Low Curie temperature ferromagnetic phase in 
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 possibly accompanied by strong quantum fluctuations

Yamada, Akira; Oike, Shota; Higashinaka, Ryuji; Matsuda, Tatsuma D.; Aoki, Yuji

doi:10.1103/physrevb.96.085102

Cited by 4 publications

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References 47 publications

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“…Figure 4 (a) shows the temperature dependence of χ for La2xEuxO2Bi3Ag0.6Sn0.4S6 (x = 0.1-0.6) under a magnetic field, B = 1 T, for temperatures in the range 300 to 2 K. All the Eu-doped samples show the Curie-Weiss behavior. We analyzed the χ-T data between 5 and 70 K using the Curie-Weiss law [30]. The log-log plot for the (χ-χ0) -1 vs T in Fig.…”

Section: Methodsmentioning

confidence: 99%

Improvement of superconducting properties by chemical pressure effect in Eu-doped La2-Eu O2Bi3Ag0.6Sn0.4S6

Jha

Goto

Higashinaka

et al. 2020

Physica C: Superconductivity and its Applications

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Section: Methodsmentioning

confidence: 99%

Improvement of superconducting properties by chemical pressure effect in Eu-doped La2-Eu O2Bi3Ag0.6Sn0.4S6

Jha

Goto

Higashinaka

et al. 2020

Physica C: Superconductivity and its Applications

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Elastic properties of SmPt2Cd20 probed by ultrasound measurements

Nakanishi

Nakamura

et al. 2018

AIP Advances

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Ultrasound measurements have been carried out to investigate the elastic and low-temperature 4f-electronic properties of the Sm-based 1-2-20 system SmPt2Cd20. It was found that SmPt2Cd20 shows a pronounced elastic softening toward the magnetic transition temperature Tc = 0.64 K in the temperature dependence of the transverse elastic constant CE = (C11 -C12)/2. The clear elastic softening behavior is suppressed gradually with increasing a magnetic field. The obtained results can be explained reasonably by a deformation potential approximation in which a coupling between conduction electrons and elastic strains caused by sound waves leads to a temperature dependence of elastic constants. This suggests possibly that the 4f electrons would become itinerant in the ground state in SmPt2Cd20. The nature of the low-temperature elastic and electronic states involving the ground state multiplets of Sm ions are discussed.

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Relationship between specific heat, valence and effective magnetic moment of Sm ions in strongly correlated Sm compounds

et al. 2018

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Strongly-correlated electron states emerging in cubic Sm-based compounds, e.g., SmOs4Sb12 and Sm Tr2Al20 (Tr: transition metal elements), have anomalous characteristics, like magnetic-field-insensitive heavy-fermion behaviors and strongly mixed valence of Sm ions. In this paper, we compare key physical parameters of these compounds. The results reveal the existence of the following novel features: (i) the electronic specific heat coefficient γ shows a significant inverse correlation with the effective magnetic moment μeff (γ∼1/μeff2), and (ii) largely enhanced γ appears in intermediate Sm valance states around ∼ +2.8. Other remarkable features are the absence of enhanced Pauli paramagnetism at low temperatures and largely suppressed μeff (down to ∼0.1 μB). These are quite different from those of Ce-based heavy-fermion compounds, pointing to an unconventional mechanism for the formation of Sm-based heavy quasiparticles, possibly caused by complex hybridization processes associated with multi-4 f-electrons of a Sm ion.

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Low Curie temperature ferromagnetic phase in SmPt2Cd20 possibly accompanied by strong quantum fluctuations

Abstract: Electrical resistivity, magnetization and specific heat have been measured for single crystals of

Cited by 4 publications

References 47 publications

Improvement of superconducting properties by chemical pressure effect in Eu-doped La2-Eu O2Bi3Ag0.6Sn0.4S6

Improvement of superconducting properties by chemical pressure effect in Eu-doped La2-Eu O2Bi3Ag0.6Sn0.4S6

Elastic properties of SmPt2Cd20 probed by ultrasound measurements

Relationship between specific heat, valence and effective magnetic moment of Sm ions in strongly correlated Sm compounds

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