Magnetic and transport properties of EuNi(Si1-xGex)3compounds

Uchima, Kiyoharu; Takaesu, Yoshinao; Akamine, Hikaru; Kakihana, Masashi; Tomori, K; Uejo, Taro; Teruya, Atsushi; Nakamura, Ai; Hedo, Masato; Nakama, Takao; Yagasaki, Kazuyuki; Matsubayashi, K.; Uwatoko, Yoshiya

doi:10.1088/1742-6596/568/4/042032

Cited by 3 publications

(1 citation statement)

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“…Despite the variation of transition metal substitution and the change in the unit cell volume, the Eu ions seems to have a robust Eu 2+ valence state with T N being barely affected. In the EuNi(Si 1−x Ge x ) 3 system, transport measurements reported a monotonous decrease of T N with an increase in Ge substitution indicating its strong connection with the volume change 26 . However, the change of T N in EuT Ge 3 by transition metal substitution does not show a propotional change with the unit cell volume.…”

Section: Introductionmentioning

confidence: 97%

Bulk electronic structure of non-centrosymmetric EuTGe3 ( T=Co , Ni, Rh, Ir) studied by hard x-ray photoelectron spectroscopy

et al. 2018

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Non-centrosymmetric EuT Ge3 (T =Co, Ni, Rh, and Ir) possesses magnetic Eu 2+ ions and antiferromagnetic ordering appears at low temperatures. Transition metal substitution leads to changes of the unit cell volume and of the magnetic ordering. However, the magnetic ordering temperature does not scale with the volume change and the Eu valence is expected to remain divalent. Here we study the bulk electronic structure of non-centrosymmetric EuT Ge3 (T =Co, Ni, Rh, and Ir) by hard x-ray photoelectron spectroscopy. The Eu 3d core level spectrum confirms the robust Eu 2+ valence state against the transition metal substitution with a small contribution from Eu 3+ . The estimated Eu mean-valence is around 2.1 in these compounds as confirmed by multiplet calculations. In contrast, the Ge 2p spectrum shifts to higher binding energy upon changing the transition metal from 3d to 4d to 5d elements, hinting of a change in the Ge-T bonding strength. The valence bands of the different compounds are found to be well reproduced by ab initio band structure calculations.

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Section: Introductionmentioning

confidence: 97%