Strain induced enhanced ferromagnetic behavior in inhomogeneous low doped La0.95Sr0.05MnO3+δ

S. Das, J. S. Amaral, K. De, M. Willinger, J. N. Gonçalves, A. Roy, P. Dhak, S. Giri, S. Majumder, C. J.R. Silva, M. J.M. Gomes, P. K. Mahapatra, V. S. Amaral

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We report an unusual high-temperature ferromagnetic transition in bulk single-phase nanocrystalline La0.95Sr0.05MnO 3+δ, achieved through localized strain and inhomogeneous Sr-doping. Magnetization measurements show a well defined transition at 290 K and a broad one at ∼150 K. HRTEM imaging reveals the strain on the highly crystalline nanometer sized grains and Sr-doping gradients, while oxygen homogeneity at the grain interfaces is confirmed by EELS-spectra. The magnetic behavior, far from the expected bulk phase diagram, shows how local doping and strain can strongly tune the macroscopic properties of a bulk material.

Original languageEnglish
Article number112408
JournalApplied Physics Letters
Issue number11
StatePublished - 18 Mar 2013
Externally publishedYes


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