کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5366350 | 1388347 | 2006 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Impact of electric currents on the insulator-metal phase transition in epitaxial thin films of La1âxAxMnO3 (A = Sr, Ca, and Ba) Impact of electric currents on the insulator-metal phase transition in epitaxial thin films of La1âxAxMnO3 (A = Sr, Ca, and Ba)](/preview/png/5366350.png)
The influence of dc currents with a high current density on the transport properties of epitaxial La1âxAxMnO3 (AÂ =Â Sr, Ca, and Ba) thin films were studied. An application of a large current could lead to a remarkable reduction in the insulator-metal phase transition peak, demonstrating a significant electroresistance effect. After removing such currents the samples could completely return to its pristine state. Our experiments reveal that such an electroresistance should be a common feature for the perovskite manganites, rather than the results caused by the self-heating or self magnetic field. It may be ascribed to the two aspects: one is the strong interaction between carrier spins and localized spins in Mn ions, the other is the percolative mechanism of phase separation.
Journal: Applied Surface Science - Volume 252, Issue 15, 30 May 2006, Pages 5521-5524