Enhanced thermoelectric properties of heavy-fermion compounds 
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Galeano-Cabral, Jorge R.; Karr, Eliana; Schundelmier, Benny; Oladehin, Olatunde; Choi, Eun Sang; Siegrist, T.; Ordóñez, Juan C.; Shastri, S. D.; Petkov, Valeri; Baumbach, Ryan; Wei, Kaya

doi:10.1103/physrevmaterials.7.025406

Cited by 2 publications

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“…The superconductivity has been explored in terms of enhanced T C due to the rattling of the heavier A and B elements within the cages. The rattling of the A and B elements was also the focus for the most recent surge of interest in the AB 2 C 20 compounds: enhanced low-temperature thermoelectricity [15][16][17]. This was first explored in Yb-comprising Zn compounds, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Structural trends and itinerant magnetism of the new cage-structured compound HfMn₂Zn₂₀

Yasmin,

Noor,

Besara

2024

J. Phys.: Condens. Matter

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A new cage-structured compound – HfMn2Zn20 – belonging to the AB 2 C 20 (A, B = transition or rare earth metals, and C = Al, Zn, or Cd) family of structures has been synthesized via the self-flux method. The new compound crystallizes in the space group Fd-3m with lattice parameter a ≈ 14.0543(2) Å (Z = 8) and exhibits non-stoichiometry due to Mn/Zn mixing on the Mn-site and an underoccupied Hf-site. The structure refines to Hf0.93Mn1.63Zn20.37 and follows lattice size trends when compared to other HfM 2Zn20 (M = Fe, Co, and Ni) structures. The magnetic measurements show that this compound displays a modified Curie-Weiss behavior with a transition temperature around 22 K. The magnetization shows no saturation, a small magnetic moment, and near negligible hysteresis, all signs of itinerant magnetism. The Rhodes-Wohlfarth ratio and the spin fluctuation parameters ratio both confirm the itinerant nature of the magnetism in HfMn2Zn20.

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Section: Introductionmentioning

confidence: 99%

“…This was first explored in Yb-comprising Zn compounds, i.e. YbB 2 Zn 20 where B is a transition metal [15,16] but more recently in site-mixed Yb/Ce/Sm [17].…”

Section: Introductionmentioning

confidence: 99%

Structural trends and itinerant magnetism of the new cage-structured compound HfMn₂Zn₂₀

Yasmin,

Noor,

Besara

2024

J. Phys.: Condens. Matter

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Effect of Ni Doping on the Thermoelectric Properties of YbCo2Zn20

Galeano-Cabral,

Schundelmier,

Oladehin

et al. 2024

Materials

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Thermoelectric devices are both solid-state heat pumps and energy generators. Having a reversible process without moving parts is of high importance for applications in remote locations or under extreme conditions. Yet, most thermoelectric devices have a rather limited energy conversion efficiency due to the natural competition between high electrical conductivity and low thermal conductivity, both being essential conditions for achieving a high energy conversion efficiency. Heavy-fermion compounds YbT2Zn20 (T = Co, Rh, Ir) have been reported to be potential candidate materials for thermoelectric applications at low temperatures. Motivated by this result, we applied chemical substitution studies on the transition metal site in order to optimize the charge carrier concentration as well as promote more efficient phonon scatterings. Here, we present the latest investigation on the Ni-doped specimens YbCo2-xNixZn20, where enhanced thermoelectric figure of merit values have been obtained.

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Enhanced thermoelectric properties of heavy-fermion compounds YbxCeySmzIr2Zn20 (

Cited by 2 publications

References 33 publications

Structural trends and itinerant magnetism of the new cage-structured compound HfMn₂Zn₂₀

Structural trends and itinerant magnetism of the new cage-structured compound HfMn₂Zn₂₀

Effect of Ni Doping on the Thermoelectric Properties of YbCo2Zn20

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Enhanced thermoelectric properties of heavy-fermion compounds YbxCeySmzIr2Zn20 (

Cited by 2 publications

References 33 publications

Structural trends and itinerant magnetism of the new cage-structured compound HfMn2Zn20

Structural trends and itinerant magnetism of the new cage-structured compound HfMn2Zn20

Effect of Ni Doping on the Thermoelectric Properties of YbCo2Zn20

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Product

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Structural trends and itinerant magnetism of the new cage-structured compound HfMn₂Zn₂₀

Structural trends and itinerant magnetism of the new cage-structured compound HfMn₂Zn₂₀