TY - JOUR
T1 - Temperature dependent X-ray absorption spectroscopy of the valence transition in EuNi2(Si0.20Ge0.80)2
AU - Yamamoto, Kazuya
AU - Horiba, Koji
AU - Taguchi, Munetaka
AU - Matsunami, Masaharu
AU - Kamakura, Nozomu
AU - Takata, Yasutaka
AU - Chainani, Ashish
AU - Mimura, Kojiro
AU - Shiga, Masayuki
AU - Wada, Hirofumi
AU - Senba, Yasunori
AU - Ohashi, Haruhiko
AU - Shin, Shik
PY - 2006/5/1
Y1 - 2006/5/1
N2 - We investigate the temperature induced mixed valence transition in EuNi2(Si0.2Ge0.8)2 using Eu 3d-4f X-ray absorption spectroscopy (XAS). The unoccupied 4f states are studied as a function of temperature (27-120 K), across the critical valence temperature, Tv = 80 K. The Eu 3d-4f X-ray absorption spectra show systematic changes of the mixed valency with temperature. The Eu2 + and Eu3 + spectral features match very well with atomic multiplet calculations. The observed non-integral mean valence changes systematically from ∼ 2.70 ± 0.03 (27 K) to ∼ 2.35 ± 0.03 (120 K), consistent with bulk-sensitive measurements.
AB - We investigate the temperature induced mixed valence transition in EuNi2(Si0.2Ge0.8)2 using Eu 3d-4f X-ray absorption spectroscopy (XAS). The unoccupied 4f states are studied as a function of temperature (27-120 K), across the critical valence temperature, Tv = 80 K. The Eu 3d-4f X-ray absorption spectra show systematic changes of the mixed valency with temperature. The Eu2 + and Eu3 + spectral features match very well with atomic multiplet calculations. The observed non-integral mean valence changes systematically from ∼ 2.70 ± 0.03 (27 K) to ∼ 2.35 ± 0.03 (120 K), consistent with bulk-sensitive measurements.
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U2 - 10.1016/j.physb.2006.01.507
DO - 10.1016/j.physb.2006.01.507
M3 - Article
AN - SCOPUS:33646396189
VL - 378-380
SP - 681
EP - 682
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - SPEC. ISS.
ER -