Optical study of the evolution of charge and spin ordering in the manganese perovskite Bi1-xCaxMn3 (x > 0.5)

H. L. Liu, S. L. Cooper, S. W. Cheong

研究成果: 雜誌貢獻期刊論文同行評審

100 引文 斯高帕斯(Scopus)

摘要

We report an optical reflectivity study of charge and spin ordering in Bi1-xCaxMn3 (x = 0.74 and 0.82) single crystals. In the high temperature phase, T < Tco, which is characterized by ferromagnetic correlations, the low-energy contribution to the optical conductivity σ1(ω) is dominated by small polaron dynamics. For Tco < T < TN, the presence of both small polaron and charge-gap-like features signifies “phase separation” behavior in which domains of ferromagnetic and antiferromagnetic order coexist. Below TN, the polaron response is completely suppressed, and a complete charge gap develops, coincident with the onset of long-range antiferromagnetic order.

原文英語
頁(從 - 到)4684-4687
頁數4
期刊Physical Review Letters
81
發行號21
DOIs
出版狀態已發佈 - 1998

ASJC Scopus subject areas

  • 物理與天文學 (全部)

指紋

深入研究「Optical study of the evolution of charge and spin ordering in the manganese perovskite Bi<sub>1-x</sub>Ca<sub>x</sub>Mn<sub>3</sub> (x > 0.5)」主題。共同形成了獨特的指紋。

引用此