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|Title:||Breaking the geometric magnetic frustration in controlled off-stoichiometric LuMn1+zO3+delta compounds|
|Author:||Figueiras, F. G.|
Tavares, P. B.
Leitão, J. V.
Bruck, E. H.
Moreira, J. Agostinho
Amaral, V. S.
|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.|
|Appears in Collections:||CICECO - Artigos|
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|Breaking the geometric magnetic frustration in controlled off-stoichiometric LuMn1+zO3+delta compounds_10.1039c6cp01562j.pdf||1.96 MB||Adobe PDF|
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