Isotropic parallel antiferromagnetism in the magnetic field induced charge-ordered state of SmRu4 P12 caused by p-f hybridization

T. Matsumura; S. Michimura; T. Inami; C. H. Lee; M. Matsuda; H. Nakao; M. Mizumaki; N. Kawamura; M. Tsukagoshi; S. Tsutsui; H. Sugawara; K. Fushiya; T. D. Matsuda; R. Higashinaka; Y. Aoki

doi:10.1103/PhysRevB.102.214444

Isotropic parallel antiferromagnetism in the magnetic field induced charge-ordered state of SmRu4 P12 caused by p-f hybridization

T. Matsumura, S. Michimura, T. Inami, C. H. Lee, M. Matsuda, H. Nakao, M. Mizumaki, N. Kawamura, M. Tsukagoshi, S. Tsutsui, H. Sugawara, K. Fushiya, T. D. Matsuda, R. Higashinaka, Y. Aoki

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Abstract

Nature of the field-induced charge-ordered phase (phase II) of SmRu4P12 has been investigated by resonant x-ray diffraction (RXD) and polarized neutron diffraction (PND), focusing on the relationship between the atomic displacements and the antiferromagnetic (AFM) moments of Sm. From the analysis of the interference between the nonresonant Thomson scattering and the resonant magnetic scattering, combined with the spectral function obtained from x-ray magnetic circular dichroism, it is shown that the AFM moment of Sm prefers to be parallel to the field (mAF∥H), giving rise to large and small moment sites around which the P12 and Ru cage contract and expand, respectively. This is associated with the formation of the staggered ordering of the Γ7-like and Γ8-like crystal-field states, providing a strong piece of evidence for the charge order. PND was also performed to obtain complementary and unambiguous conclusion. In addition, isotropic and continuous nature of phase II is demonstrated by the field-direction invariance of the interference spectrum in RXD. Crucial role of the p-f hybridization is shown by resonant soft x-ray diffraction at the P K edge (1s↔3p), where we detected a resonance due to the spin polarized 3p orbitals reflecting the AFM order of Sm.

Original language	English
Article number	214444
Journal	Physical Review B
Volume	102
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.102.214444
State	Published - Dec 31 2020

Funding

The authors acknowledge valuable discussions with R. Shiina and H. Harima. This work was supported by JSPS KAKENHI Grant Nos. JP20102005 (Heavy Electrons), JP15K05175, JP15H05885 (J-Physics), JP17K05130, JP17H05209, JP18H01182, JP18K18737, and JP20H01854. The synchrotron radiation experiments at SPring-8 were performed under Proposal Nos. 2015A3711 (BL22XU) and 2019B1247 (BL39XU). The synchrotron radiation experiments at KEK was performed under the approval of the Photon Factory Program Advisory Committee (Proposal Nos. 2012S2-005, 2017PF-BL-19B, and 2017G553). The neutron scattering experiment at ORNL was supported by the U.S.-Japan Cooperative Program on Neutron Scattering. This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

Funders	Funder number
Japan Society for the Promotion of Science	JP15K05175, JP18H01182, JP15H05885, JP20H01854, JP18K18737, JP20102005, JP17K05130, JP17H05209

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10.1103/PhysRevB.102.214444

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Matsumura, T., Michimura, S., Inami, T., Lee, C. H., Matsuda, M., Nakao, H., Mizumaki, M., Kawamura, N., Tsukagoshi, M., Tsutsui, S., Sugawara, H., Fushiya, K., Matsuda, T. D., Higashinaka, R., & Aoki, Y. (2020). Isotropic parallel antiferromagnetism in the magnetic field induced charge-ordered state of SmRu4 P12 caused by p-f hybridization. Physical Review B, 102(21), Article 214444. https://doi.org/10.1103/PhysRevB.102.214444

@article{c196db30226845edaa0c492719e75574,

title = "Isotropic parallel antiferromagnetism in the magnetic field induced charge-ordered state of SmRu4 P12 caused by p-f hybridization",

abstract = "Nature of the field-induced charge-ordered phase (phase II) of SmRu4P12 has been investigated by resonant x-ray diffraction (RXD) and polarized neutron diffraction (PND), focusing on the relationship between the atomic displacements and the antiferromagnetic (AFM) moments of Sm. From the analysis of the interference between the nonresonant Thomson scattering and the resonant magnetic scattering, combined with the spectral function obtained from x-ray magnetic circular dichroism, it is shown that the AFM moment of Sm prefers to be parallel to the field (mAF∥H), giving rise to large and small moment sites around which the P12 and Ru cage contract and expand, respectively. This is associated with the formation of the staggered ordering of the Γ7-like and Γ8-like crystal-field states, providing a strong piece of evidence for the charge order. PND was also performed to obtain complementary and unambiguous conclusion. In addition, isotropic and continuous nature of phase II is demonstrated by the field-direction invariance of the interference spectrum in RXD. Crucial role of the p-f hybridization is shown by resonant soft x-ray diffraction at the P K edge (1s↔3p), where we detected a resonance due to the spin polarized 3p orbitals reflecting the AFM order of Sm.",

