Lattice effects and magnetic order in the canted ferromagnetic insulator La{sub {bold 0.875}}Sr{sub {bold 0.125}}MnO{sub {bold 3+{delta}}}
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
The structural, magnetic, and transport behavior of orthorhombic, insulating La{sub 0.875}Sr{sub 0.125}MnO{sub 3+{delta}} were studied as a function of temperature from 20 to 300 K. Upon cooling from room temperature, we observe the rapid development of a large breathing-mode distortion coincident with large positive and negative thermal expansions for the {ital c} and {ital b} axes, respectively. The onset of canted ferromagnetic ordering at 220 K is correlated with the relaxation of this distortion, which reaches values similar to those at room temperature when the magnetic ordering saturates. We observe no first-order-type discontinuity in the volume at the ferromagnetic transition. These results demonstrate a strong coupling between magnetic ordering and crystal structure even though there is no metal-insulator transition associated with the magnetic transition. {copyright} {ital 1996 The American Physical Society.}
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 285707
- Journal Information:
- Physical Review Letters, Vol. 76, Issue 20; Other Information: PBD: May 1996
- Country of Publication:
- United States
- Language:
- English
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