Anomalous ferromagnetic behavior and large magnetoresistance induced by orbital fluctuation in heavily doped Nd1-x Srx Mn O3 (0.57≤x≤0.75)

D. Akahoshi, R. Hatakeyama, M. Nagao, T. Asaka, Y. Matsui, H. Kuwahara

研究成果: Article査読

21 被引用数 (Scopus)

抄録

We have elaborately investigated heavily doped Nd1-x Srx Mn O3 with x=0.57-0.75. 3 z2 - r2 and x2 - y2 orbital orders strongly compete with each other at x=0.625. The competition causes spatial orbital fluctuation on nanometer scale below the orbital ordering temperature (TOO ∼500 K), which is evidenced by the observation of tweed structure using transmission electron microscopy. The orbital fluctuation, which persists down to lowest temperatures, gives rise to anomalous ferromagnetic behavior and concomitant large magnetoresistance well below the Néel temperature (TN =220 K).

本文言語English
論文番号054404
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
77
5
DOI
出版ステータスPublished - 2008 2 4
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学

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