Chemical pressure control of exchange interaction in Mo pyrochlore

Y. Moritomo, Sh Xu, A. Machida, T. Katsufuji, E. Nishibori, M. Takata, M. Sakata, S. W. Cheong

研究成果: Article査読

60 被引用数 (Scopus)

抄録

Structural parameters are systematically investigated for Mo pyrochlore R2Mo2O7 (R = Dy, Gd, Sm, and Nd) by means of synchrotron radiation x-ray powder diffraction. This system shows a crossover from the spin-glass (SG) state to the ferromagnetic metallic (FM) state as the averaged ionic radius rR of the rare-earth ion increases. We have found the Mo-O-Mo bond angle increases with rR from 129.7° for Dy2Mo2O7 (SG) to 131.5° for Nd2Mo2O7 (FM). This behavior is opposite to the so-called Kanamori-Goodenough rule.

本文言語English
論文番号144425
ページ(範囲)1444251-1444255
ページ数5
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
63
14
DOI
出版ステータスPublished - 2001
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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