La-site shift as probe for Jahn-Teller effect

2001/05/09 by Bas B. Van Aken, Bas B. van Aken, Auke Meetsma +5
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #Solid-state spectroscopy and crystallography #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.cond-mat/0105197

4 pages, including 6 figures

arxiv created 2001/05/09 · openalex publication_date 2001/05/09 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We observe two consecutive transitions in La1-xCaxMnO3, x=0.19: ferromagnetic ordering at Tc = 177 K and Jahn-Teller orbital ordering at T_JT = 150 K. The presence of a ferromagnetic insulating state below T_JT shows that the metallic phase is bound by ferromagnetic and Jahn- Teller ordering, and not induced by a critical doping concentration. The A-site shift is found to be a good indicator of Jahn-Teller ordering. Furthermore, the A-site shift does not disapppear above T_JT, indicating a dynamical behaviour of the distorted MnO6 octahedra.

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