELD
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UNSPECIFIED (1992) ON THE MAGNETIC PHASE-DIAGRAM OF ERBIUM IN A C-AXIS MAGNETIC-FIELD. JOURNAL OF PHYSICS-CONDENSED MATTER, 4 (44). pp. 8599-8608. ISSN 0953-8984.
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Abstract
The magnetic phase diagram of erbium with a magnetic field applied along the hexagonal c axis has been investigated using high-resolution neutron diffraction. We find that there are three distinct ordered phases occupying different regions of the field-temperature plane: a cone phase is found at high fields (B greater-than-or-equal-to 2 T) which has an incommensurate structure at temperatures above 40 K, but which becomes commensurate on cooling, first with a wavevector of q(m) = 1/4c* and then with q(m) = 5/21c*; a nearly cycloidal structure in fields below 2 T, with a wavevector which passes through a series of commensurate values, with those structures having a net c axis moment being particularly favoured; and a phase at temperatures above 60 K which is mostly longitudinally modulated, but which also has a smaller basal plane component with a different wavevector. Our results are discussed with reference to a recent study of the zero-field structure of erbium by Cowley and Jensen, where it was proposed that the equivalence of the two magnetic sublattices in the chemical hexagonal unit cell is broken by an interaction with trigonal symmetry.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | JOURNAL OF PHYSICS-CONDENSED MATTER | ||||
Publisher: | IOP PUBLISHING LTD | ||||
ISSN: | 0953-8984 | ||||
Official Date: | 2 November 1992 | ||||
Dates: |
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Volume: | 4 | ||||
Number: | 44 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 8599-8608 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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