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Title: Field dependence of the magnetic structure of TbMn{sub 2}O{sub 5}

The evolution of the magnetic propagation vector of the magnetically ordered phases of TbMn{sub 2}O{sub 5} has been studied as a function of magnetic field applied parallel to both [010] and [100] axes. The results have been used to construct (H, T) phase diagrams showing the regions of stability of the three distinct phases IC1, C, and IC2 known to exist in zero field. Application of magnetic field along [010] increases the stability range of the commensurate C phase at the expense of the two incommensurate phases IC1 and IC2, whereas applying the field along [100] has the opposite effect. The evolution with field of the magnetic structure of the C phase has been determined from the integrated intensities of sets of magnetic reflections measured with different field values. With the field along [010], there are no significant changes in structure in fields up to 6 T. Applying the field parallel to [100] leads to an apparently continuous increase in the z component of the propagation vector from 0.25 in zero field to ≈0.3 in 6 T. This change is accompanied by increasing ferromagnetic polarisation of the Tb sublattices. Polarised neutron measurements made on the fundamental reflections show that there is nomore » significant ferromagnetic polarisation of any the Mn sublattices in fields of up to 6 T.« less
Authors:
;  [1]
  1. Institut Laue Langevin, BP 156, 38042 Grenoble (France)
Publication Date:
OSTI Identifier:
22402696
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MAGNETIC FIELDS; NEUTRONS; PHASE DIAGRAMS; POLARIZATION; REFLECTION; STABILITY