Magnetic and electrical properties of filled skutterudite compound (Sm1−xRx)Ru4P12(R=La, Y)

Sekine, Chihiro; Kiyota, Yuya; Kawamura, Yukihiro; Yagi, T.

doi:10.1088/1742-6596/391/1/012061

Cited by 7 publications

(5 citation statements)

References 14 publications

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“…Fig. 2 shows the lattice constant of Sm(Ru 1-x Rh x ) 4 P 12 determined by X-ray analysis together with those previously reported for (Sm 1-x La x )Ru 4 P 12 [22]. The lattice constant of (Sm 1-x La x )Ru 4 P 12 increases linearly with x because the ionic radius of La is larger than that of Sm.…”

Section: Resultsmentioning

confidence: 60%

“…5 shows the dependence of T MI on x for (Sm 1-x La x )Ru 4 P 12 and Sm(Ru 1-x Rh x ) 4 P 12 . The effect of substitution in the Rh-doped system was more significant than that for the La-doped system [22]. The reason for the significant change is considered to be that Rh substitution directly modifies the Fermi surface.…”

Section: Resultsmentioning

confidence: 88%

“…The M-I transition was also suppressed by a small amount of Ru-site substitution in PrRu 4 P 12 [23]. The mechanism of the M-I [22] as a function of x.…”

Section: Resultsmentioning

confidence: 93%

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Rh Substitution Effect on Filled Skutterudite SmRu₄P₁₂

Sekine

Hayashi

Saravanan

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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The compound SmRu 4 P 12 , crystallizing in the filled skutterudite-type structure, has attracted much interest because it exhibits a metal-insulator (M-I) transition associated with unconventional antiferromagnetic ordering of the 4f electrons in Sm ions at 16.5 K. Extensive experimental and theoretical studies suggest the M-I transition is due to the occurrence of both magnetic and charge interactions, i.e., the coupling between the multipole moment and the dipole moment. However, the properties of the ordered states and the detailed mechanism of the M-I transition remain unclear. We have studied the effect of Ru-site substitution on SmRu 4 P 12 using electrical resistivity and magnetic susceptibility measurements to elucidate the origin of the M-I transition. Single-phase polycrystalline Sm(Ru 1-x Rh x) 4 P 12 was prepared at high temperature and high pressure. The M-I transition was extremely sensitive to a small amount of Rh substitution, which strongly supports that the instability of Fermi surface nesting plays a fundamental role in the M-I transition of SmRu 4 P 12 .

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Section: Resultsmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 88%

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Rh Substitution Effect on Filled Skutterudite SmRu₄P₁₂

Sekine

Hayashi

Saravanan

et al. 2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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“…It is very different from the case of PrRu 4 P 12 , where the couplings have the opposite sign and |J c | |J s |. The AF magnetic coupling must be the origin of the features of the Kondo effect in this material, [21] which is absent in PrRu 4 P 12 .…”

Section: Effective Hamiltonianmentioning

confidence: 65%

“…[1][2][3][4][5][6][7] A similar but distinct MI transition is known to emerge in SmRu 4 P 12 at 17K, below which an antiferromagnetic (AFM) order of Sm 4f electrons has been observed. [8][9][10][11][12][13][14][15][16][17][18][19][20][21] Anomalous properties of this transition particularly show up in a magnetic field. The field enhances the transition temperature in spite of AFM ordering, whereas an additional distinct anomaly in thermodynamics has been detected in the AFM phase under the fields, suggesting the emergence of a second phase.…”

Section: Introductionmentioning

confidence: 99%

p–f Mixing, Competing Interactions, and Unconventional Magnetism in SmRu₄P₁₂

Shiina¹

2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

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The origin of an unconventional magnetic order in skutterudite SmRu 4 P 12 is studied theoretically by considering the features of the Sm 4f state. It is found that the p-f mixing specific to this system results in competing charge and magnetic interactions between conduction and f electrons. Anomalous magnetic field and temperature dependences of several quantities observed in the ordered phase of this material are shown to be reproduced well by these interactions.

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