Simultaneous structural, magnetic, and electronic transitions in La1-xCaxMnO3 with x=0.25 and 0.50

P. G. Radaelli, D. E. Cox, M. Marezio, S. W. Cheong, P. E. Schiffer, A. P. Ramirez

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Abstract

The magnetic transitions in La1-xCaxMnO3 (x=0.25, 0.50) were studied by synchrotron x-ray and neutron powder diffraction. For x=0.25 the large V=0.13% at TC is due to the simultaneous insulator-to-metal transition. For x=0.50 below TC we observed a drastic decrease of the b axis and an increase of the a and c axes, due to a Jahn-Teller distortion of MnO6 octahedra. The ferromagnetic transition for x=0.50 is accompanied by an unusual peak broadening terminating at TN. This newly observed behavior can be explained assuming that multiple intermediate phases are simultaneously present in the sample.

Original languageEnglish (US)
Pages (from-to)4488-4491
Number of pages4
JournalPhysical review letters
Volume75
Issue number24
DOIs
StatePublished - 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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