Pressure Evolution of Characteristic Electronic States in EuRh2Si2and EuNi2Ge2

Honda, Fuminori; Okauchi, Keigo; Nakamura, Ai; Aoki, Dai; Akamine, Hikaru; Ashitomi, Yousuke; Hedo, Masato; Nakama, Takao; Ōnuki, Yoshichika

doi:10.1088/1742-6596/807/2/022004

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…2. The results are consistent with the references [1,2]. Below 0.9 GPa, ρ exhibits a kink at around 25 K corresponding to the AF magnetic transition.…”

Section: Resultssupporting

confidence: 92%

“…In Eu-based compounds, valence instability of Eu ion, due to the close energy levels between Eu 2+ and Eu 3+ states, induces the variety of physical properties. The instability notably appears as the pressure-induced valence-transition in EuRh 2 Si 2 , EuNi 2 Ge 2 and EuCo 2 Ge 2 [1][2][3][4]. At ambient pressure, magnetic Eu 2+ state (4f 7 , J = 7/2) is stable and the materials undergo an antiferro (AF) magnetic state at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Conductivity and Specific Heat of EuRh₂Si₂ under Pressure

Nishigori

Yamamoto

2020

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

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We have measured the absolute values of thermal conductivity κ and specific heat C of EuRh 2 Si 2 under pressure by newly developed three-dimensional thermal-relaxation method. Below a critical pressure P V ≃ 0.9 GPa, a clear peak corresponding to an antiferro-magnetic transition is observed almost independent of pressure, although no anomaly is detected in κ. Above P V , κ exhibits change of slope at the valence transition temperature T V , and enhancement of κ is observed below T V. The magnitude of the enhancement is increased with increasing pressure suggesting that the valence change of Eu ion associated with the valence transition is enlarged by pressure.

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“…2. The results are consistent with the references [1,2]. Below 0.9 GPa, ρ exhibits a kink at around 25 K corresponding to the AF magnetic transition.…”

Section: Resultssupporting

confidence: 92%