Structural transitions and unusual magnetic behavior in Mn-doped Bi1-xLaxFeO3 perovskites

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abstract

The effect of Mn doping on crystal structure and magnetic behavior of the polar antiferromagnetic and antipolar weak ferromagnetic phases of the Bi1-xLaxFeO3 system was investigated. Both reference compounds, Bi0.87La0.13FeO3 (space group R3c, tilting scheme (a(-)a(-)a(-))] and Bi0.82La0.18FeO3 [space group Pnam, tilting scheme (a(-)a(-)c(+))/(a(-)a(-)c(-))], were shown to undergo the Mn doping induced structural phase transformation towards the average Imma (a(-)b(0)a(-)) symmetry. Magnetization measurements performed for the compounds with the close to maximal manganese concentration (y = 0.4) found complex temperature-dependent behavior that can be indicative of a spin-reorientation transition. Enhanced spontaneous magnetization characteristic of the Mn-enriched x = 0.13 and x = 0.18 samples at low temperature is consistent with a competitive character of the superexchange interactions peculiar to the Fe/Mn containing perovskite systems. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4759435]

keywords

BISMUTH FERRITE; WEAK FERROMAGNETISM; PHASE-TRANSITIONS

subject category

Physics

authors

Khomchenko, VA; Troyanchuk, IO; Karpinsky, DV; Das, S; Amaral, VS; Tovar, M; Sikolenko, V; Paixao, JA

our authors

foto Dzmitry Karpinski (Karpinsky)

Dzmitry Karpinski (Karpinsky)

Post-doc Fellowship
foto Vitor Brás Sequeira Amaral

Vitor Brás Sequeira Amaral

Full professor

Groups

G2 - Photonic, Electronic and Magnetic Materials

Projects

Centre for Research in Ceramics and Composite Materials - CICECO (LA0011: 2011-2012) (PEst-C/CTM/LA0011/2011)

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

acknowledgements

This work was supported by funds from FEDER (Programa Operacional Factores de Competitividade COM-PETE) and from FCT-Fundacao para a Ciencia e a Tecnologia under the Project PEst-C/FIS/UI0036/2011, PEst-C/CTM/LA0011/2011, PTDC/FIS/105416/2008, program

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Publication Details

type
Journal Article
year
2012
journal
JOURNAL OF APPLIED PHYSICS
volume
112
article number
084102
publisher
AMER INST PHYSICS
issn
0021-8979
issue
8
digital object identifier
10.1063/1.4759435
web of science article identifier
WOS:000310597500097

Journal Metrics (JCR 2019)

Journal Impact Factor
2.286
Journal Impact Factor (5 yrs)
2.138
category normalized journal percentile
54.87

Citations

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