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arXiv · 1303.4831

Charge ordering in the intermediate valence magnet YbPd

Ryo Takahashi·Takashi Honda·Atsushi Miyake·Tomoko Kagayama·Katsuya Shimizu·Takao Ebihara·Tsuyoshi Kimura·Yusuke Wakabayashi
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Abstract

An x-ray diffraction study reveals the charge ordering structure in an intermediate valence magnet YbPd with a CsCl-structure. The valence of the Yb ions forms an incommensurate structure, characterized by the wavevector (+-0.07 +-0.07 1/2) below 130 K. At 105 K, the incommensurate structure turns into a commensurate structure, characterized by the wavevector (0 0 1/2). Based on the resonant x-ray diffraction spectra of the superlattice reflections, the valences of the Yb ions below 105 K are found to be 3+ and 2.6+. The origin of the long wavelength modulation is discussed with the aid of an Ising model having the second nearest neighbor interaction.

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Ryo Takahashi, Takashi Honda, Atsushi Miyake, Tomoko Kagayama, Katsuya Shimizu, Takao Ebihara, Tsuyoshi Kimura, Yusuke Wakabayashi. 2013-03-20. Charge ordering in the intermediate valence magnet YbPd. https://doi.org/10.1103/physrevb.88.054109

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