Evidence for small or intermediate-size polarons in the ferromagnetic state of manganites

Guo-meng Zhao, D. J. Kang, W. Prellier +4

Oxygen-isotope effects on the intrinsic resistivity have been studied in high-quality epitaxial thin films of La_{0.75}Ca_{0.25}MnO_{3} and Nd_{0.7}Sr_{0.3}MnO_{3}. We found that t…