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

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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]

keywords

GIANT MAGNETORESISTANCE; PHASE-TRANSITION; MANGANITES; LAMNO3; SIZE

subject category

Physics

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

our authors

foto João Cunha de Sequeira Amaral

João Cunha de Sequeira Amaral

Assistant Researcher
foto João Nuno Santos Gonçalves

João Nuno Santos Gonçalves

Junior Researcher
foto Vitor Brás Sequeira Amaral

Vitor Brás Sequeira Amaral

Full professor

Groups

G2 - Photonic, Electronic and Magnetic Materials

Projects

MULTIFOX: Nanometric Probing and Modification of Multiferroic Oxides (PTDC/FIS/105416/2008)

acknowledgements

The authors acknowledge the financial support from FCT through Grant No. SFRH/BPD/39262/2007 (S. Das), SFRH/BPD/63942/2009 (J. S. Amaral), UGC-Dr. D. S. Kothari Post-Doctoral Fellowship under the Project No. F.4-2/2006(BSR)/13-307/2008(BSR) (K. De) and from FCT through Grant Numbers SFRH/BPD/47128/2008 (K. De) and SFRH/BD/63698/2009 (A. Roy), and partial funding from the program COMPETE-FEDER under project PTDC/FIS/105416/2008.

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Publication Details

type
Journal Article
year
2013
journal
APPLIED PHYSICS LETTERS
volume
102
article number
112408
publisher
AMER INST PHYSICS
issn
0003-6951
issue
11
digital object identifier
10.1063/1.4793657
web of science article identifier
WOS:000316544900055

Journal Metrics (JCR 2019)

Journal Impact Factor
3.597
Journal Impact Factor (5 yrs)
3.4
category normalized journal percentile
76.299

Citations

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