Random fields and the partially paramagnetic state of CsCo0.83Mg0.17Br3 : critical scattering study

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.92.077202
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TypeArticle
Journal titlePhysical Review Letters
Volume92
Issue7
Pages077202-1077202-4; # of pages: 4
AbstractWe have performed measurements of the critical neutron scattering on CsCo0.83Mg0.17Br3, a dilute stacked triangular lattice (STL) Ising antiferromagnet (AF). A two component line shape associated with the critical fluctuations appears at a temperature coincident with TN1 observed in pure CsCoBr3. Such scattering is indicative of fluctuations in prototypical random field Ising model (RFIM) systems. The random field domain state arises in this case due to geometrical frustration within the STL Ising AF, which gives rise to a three sublattice Néel state, in which one sublattice is disordered. Magnetic vacancies nucleate AF domains in which the vacancies reside on the disordered sublattice thereby generating a RFIM state in the absence of an applied magnetic field.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Canadian Neutron Beam Centre
Peer reviewedNo
NPARC number12338219
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Record identifier9ccc2ba3-1819-452f-8ea4-fc117e907949
Record created2009-09-10
Record modified2016-05-09
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