Peak resistance temperature and low temperature resistivity in thin film $La_{1-x} Ca_x Mn O_3$ mixtures for x <= 1/3

Details Peak resistance temperature and low temperature resistivity in thin film $La_{1-x} Ca_x Mn O_3$ mixtures for x <= 1/3 Peak resistance temperature and low temperature resistivity in thin film $La_{1-x} Ca_x Mn O_3$ mixtures for x <= 1/3

2006-09-08

arxiv.org/abs/cond-mat/0609206v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 7 figures

Scientific paper

The electrical resistivity of La$_{1-x}$Ca$_{x}$MnO$_{3}$ thin films grown on (001) NdGaO$_{3}$ and (100) SrTiO$_{3}$ substrates by off-axis sputtering has been studied as a function of the Calcium doping level. The samples have very narrow rocking curves and excellent in plane registry with the substrate. A strong correlation between the peak resistance temperature and the polaronic hopping energy is seen which is not simply linear. The low temperature resistivity is seen to be fit better by a model of single magnon scattering, and a near linear correlation between the resistivity due to magnon scattering and static impurities is observed.

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