TY - JOUR
T1 - High-magnetic-field XMCD as a novel tool for the study of valence fluctuation phenomena-application to eu-based intermetallic compounds
AU - Matsuda, Y. H.
AU - Her, J. L.
AU - Inami, T.
AU - Ohwada, K.
AU - Ouyang, Z. W.
AU - Okada, K.
AU - Nojiri, H.
AU - Mitsuda, A.
AU - Wada, H.
AU - Kawamura, N.
AU - Suzuki, M.
N1 - Funding Information:
Acknowledgements This work was supported by Grant-in-Aid for Scientific Research on priority Areas “High Field Spin Science in 100 T” (No. 451) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.
PY - 2010/4
Y1 - 2010/4
N2 - X-ray magnetic circular dichroism (XMCD) in Eu-based valence fluctuating compounds, EuNi2(Si1-x Ge x )2 (x=0.82, 0.85) and EuNi2P2 are investigated at high magnetic fields up to 40 T. Distinct two XMCD peaks corresponding to different valence states, i.e., Eu2+ and Eu3+ states are observed in EuNi2(Si1-x Ge x )2 (x=0.82) and EuNi2P2 at the L absorption edges (2p→5d). This suggests that the Eu 5d electrons are magnetically polarized in the both valence states. Since Eu3+ state has nonmagnetic ground state J=0, where J is total angular momentum, finite XMCD of Eu3+ state can be closely related to the magnetic polarization of the conduction electrons that is induced by the local magnetic moments of Eu2+ (J=7/2) state through the strong hybridization.
AB - X-ray magnetic circular dichroism (XMCD) in Eu-based valence fluctuating compounds, EuNi2(Si1-x Ge x )2 (x=0.82, 0.85) and EuNi2P2 are investigated at high magnetic fields up to 40 T. Distinct two XMCD peaks corresponding to different valence states, i.e., Eu2+ and Eu3+ states are observed in EuNi2(Si1-x Ge x )2 (x=0.82) and EuNi2P2 at the L absorption edges (2p→5d). This suggests that the Eu 5d electrons are magnetically polarized in the both valence states. Since Eu3+ state has nonmagnetic ground state J=0, where J is total angular momentum, finite XMCD of Eu3+ state can be closely related to the magnetic polarization of the conduction electrons that is induced by the local magnetic moments of Eu2+ (J=7/2) state through the strong hybridization.
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U2 - 10.1007/s10909-009-0129-z
DO - 10.1007/s10909-009-0129-z
M3 - Article
AN - SCOPUS:77950369785
SN - 0022-2291
VL - 159
SP - 292
EP - 296
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
IS - 1-2
ER -