High-Magnetic-Field X-ray Absorption Spectroscopy of Field-Induced Valence Transition in YbInCu_4(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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概要

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• The magnetic field-induced valence transition in YbInCu_4 has been studied by X-ray absorption spectroscopy at the Yb L_<III>-edge up to 41 T. The field-induced valence transition is clearly observed as a significant change in the absorption spectra. Magnetic field dependences of Yb valence at low temperatures are directly determined for the first time. It is found that the valence above the metamagnetic transition recovers from Yb^<2.84+> to Yb^<2.96+> which is identical to that in the high-temperature phase. Variation of the valence is also obtained in the B-T (magnetic field-temperature) plane at 0 < B < 41 T and 5 < T < 50 K.

• 2007-03-15

著者

• Murata Y

  Department Of Electrical Engineering Faculty Of Science And Technology Science University Of Tokyo

• MATSUDA Y.

  Institute for Solid State Physics, University of Tokyo

• Ohta H

  Department Of Aeronautics And Astronautics Kyushu University

• Yoshimura K

  Department Of Biological Sciences Graduate School Of Science University Of Tokyo

• Zhang W

  Department Of Applied Chemistry The Northeast China Institute Of Electric Power

• Inami T.

  Synchrotron Radiation Research Center Japan Atomic Energy Research Institute

• Ohwada K.

  Synchrotron Radiation Research Center Japan Atomic Energy Research Institute

• NOJIRI H

  Institute for Materials Research, Tohoku University

• OHWADA K

  Synchrotron Radiation Research Unit, Japan Atomic Energy Agency

• MURAKAMI Y

  Graduate School of Science, Tohoku University

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