Magnetic properties of the Ag–In–rare-earth 1/1 approximants

We have performed magnetic susceptibility and neutron scattering measurements on polycrystalline Ag-In-RE (RE, rare-earth) 1/1 approximants. In the magnetic susceptibility measurements, for most of the RE elements, inverse susceptibility shows linear behaviour in a wide temperature range, confirming...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2011-02, Vol.23 (5), p.056001-056001
Main Authors: Ibuka, Soshi, Iida, Kazuki, Sato, Taku J
Format: Article
Language:English
Subjects:
Approximants
Condensed matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Freezing
Magnetic permeability
Magnetic properties and materials
Magnetic susceptibility
Neutron scattering
Physics
Rare earth metals
Silver
Studies of specific magnetic materials
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Summary:We have performed magnetic susceptibility and neutron scattering measurements on polycrystalline Ag-In-RE (RE, rare-earth) 1/1 approximants. In the magnetic susceptibility measurements, for most of the RE elements, inverse susceptibility shows linear behaviour in a wide temperature range, confirming well localized isotropic moments for the RE(3 + ) ions. Exceptionally for the light RE elements, such as Ce and Pr, nonlinear behaviour was observed, possibly due to significant crystalline field splitting or valence fluctuation. For RE = Tb, the susceptibility measurement clearly shows a bifurcation of the field-cooled and zero-field-cooled susceptibility at T(f) = 3.7 K, suggesting a spin-glass-like freezing. On the other hand, neutron scattering measurements detect significant development of short-range antiferromagnetic spin correlations in the elastic channel, which is accompanied by a broad peak at [Formula: see text] meV in the inelastic scattering spectrum. These features have striking similarity to those in the Zn-Mg-Tb quasicrystals, suggesting that the short-range spin freezing behaviour is due to local high-symmetry clusters commonly seen in both systems.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/23/5/056001