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

doi:10.1103/physrevb.63.144425

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

62 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 r_R of the rare-earth ion increases. We have found the Mo-O-Mo bond angle increases with r_R 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
巻	63
号	14
DOI	https://doi.org/10.1103/physrevb.63.144425
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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10.1103/physrevb.63.144425

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abstract = "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.",

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T1 - Chemical pressure control of exchange interaction in Mo pyrochlore

AU - Moritomo, Y.

AU - Xu, Sh

AU - Machida, A.

AU - Katsufuji, T.

AU - Nishibori, E.

AU - Takata, M.

AU - Sakata, M.

AU - Cheong, S. W.

PY - 2001

Y1 - 2001

N2 - 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.

AB - 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.

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Chemical pressure control of exchange interaction in Mo pyrochlore

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