Temperature and field dependence of resistivities and anisotropy of layered manganites La₂₋₂ₓSr₁₊₂ₓMn₂O₇

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DOIResolve DOI: http://doi.org/10.1016/S0921-4534(00)00695-X
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TypeArticle
Journal titlePhysica C: Superconductivity
Volume341-348
Issue2
Pages791792; # of pages: 2
AbstractIn-plane ϱab and out-of-plane ϱc resistivities of La1.2Sr1.8Mn2O7 and LaSr2Mn2O7 have been measured by a multiterminal technique. We focus on the effects that magnetic and charge ordering transitions have on the anisotropy σab/σc which reflects the ratio of the phase coherence lengths in the respective directions. Both resistivities of La1.2Sr1.8Mn2O7 decrease dramatically below the Curie temperature TC ≈ 135 K. Anisotropy changes with temperature nonmonotonically and displays a peak close to TC. In LaSr2Mn2O7, ϱc and ϱab display a broad peak close to the paramagnetic-antiferromagnetic transition temperature TN ≈ 165 K. The anisotropy exhibits an even more complex behavior than in La1.2Sr1.8Mn2O7, displaying a maximum at the charge ordering temperature and a minimum at TN.
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NPARC number12329142
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Record identifier85004517-f2e4-4786-a4ff-f9694e95a912
Record created2009-09-10
Record modified2016-05-09
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