author = "T. Matsumura and S. Michimura and T. Inami and Lee, {C. H.} and M. Matsuda and H. Nakao and M. Mizumaki and N. Kawamura and M. Tsukagoshi and S. Tsutsui and H. Sugawara and K. Fushiya and Matsuda, {T. D.} and R. Higashinaka and Y. Aoki",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

year = "2020",

month = dec,

day = "31",

doi = "10.1103/PhysRevB.102.214444",

language = "English",

volume = "102",

journal = "Physical Review B",

issn = "2469-9950",

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Matsumura, T, Michimura, S, Inami, T, Lee, CH, Matsuda, M, Nakao, H, Mizumaki, M, Kawamura, N, Tsukagoshi, M, Tsutsui, S, Sugawara, H, Fushiya, K, Matsuda, TD, Higashinaka, R & Aoki, Y 2020, 'Isotropic parallel antiferromagnetism in the magnetic field induced charge-ordered state of SmRu4 P12 caused by p-f hybridization', Physical Review B, vol. 102, no. 21, 214444. https://doi.org/10.1103/PhysRevB.102.214444

TY - JOUR

T1 - Isotropic parallel antiferromagnetism in the magnetic field induced charge-ordered state of SmRu4 P12 caused by p-f hybridization

AU - Matsumura, T.

AU - Michimura, S.

AU - Inami, T.

AU - Lee, C. H.

AU - Matsuda, M.

AU - Nakao, H.

AU - Mizumaki, M.

AU - Kawamura, N.

AU - Tsukagoshi, M.

AU - Tsutsui, S.

AU - Sugawara, H.

AU - Fushiya, K.

AU - Matsuda, T. D.

AU - Higashinaka, R.

AU - Aoki, Y.

PY - 2020/12/31

Y1 - 2020/12/31

N2 - Nature of the field-induced charge-ordered phase (phase II) of SmRu4P12 has been investigated by resonant x-ray diffraction (RXD) and polarized neutron diffraction (PND), focusing on the relationship between the atomic displacements and the antiferromagnetic (AFM) moments of Sm. From the analysis of the interference between the nonresonant Thomson scattering and the resonant magnetic scattering, combined with the spectral function obtained from x-ray magnetic circular dichroism, it is shown that the AFM moment of Sm prefers to be parallel to the field (mAF∥H), giving rise to large and small moment sites around which the P12 and Ru cage contract and expand, respectively. This is associated with the formation of the staggered ordering of the Γ7-like and Γ8-like crystal-field states, providing a strong piece of evidence for the charge order. PND was also performed to obtain complementary and unambiguous conclusion. In addition, isotropic and continuous nature of phase II is demonstrated by the field-direction invariance of the interference spectrum in RXD. Crucial role of the p-f hybridization is shown by resonant soft x-ray diffraction at the P K edge (1s↔3p), where we detected a resonance due to the spin polarized 3p orbitals reflecting the AFM order of Sm.

AB - Nature of the field-induced charge-ordered phase (phase II) of SmRu4P12 has been investigated by resonant x-ray diffraction (RXD) and polarized neutron diffraction (PND), focusing on the relationship between the atomic displacements and the antiferromagnetic (AFM) moments of Sm. From the analysis of the interference between the nonresonant Thomson scattering and the resonant magnetic scattering, combined with the spectral function obtained from x-ray magnetic circular dichroism, it is shown that the AFM moment of Sm prefers to be parallel to the field (mAF∥H), giving rise to large and small moment sites around which the P12 and Ru cage contract and expand, respectively. This is associated with the formation of the staggered ordering of the Γ7-like and Γ8-like crystal-field states, providing a strong piece of evidence for the charge order. PND was also performed to obtain complementary and unambiguous conclusion. In addition, isotropic and continuous nature of phase II is demonstrated by the field-direction invariance of the interference spectrum in RXD. Crucial role of the p-f hybridization is shown by resonant soft x-ray diffraction at the P K edge (1s↔3p), where we detected a resonance due to the spin polarized 3p orbitals reflecting the AFM order of Sm.

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DO - 10.1103/PhysRevB.102.214444

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SN - 2469-9950

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JO - Physical Review B

JF - Physical Review B

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ER -

Isotropic parallel antiferromagnetism in the magnetic field induced charge-ordered state of SmRu4 P12 caused by p-f hybridization

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