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Electrical transport and magnetoresistance in thick films of lanthanum calcium manganite prepared by tape casting (2002)

Srinivasan, G. ; Rasmussen, E. T.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 80 (2002), S. 464-466

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: The observation of unique thickness-dependent resistivity and magnetoresistance is reported in thick films of La0.7Ca0.3MnO3 synthesized by tape casting. Samples were prepared from tapes with layer thickness L ranging from 6 to 40 μm. Ferromagnetic resonance was used to probe the homogeneity of the films. The maximum zero-field electrical resistivity ρm(0) and low-field magnetoresistance (MR) data show: (i) an exponential drop in ρm(0) with increasing L (an inverse square dependence) and (ii) an exponential increase in MR with L (a square-root dependence). The results are in qualitative agreement with tunneling-assisted electrical transport. © 2002 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1436283

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