Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
89 (2001), S. 6976-6978
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The effects of substitution of Ca by Ba in La1−xCaxMnO3 (LCMO) with x〈0.5 were investigated systematically in order to clarify the role of the size of the A cations. As for the La1−x(Ba–Ca)xMnO3 (LBCMO) films of ferromagnetic metallic (FMM) region (x=0.2; 0.3; and 0.4), by doping Ba, the ferromagnetic transition temperature (TC) and the insulator-to-metal (IM) transition temperature (TIM) were improved about 30–60 K, compared with those of LCMO thin films with the same ratio of Mn3+:Mn4+. Especially, La0.7Ba0.1Ca0.2MnO3 thin films have an anomalously high TC (about room temperature) and a TIM of 275 K under zero field. In the ferromagnetic insulating (FMI) region (x=0.15; 0.1), the Ba doping enables the IM transition and remarkably heightens the TC as well. The phase diagram shows that in the slightly doped region (x〈0.5), Ba doping has made the FMM phase significantly expanded. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1358335
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