<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>Yb</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>Pt</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:mtext>Pb</mml:mtext></mml:mrow></mml:math>: Magnetic frustration in the Shastry-Sutherland lattice

Kim, M. S.; Bennett, Michael; Aronson, M. C.

doi:10.1103/physrevb.77.144425

Cited by 65 publications

(37 citation statements)

References 37 publications

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“…4T for ErB 4 , with a clear step at 1/2M sat . Similar scenario was invoked in Yb 2 Pt 2 Pb [6] which orders AF at T M ≈ 2 K. Within the Mo 2 B 2 Fe type structure there is a large family of compounds with the formula R 2 T 2 X, being T a transition metal and X a p-metal. In this structure, the magnetic atoms 'R' are disposed in a unique crystalline lattice.…”

Section: Introductionmentioning

confidence: 95%

Electron concentration effects on the Shastry-Sutherland phase stability in Ce2−xPd2+yIn<

et al. 2011

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The stability of a Shastry-Sutherland ShSu phase as a function of electron concentration is investigated through the field dependence of thermal and magnetic properties of the solid solution Ce2−xPd2+yIn1−z in the antiferromagnetic branch. In these alloys the electronic (holes) variation is realized by increasing P d concentration. The AF transition TM decreases from 3.5 K to 2.8 K as P d concentration increases from y = 0.2 to y = 0.4. By applying magnetic field, the ShSu phase is suppressed once the field induced ferromagnetic polarization takes over at a critical field Bcr which increases with P d content. A detailed analysis around the critical point reveals a structure in the maximum of the ∂M/∂B derivative, which is related with incipient steps in the magnetization M (B) as predicted by the theory for the ShSu lattice. The crossing of M (B) isotherms, observed in ShSu prototype compounds, is also analyzed. The effect of In substitution by P d is interpreted as an increase of the number of 'holes' in the conduction band and results in a unique parameter able to describe the variation of the magnetic properties along the studied range of concentration.

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Section: Introductionmentioning

confidence: 95%

Electron concentration effects on the Shastry-Sutherland phase stability in Ce2−xPd2+yIn<

et al. 2011

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“…There are presently many other strongly frustrated cerium and ytterbium compounds, like CePdAl [75], Ce 2 Pd 2 Sn [78] or Yb 2 Pt 2 Pb [80]. The present study of the frustration in heavy fermion compounds is a positive feature of the Kondo lattice, because it yields the existence of a second non-magnetic phase which originates from the peculiar situation of the coupling of localized spins on 2 sites along the diagonal bond.…”

Section: Frustration In the Kondo Lattice Modelmentioning

confidence: 99%

Kondo Lattice Models for Rare-Earth and Actinide Systems

Coqblin

2012

Acta Phys. Pol. A

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We present here some works on the strong competition between the Kondo eect, magnetic order and eventually spin glass or frustration eect in anomalous rare-earth and actinide systems. First, we develop an underscreened Kondo lattice model with S f = 1 spins for the 5f -electrons and we have recently improved it by deriving, by the SchrieerWol transformation, a 5f -band with a nite bandwidth. The underscreened Kondo lattice model can account for properties of some uranium and neptunium compounds, like UTe, Np2PdGa3 or UCu2Si2 which have a large Curie temperature Tc of order 100 K and present also a Kondo behavior. In particular, we can account for the observed maximum of Tc under pressure in UTe and the magnetization curves of NpNiSi2 showing the occurrence of the Kondo eect at low temperatures below Tc. Second, we have studied the properties of disordered cerium alloys like CeCuxNi1−x or CeRhxPd1−x by considering the Kondo eect, a ferromagnetic order and a spin glass behavior described by several approaches. The van Hemmen approach gives a good explanation of the properties of cerium alloys and we are describing the magnetic glass clusters which occur in both spin glass and ferromagnetic phases. Third, we present a new description of a frustrated Kondo lattice model, which can account for the behavior under pressure or doping of some ytterbium compounds like Yb2Pd2Sn and YbAgGe.

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“…Yb 2 Pd 2 Sn possesses a tetragonal crystal structure with two types of layers that alternatively stack along c -axis. Another scenario based on the geometrical frustration forming the Shastry-Sutherland lattice 18 has been proposed, beyond the normal framework of competition between the RKKY interaction and the Kondo effect 19 . Still, the precise origin of the two QCPs in Yb 2 Pd 2 Sn is not fully elucidated.…”

Section: Introductionmentioning

confidence: 99%

Pressure-induced anomalous valence crossover in cubic YbCu5-based compounds

Yamaoka

Tsujii

Suzuki

et al. 2017

Sci Rep

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A pressure-induced anomalous valence crossover without structural phase transition is observed in archetypal cubic YbCu5 based heavy Fermion systems. The Yb valence is found to decrease with increasing pressure, indicating a pressure-induced crossover from a localized 4f 13 state to the valence fluctuation regime, which is not expected for Yb systems with conventional c–f hybridization. This result further highlights the remarkable singularity of the valence behavior in compressed YbCu5-based compounds. The intermetallics Yb2Pd2Sn, which shows two quantum critical points (QCP) under pressure and has been proposed as a potential candidate for a reentrant Yb2+ state at high pressure, was also studied for comparison. In this compound, the Yb valence monotonically increases with pressure, disproving a scenario of a reentrant non-magnetic Yb2+ state at the second QCP.

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Yb2Pt2Pb: Magnetic frustration in the Shastry-Sutherland lattice

Cited by 65 publications

References 37 publications

Electron concentration effects on the Shastry-Sutherland phase stability in Ce2−xPd2+yIn<

Electron concentration effects on the Shastry-Sutherland phase stability in Ce2−xPd2+yIn<

Kondo Lattice Models for Rare-Earth and Actinide Systems

Pressure-induced anomalous valence crossover in cubic YbCu5-based compounds

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