Intermediate Valence State of La<SUB>0.9</SUB>Eu<SUB>0.1</SUB>Ni<SUB>2</SUB>(Si<SUB>1−<I>x</I></SUB>Ge<I><SUB>x</SUB></I>)<SUB>2</SUB> Compounds

Journal of the Physical Society of Japan

Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015

Intermediate Valence State of La_0.9Eu_0.1Ni₂(Si_1−xGe_x)₂ Compounds

Hirofumi Wada, Akihiro Mitsuda, Tomoko Yoshida, Takashi Yamamoto, Tsunehiro Tanaka

著者情報

キーワード: intermediate valence, valence change, La_0.9Eu_0.1Ni₂(Si_1−xGe_x)₂, X-ray absorption spectroscopy

ジャーナル認証あり

2003 年 72 巻 10 号 p. 2604-2607

DOI https://doi.org/10.1143/jpsj.72.2604

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抄録

We examined the temperature dependence of the Eu valence in La_0.9Eu_0.1Ni₂(Si_1−xGe_x)₂ by means of magnetic susceptibility measurements and X-ray absorption spectroscopy. It was found that the Eu ions are in the intermediate valence state for 0.2≤x≤0.8 and the Eu valence gradually varies with temperature. The results are compared with those of the concentrated EuNi₂(Si_1−yGe_y)₂ compounds. The main factor in determining the Eu valence in both dilute and concentrated alloys is discussed.

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© The Physical Society of Japan 2003

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