Phys. Rev. Lett. 75, 4488–4491 (1995)Simultaneous Structural, Magnetic, and Electronic Transitions in La1-xCaxMnO3 with x=0.25 and 0.50Received 15 June 1995; published in the issue dated 11 December 1995 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 ΔV=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. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.4488
DOI:
10.1103/PhysRevLett.75.4488
PACS:
71.70.Ej, 71.30.+h, 75.30.-m
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