Transport and magnetic properties of new heavy-fermion antiferromagnet YbNi<sub>3</sub>Al<sub>9</sub>

Ohara, Shuichi; Yamashita, Tetsuro; Mori, Yojiro; Sakamoto, Isao

doi:10.1088/1742-6596/273/1/012048

Cited by 37 publications

(36 citation statements)

References 3 publications

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“…The analysis of this model has revealed characteristic magnetization curves, which have been observed in experiments on CrNb 3 S 6 [9,10,[20][21][22] and YbNi 3 Al 9 [13][14][15]. Temperature effect of the spin moment has been included phenomenologically [5,16] and magnetization, entropy and specific heat have been discussed.…”

Section: Introductionmentioning

confidence: 85%

“…With this result, CrNb 3 S 6 is recognized as one * Electronic address: shinozaki@vortex.c.u-tokyo.ac.jp of the candidates of new magnetic devices [12]. In addition to CrNb 3 S 6 , YbNi 3 Al 9 was also discovered as another mono-axial chiral helimagnet with heavy-electron behavior, where the periodicity of the helix is comparable to lattice constant [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Finite-Temperature Properties of Three-Dimensional Chiral Helimagnets

et al. 2016

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We study a three-dimensional (3d) classical chiral helimagnet at finite temperatures through analysis of a spin Hamiltonian, which is defined on a simple cubic lattice and consists of Heisenberg exchange, mono-axial Dzyaloshinskii-Moriya interactions and Zeeman energy due to magnetic field applied in the plane perpendicular to the helical axis. We take account of quasi-two-dimensionality of a known mono-axial chiral helimagnet CrNb3S6 and we adopt three methods: (i) a conventional mean-field (MF) analysis which we call 3dMF method, (ii) a hybrid method called 2dMC-1dMF, which is composed of a classical Monte Carlo (MC) simulation and MF approximation applied respectively to the intra-and inter-plane interactions, and (iii) a simple-MC simulation (3dMC) at zero field. Temperature dependence of magnetization calculated by the 3dMF method shows a cusp-like structure similar to that observed in experiments. In the absence of magnetic field, both 2dMC-1dMF and 3dMC yield close values of transition temperature. The 2dMC-1dMF provides a quantitative description of thermodynamic properties even under external field at an accessible numerical cost.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Finite-Temperature Properties of Three-Dimensional Chiral Helimagnets

et al. 2016

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“…We see that the Yb ion tends to favor the trivalent state with increasing the Al concentration as a whole. This result indicates that the c − f hybridization gradually decreases, leading to the Yb valence of nearly 3 in YbNi 3 Al 9 [5,6,8].…”

Section: Resultsmentioning

confidence: 89%

“…Clean surfaces of the samples were obtained by fracturing in situ. Single crystals of YbNi 3 (Ga 1−x Al x ) 9 with x = 0, 0.05, 0.10 and 0.15 were synthesized by self-flux method as described in the literatures [5,6]. The x-values presented here are nominal ones derived from a mixture ratio of starting materials.…”

Section: Methodsmentioning

confidence: 99%

“…YbNi 3 Al 9 is a heavy-fermion antiferromagnet with the Néel temperature of T N =3.4 K, while YbNi 3 Ga 9 is a valence fluctuating compound with non-magnetic state, as evidenced by the magnetic susceptibility measurements [5][6][7]. YbNi 3 Al 9 and YbNi 3 Ga 9 are, thus, located at the opposite sides of the quantum critical point (QCP) in the Doniach phase diagram.…”

Section: Introductionmentioning

confidence: 99%

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Photoemission Studies of Kondo Lattice Compounds YbNi₃(Ga₁₋_xAl_x)₉

Utsumi

Sato

Nagata

et al. 2014

Proceedings of the 12th Asia Pacific Physics Conference (APPC12)

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We have investigated the electronic structure of YbNi 3 (Ga 1−x Al x ) 9 (x=0, 0.05, 0.10, 0.15) by means of hard x-ray (hν ∼ 6 keV) and low energy (hν ∼ 7 eV) photoemission spectroscopies (HAXPES and LEPES). Both Yb 2+ and Yb 3+ components are observed in the Yb 3d HAXPES spectra, which is an evidence of the valence fluctuation in YbNi 3 (Ga 1−x Al x ) 9 . A substitution of an Al ion for a Ga ion in YbNi 3 Ga 9 changes the Yb ion into a trivalent state. The LEPES spectra of YbNi 3 Ga 9 clearly exhibit the Kondo peak near the Fermi level (E F ) and the Kondo temperature is estimated to be T K ∼ 550 K. With the Al substitution, the Kondo peak is shifted toward E F , indicating the decrease of T K

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Chemical effects of high‐resolution YbLγ₄ emission spectra: a possible probe for chemical analysis

et al. 2013

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Ga 9 with a resolution of~0.9 eV. Peak splitting of the YbLg 4 line was observed in all the recorded spectra and was attributed to the two components originating from the LS coupling of the Yb5p hole, the 0 spectra of the mixed valence intermetallics, i.e. YbNi 3 Ga 9 (v = 2.59) and b-YbAlB 4 (v = 2.75), were fairly well reproduced by averaging the spectra of divalent Yb and trivalent YbNi 3 Al 9 , which suggests the possibility of using the YbLg 4 emission for determining the valence of Yb intermetallics. In trivalent Yb compounds, the relative intensity of Lg 4 compared with that of Lg 4 0 , as well as the appearance of a high-energy satellite, was found to be influenced by the ligands around the Yb ions. With the aid of preliminary atomic multiplet and band structure calculations, the differences in the valence band structure and resultant screening effects on the O II,III À1 states were determined to be the possible causes for the observed ligand dependence.

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Transport and magnetic properties of new heavy-fermion antiferromagnet YbNi₃Al₉

Cited by 37 publications

References 3 publications

Finite-Temperature Properties of Three-Dimensional Chiral Helimagnets

Finite-Temperature Properties of Three-Dimensional Chiral Helimagnets

Photoemission Studies of Kondo Lattice Compounds YbNi₃(Ga₁₋_xAl_x)₉

Chemical effects of high‐resolution YbLγ₄ emission spectra: a possible probe for chemical analysis

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Transport and magnetic properties of new heavy-fermion antiferromagnet YbNi3Al9

Cited by 37 publications

References 3 publications

Finite-Temperature Properties of Three-Dimensional Chiral Helimagnets

Finite-Temperature Properties of Three-Dimensional Chiral Helimagnets

Photoemission Studies of Kondo Lattice Compounds YbNi3(Ga1−xAlx)9

Chemical effects of high‐resolution YbLγ4 emission spectra: a possible probe for chemical analysis

Contact Info

Product

Resources

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Transport and magnetic properties of new heavy-fermion antiferromagnet YbNi₃Al₉

Photoemission Studies of Kondo Lattice Compounds YbNi₃(Ga₁₋_xAl_x)₉

Chemical effects of high‐resolution YbLγ₄ emission spectra: a possible probe for chemical analysis