Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-07-31
Phys. Rev. B 66, 052414 (2002)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 4 figures
Scientific paper
10.1103/PhysRevB.66.052414
Due to the complex interplay of magnetic, structural, electronic, and orbital degrees of freedom, biaxial strain is known to play an essential role in the doped manganites. For coherently strained La(2/3)Ca(1/3)MnO(3) thin films grown on SrTiO(3) substrates, we measured the magnetotransport properties both parallel and perpendicular to the substrate and found an anomaly of the electrical transport properties. Whereas metallic behavior is found within the plane of biaxial strain, for transport perpendicular to this plane an insulating behavior and non-linear current-voltage characteristics (IVCs) are observed. The most natural explanation of this anisotropy is a strain induced transition from an orbitally disordered ferromagnetic state to an orbitally ordered state associated with antiferromagnetic stacking of ferromagnetic manganese oxide planes.
Alff Lambert
Carbone Gaspare
Gross Ralf
Klein Jeff
Philipp Jan B.
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