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

authors	Das, S; Amaral, JS; De, K; Willinger, M; Goncalves, JN; Roy, A; Dhak, P; Giri, S; Majumder, S; Silva, CJR; Gomes, MJM; Mahapatra, PK; Amaral, VS
nationality	International
journal	APPLIED PHYSICS LETTERS
keywords	GIANT MAGNETORESISTANCE; PHASE-TRANSITION; MANGANITES; LAMNO3; SIZE
abstract	We report an unusual high-temperature ferromagnetic transition in bulk single-phase nanocrystalline La0.95Sr0.05MnO3+delta, achieved through localized strain and inhomogeneous Sr-doping. Magnetization measurements show a well defined transition at 290K and a broad one at similar to 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. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793657]
publisher	AMER INST PHYSICS
issn	0003-6951
year published	2013
volume	102
issue	11
digital object identifier (doi)	10.1063/1.4793657
web of science category	Physics, Applied
subject category	Physics
unique article identifier	WOS:000316544900055