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Title: On the magnetic order of Gd{sub 5}Ge{sub 3}

We have investigated the magnetic structure of Gd{sub 5}Ge{sub 3} by neutron powder diffraction down to 3.6 K. This compound presents three events in the heat capacity which we show are related to fundamental changes in the magnetic order. The primary antiferromagnetic ordering occurs at 82(2) K and produces a magnetic cell that is tripled with respect to the underlying orthorhombic crystal cell. The propagation vector is k{sub 1}=[0 0 1/3 ]. At 74(2) K, the magnetic order becomes “anti-C” with a propagation vector k{sub 2} = [1 0 0]. A third change in the magnetic order occurs at 40(2) K, and the new magnetic structure is essentially the “anti-C” structure but with the addition of a tripled magnetic component corresponding to a propagation vector k{sub 3} = [1/3  0 0].
Authors:
 [1] ;  [2] ; ; ;  [3]
  1. School of Physical, Environmental and Mathematical Sciences, UNSW Canberra at the Australian Defence Force Academy, Canberra, ACT BC 2610 (Australia)
  2. Physics Department and Centre for the Physics of Materials, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8 (Canada)
  3. Ames Laboratory of the U.S. Department of Energy, Iowa State University, Ames, Iowa 50011-3020, USA and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011-2300 (United States)
Publication Date:
OSTI Identifier:
22273597
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; CRYSTALS; GADOLINIUM COMPOUNDS; GERMANIDES; NEUTRON DIFFRACTION; ORTHORHOMBIC LATTICES; SPECIFIC HEAT; TEMPERATURE DEPENDENCE; VECTORS