Divalent, trivalent, and heavy fermion states in Eu compounds

Y. Ōnuki; A. Nakamura; F. Honda; D. Aoki; T. Tekeuchi; M. Nakashima; Y. Amako; H. Harima; K. Matsubayashi; Y. Uwatoko; S. Kayama; T. Kagayama; K. Shimizu; S. Esakki Muthu; D. Braithwaite; B. Salce; H. Shiba; T. Yara; Y. Ashitomi; H. Akamine; K. Tomori; M. Hedo; T. Nakama

doi:10.1080/14786435.2016.1218081

Divalent, trivalent, and heavy fermion states in Eu compounds

Y. Ōnuki, A. Nakamura, F. Honda, D. Aoki, T. Tekeuchi, M. Nakashima, Y. Amako, H. Harima, K. Matsubayashi, Y. Uwatoko, S. Kayama, T. Kagayama, K. Shimizu, S. Esakki Muthu, D. Braithwaite, B. Salce, H. Shiba, T. Yara, Y. Ashitomi, H. AkamineK. Tomori, M. Hedo, T. Nakama

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Most of the Eu compounds are in the divalent (Eu²⁺) electronic state and order magnetically. On the other hand, the Eu-trivalent (Eu³⁺) compounds exist but are small in number. An energy difference between the Eu²⁺ and Eu³⁺ states is, however, not extremely large. Therefore, the valence transition occurs in some Eu compounds. We present the characteristic properties of the Eu compounds from several viewpoints: a canting magnetisation in the Eu²⁺-antiferromagnets, the Fermi surface property in the Eu³⁺-compounds of EuPd₃ and EuCo₂ Si₂, the heavy fermion state in EuNi₂ P₂, the temperature-induced valence transition in EuPd₂ Si₂, the pressure-induced valence transition in EuRh₂ Si₂ and EuRu₂ P₂, and the heavy fermion state approaching to the quantum critical point with increasing pressure in Eu₂ Ni₃ Ge₅.

Original language	English
Pages (from-to)	3399-3414
Number of pages	16
Journal	Philosophical Magazine
Volume	97
Issue number	36
DOIs	https://doi.org/10.1080/14786435.2016.1218081
Publication status	Published - Dec 22 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1080/14786435.2016.1218081

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Ōnuki, Y., Nakamura, A., Honda, F., Aoki, D., Tekeuchi, T., Nakashima, M., Amako, Y., Harima, H., Matsubayashi, K., Uwatoko, Y., Kayama, S., Kagayama, T., Shimizu, K., Esakki Muthu, S., Braithwaite, D., Salce, B., Shiba, H., Yara, T., Ashitomi, Y., ... Nakama, T. (2017). Divalent, trivalent, and heavy fermion states in Eu compounds. Philosophical Magazine, 97(36), 3399-3414. https://doi.org/10.1080/14786435.2016.1218081

Ōnuki, Y, Nakamura, A, Honda, F, Aoki, D, Tekeuchi, T, Nakashima, M, Amako, Y, Harima, H, Matsubayashi, K, Uwatoko, Y, Kayama, S, Kagayama, T, Shimizu, K, Esakki Muthu, S, Braithwaite, D, Salce, B, Shiba, H, Yara, T, Ashitomi, Y, Akamine, H, Tomori, K, Hedo, M & Nakama, T 2017, 'Divalent, trivalent, and heavy fermion states in Eu compounds', Philosophical Magazine, vol. 97, no. 36, pp. 3399-3414. https://doi.org/10.1080/14786435.2016.1218081

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abstract = "Most of the Eu compounds are in the divalent (Eu2+) electronic state and order magnetically. On the other hand, the Eu-trivalent (Eu3+) compounds exist but are small in number. An energy difference between the Eu2+ and Eu3+ states is, however, not extremely large. Therefore, the valence transition occurs in some Eu compounds. We present the characteristic properties of the Eu compounds from several viewpoints: a canting magnetisation in the Eu2+-antiferromagnets, the Fermi surface property in the Eu3+-compounds of EuPd3 and EuCo2 Si2, the heavy fermion state in EuNi2 P2, the temperature-induced valence transition in EuPd2 Si2, the pressure-induced valence transition in EuRh2 Si2 and EuRu2 P2, and the heavy fermion state approaching to the quantum critical point with increasing pressure in Eu2 Ni3 Ge5.",

author = "Y. Ōnuki and A. Nakamura and F. Honda and D. Aoki and T. Tekeuchi and M. Nakashima and Y. Amako and H. Harima and K. Matsubayashi and Y. Uwatoko and S. Kayama and T. Kagayama and K. Shimizu and {Esakki Muthu}, S. and D. Braithwaite and B. Salce and H. Shiba and T. Yara and Y. Ashitomi and H. Akamine and K. Tomori and M. Hedo and T. Nakama",

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T1 - Divalent, trivalent, and heavy fermion states in Eu compounds

AU - Ōnuki, Y.

AU - Nakamura, A.

AU - Honda, F.

AU - Aoki, D.

AU - Tekeuchi, T.

AU - Nakashima, M.

AU - Amako, Y.

AU - Harima, H.

AU - Matsubayashi, K.

AU - Uwatoko, Y.

AU - Kayama, S.

AU - Kagayama, T.

AU - Shimizu, K.

AU - Esakki Muthu, S.

AU - Braithwaite, D.

AU - Salce, B.

AU - Shiba, H.

AU - Yara, T.

AU - Ashitomi, Y.

AU - Akamine, H.

AU - Tomori, K.

AU - Hedo, M.

AU - Nakama, T.

PY - 2017/12/22

Y1 - 2017/12/22

N2 - Most of the Eu compounds are in the divalent (Eu2+) electronic state and order magnetically. On the other hand, the Eu-trivalent (Eu3+) compounds exist but are small in number. An energy difference between the Eu2+ and Eu3+ states is, however, not extremely large. Therefore, the valence transition occurs in some Eu compounds. We present the characteristic properties of the Eu compounds from several viewpoints: a canting magnetisation in the Eu2+-antiferromagnets, the Fermi surface property in the Eu3+-compounds of EuPd3 and EuCo2 Si2, the heavy fermion state in EuNi2 P2, the temperature-induced valence transition in EuPd2 Si2, the pressure-induced valence transition in EuRh2 Si2 and EuRu2 P2, and the heavy fermion state approaching to the quantum critical point with increasing pressure in Eu2 Ni3 Ge5.

AB - Most of the Eu compounds are in the divalent (Eu2+) electronic state and order magnetically. On the other hand, the Eu-trivalent (Eu3+) compounds exist but are small in number. An energy difference between the Eu2+ and Eu3+ states is, however, not extremely large. Therefore, the valence transition occurs in some Eu compounds. We present the characteristic properties of the Eu compounds from several viewpoints: a canting magnetisation in the Eu2+-antiferromagnets, the Fermi surface property in the Eu3+-compounds of EuPd3 and EuCo2 Si2, the heavy fermion state in EuNi2 P2, the temperature-induced valence transition in EuPd2 Si2, the pressure-induced valence transition in EuRh2 Si2 and EuRu2 P2, and the heavy fermion state approaching to the quantum critical point with increasing pressure in Eu2 Ni3 Ge5.

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Divalent, trivalent, and heavy fermion states in Eu compounds

Abstract

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