Breaking the geometric magnetic frustration in controlled off-stoichiometric LuMn1+zO3+delta compounds

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Figueiras, FG (Author) FCUP; Karpinsky, D (Author) Other; Tavares, PB (Author) Other; Das, S (Author) Other; Leitao, JV (Author) Other; Bruck, EH (Author) Other; Agostinho Moreira, JA (Author) FCUP; Amaral, VS (Author) Other

Journal

Title: Physical Chemistry Chemical Physics

Vol. 18

Pages: 13519-13523

ISSN: 1463-9076

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-00K-GAD

DOI: 10.1039/c6cp01562j

Abstract (EN): This study explores controlled off-stoichiometric LuMn1+zO3+delta (vertical bar z vertical bar < 0.1) compounds, intended to retain the utter LuMnO3 intrinsic hexagonal symmetry and ferroelectric properties. X-ray powder diffraction measurements evidenced a single phase P6(3)cm structure. Thermo-gravimetric experiments show a narrow impact of oxygen vacancies while a distinguishable gas exchange at similar to 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 similar to 90 K suggesting local rearrangements of the nominal Mn3+ ions matrix, breaking the ideal geometrical spin frustration, leading to a non-compensated magnetic structure.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5