2016
DOI: 10.1103/physrevlett.116.157201
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Magnetic Ground States of the Rare-Earth Tripod Kagome LatticeMg2RE3Sb3

Abstract: We present the structural and magnetic properties of a new compound family, Mg2RE3Sb3O14 (RE = Gd, Dy, Er), with a hitherto unstudied frustrating lattice, the "tripod kagome" structure. Susceptibility (ac, dc) and specific heat exhibit features that are understood within a simple Luttinger-Tisza type theory. For RE = Gd, we found long ranged order (LRO) at 1.65 K, which is consistent with a 120• structure, demonstrating the importance of diople interactions for this 2D Heisenberg system. For RE = Dy, LRO at 0.… Show more

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Cited by 74 publications
(80 citation statements)
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“…Because the CEF Hamiltonian does not include the effect of exchange coupling between Ho moments, which is of similar size to the separation between the lower CEF levels, it may not fully account for the anisotropy of the moments, especially at low temperatures. Dy3Mg2Sb3O14 (22,23) where they are comparable. This is likely a result of the relatively strong RKKY-type interaction between Ho moments (27).…”
Section: Inelastic Neutron Scattering and Cef Analysismentioning
confidence: 81%
“…Because the CEF Hamiltonian does not include the effect of exchange coupling between Ho moments, which is of similar size to the separation between the lower CEF levels, it may not fully account for the anisotropy of the moments, especially at low temperatures. Dy3Mg2Sb3O14 (22,23) where they are comparable. This is likely a result of the relatively strong RKKY-type interaction between Ho moments (27).…”
Section: Inelastic Neutron Scattering and Cef Analysismentioning
confidence: 81%
“…20) is an ideal candidate for an ECO state. The material crystallizes in a variant of the pyrochlore structure (space group R m 20) in which kagome planes of magnetic Dy 3+ alternate with triangular layers of non-magnetic Mg 2+ (Fig. 1c).…”
Section: Resultsmentioning
confidence: 99%
“…1d) yield a Curie-Weiss constant θ CW =−0.1(2) K for fitting range 5≤ T ≤50 K, consistent with ref. 20 (however, the value depends strongly on fitting range). Demagnetization effects may also be significant—increasing θ CW by 1.4 K in spin-ice materials21—but cannot be quantitatively determined for a powder sample.…”
Section: Resultsmentioning
confidence: 99%
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