Heavy-Fermion Behavior in a Honeycomb Kondo Lattice CePt<sub>6</sub>Al<sub>3</sub>

Oishi, Ryohei; Ohmagari, Yudai; Kusanose, Yuka; Yu, You‐Jun; Umeo, Kazunori; Shimura, Yasuyuki; Onimaru, Takahiro; Takabatake, Toshiro

doi:10.7566/jpsj.89.104705

Cited by 10 publications

(3 citation statements)

References 28 publications

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“…35 According to Vejpravová et al (2006), 36 CePt 3 Al forms a distorted CePt 3 B-type structure; 37 the compound exhibits magnetic ordering at T = 1.9 K. The REPt 6 Al 3 series (space group R3 ˉc, RE = Ce-Nd, Sm, Gd, Tb) 38 has been observed to exist for both large and small lanthanoids; the ground state in the cerium compound has been characterized as a heavy fermion from magnetic, transport, and specific-heat measurements of a single-phase crystalline sample. 39 REPt 5 Al 2 (RE = Y, Gd-Tm, Lu) is another Pt-rich composition, known for smaller rare earths; these compounds crystallize in the ZrNi 2 Al 5 type with an anti-arrangement of the Pt and Al atoms. 40 Continuing our studies on RE(T′)-T-X systems (X = B, Al) 17,37,[41][42][43] we turned our attention to the platinum rich corner of ternary rare earth aluminide systems because of the large number of missing members within the existing RE-Pt-Al isostructural series.…”

Section: Introductionmentioning

confidence: 99%

Electronic and structural properties of Y₆Pt₁₃X₄, site occupancy variants of the Ba₆Na₁₆N subnitride (X = Al, Ga)

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Electronic and structural properties of Y₆Pt₁₃X₄, site occupancy variants of the Ba₆Na₁₆N subnitride (X = Al, Ga)

et al. 2023

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“…The cerium atoms in CePt6Al3 are arranged on a honeycomb lattice [1] which is expected to host magnetic frustration [2]. At low temperatures, a paramagnetic heavy-fermion state is realized, as manifested by the specific heat divided by temperature C/T of 0.5 J/K 2 mol at 0.5 K [3]. Thereby, the Kondo effect and the magnetic frustration likely work cooperatively.…”

Section: Introductionmentioning

confidence: 99%

High-field magnetization and magnetoresistance of the honeycomb Kondo lattice alloys Ce(Pt_1-xPd_x)₆Al₃

Oishi

Miyake

Tokunaga

et al. 2022

J. Phys.: Conf. Ser.

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CePt6Al3 is a rare example of the Ce-based honeycomb lattice compound. Substitution of the isovalent Pt for Pd transforms the ground state from a paramagnetic heavy-fermion state to an antiferromagnetic (AFM) ordered state. To gain insight into the role of magnetic frustration in the honeycomb Kondo lattice, we have measured the magnetization M(B) and electrical resistivity ρ(B) of Ce(Pt1-x Pd x )6Al3 (x ≤ 0.3) in pulsed magnetic fields up to 60 T. For the single crystal with x = 0, M(B) for B along the easy c axis exhibits a metamagnetic increase and ρ(B || c) bends at Bm = 28 T. Taking the temperature at a shoulder in the magnetic susceptibility χ (ल) for B ‖ c as T χm = 17 K, the ratio μB B m/K B T >χm is estimated to be 1.1. This value agrees with those reported for Ce-based paramagnetic heavy-fermion compounds with similar magnitudes of B m. With increasing x from 0 to 0.3 in polycrystalline samples, the magnitude of M(B = 60 T) at 1.4 K increases from 0.75 to 2.0 μβ/Ce, indicating the recovery of localized 4f moments by the Pd substitution for Pt. Using the data of M(B) and ρ(B) for x = 0.1, 0.2, 0.3, we constructed B-T phase diagrams, which show a trend from a small moment AFM ordered state for x = 0.1 to a large moment AFM ordered state for x = 0.3.

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“…In rare-earth-based intermetallic compounds with frustrated lattices, the long-range nature of the RKKY interaction has been believed to overcome the effect of frustration. However, the interplay among frustrated anisotropic exchange interactions, crystalline electric field (CEF) anisotropy, and Kondo effect arises the partial disordered magnetic state, multiple-phase transition, and unusual heavy-fermion state in Ce-and Yb compounds with the quasikagome lattices, CePdAl [9], CeRhSn [10,11], CeIrSn [12], and YbAgGe [13] as well as that with the honeycomb lattice CePt 6 Al 3 [14]. For example, in CePdAl below T N = 2.7 K, one-third of Ce ions remain in a paramagnetic state due to the geometrical frustration of the quasikagome lattice [9].…”

Section: Introductionmentioning

confidence: 99%

Uniaxial-Pressure-Induced Release of Magnetic Frustration in a Triangular Lattice Antiferromagnet YbCuGe

Umeo

Watanabe

Araki

et al. 2020

Metals

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We have studied the effect of geometrical frustration on the antiferromagnetic order in the Yb-based triangular lattice compound YbCuGe below TN = 4.2 K by the measurements of magnetization and specific heat under hydrostatic and uniaxial pressures. By applying hydrostatic pressure P up to 1.34 GPa, TN hardly changes. By contrast, TN increases as P is applied along the hexagonal a axis, while TN decreases by the application of P along the c axis. The increase of TN only for P‖a suggests the release of the frustration inherent in the triangular lattice of Yb ions of this compound.

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Heavy-Fermion Behavior in a Honeycomb Kondo Lattice CePt₆Al₃

Cited by 10 publications

References 28 publications

Electronic and structural properties of Y₆Pt₁₃X₄, site occupancy variants of the Ba₆Na₁₆N subnitride (X = Al, Ga)

Electronic and structural properties of Y₆Pt₁₃X₄, site occupancy variants of the Ba₆Na₁₆N subnitride (X = Al, Ga)

High-field magnetization and magnetoresistance of the honeycomb Kondo lattice alloys Ce(Pt_1-xPd_x)₆Al₃

Uniaxial-Pressure-Induced Release of Magnetic Frustration in a Triangular Lattice Antiferromagnet YbCuGe

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Heavy-Fermion Behavior in a Honeycomb Kondo Lattice CePt6Al3

Cited by 10 publications

References 28 publications

Electronic and structural properties of Y6Pt13X4, site occupancy variants of the Ba6Na16N subnitride (X = Al, Ga)

Electronic and structural properties of Y6Pt13X4, site occupancy variants of the Ba6Na16N subnitride (X = Al, Ga)

High-field magnetization and magnetoresistance of the honeycomb Kondo lattice alloys Ce(Pt1-x Pd x )6Al3

Uniaxial-Pressure-Induced Release of Magnetic Frustration in a Triangular Lattice Antiferromagnet YbCuGe

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Heavy-Fermion Behavior in a Honeycomb Kondo Lattice CePt₆Al₃

Electronic and structural properties of Y₆Pt₁₃X₄, site occupancy variants of the Ba₆Na₁₆N subnitride (X = Al, Ga)

Electronic and structural properties of Y₆Pt₁₃X₄, site occupancy variants of the Ba₆Na₁₆N subnitride (X = Al, Ga)

High-field magnetization and magnetoresistance of the honeycomb Kondo lattice alloys Ce(Pt_1-xPd_x)₆Al₃