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Title: Breaking the geometric magnetic frustration in controlled off-stoichiometric LuMn1+zO3+delta compounds
Author: Figueiras, F. G.
Karpinsky, D.
Tavares, P. B.
Das, Soma
Leitão, J. V.
Bruck, E. H.
Moreira, J. Agostinho
Amaral, V. S.
Issue Date: Apr-2016
Publisher: Royal Society of Chemistry
Abstract: This study explores controlled off-stoichiometric LuMn1+zO3+δ (|z| < 0.1) compounds, intended to retain the utter LuMnO3 intrinsic hexagonal symmetry and ferroelectric properties. X-ray powder diffraction measurements evidenced a single phase P63cm structure. Thermo-gravimetric experiments show a narrow impact of oxygen vacancies while a distinguishable gas exchange at ∼700 K, a surprisingly lower temperature when compared to perovskite systems. A comparison of different nominal ceramics revealed pertinent structural and magnetic property variations owing to subtle self-doping effects. Deviations from the archetypal antiferromagnetic state were detected below ∼90 K suggesting local rearrangements of the nominal Mn3+ ions matrix, breaking the ideal geometrical spin frustration, leading to a non-compensated magnetic structure.
Peer review: yes
DOI: 10.1039/c6cp01562j
ISSN: 1463-9076
Appears in Collections:CICECO - Artigos

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