Link of Weak Ferromagnetism to Emergence of Topological Vortices in Bulk Ceramics of h-LuMnxO3 Manganite
authors Baghizadeh, A; Vaghefi, PM; Alikin, DO; Amaral, JS; Amaral, VS; Vieira, JM
nationality International
journal JOURNAL OF PHYSICAL CHEMISTRY C
keywords MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; DEFECTS; PHASE; FERROELECTRICITY; CONDUCTIVITY; OXYGEN
abstract Research on topological defects in hexagonal manganites exposed uncovered properties of topologically protected domains and domain walls. Topological defects of h-REMnO3 oxides (RE = Lu-Dy and Sc, In) modify essential multiferroic properties. Despite wide research with single crystals of stoichiometric composition, for the case of polycrystalline ceramics rare studies explored the effects of adjustment in chemical composition on phase transition temperatures, antiferromagnetic ordering, topological domain sizes, and potential modifications of the vortex density predicted by the Kibble-Zurek mechanism (KZM). The effect of cation vacancy doping of either Mn, or Lu sublattices of h-LuMnxO3, on appearance of ferroelectric vortices at the Curie point of apolar-to-polar ferroelectric ordering, T-C, in bulk ceramics is investigated here. For cooling rates up to 40 K min(-1) the Kibble-Zurek mechanism sets the density of FE vortices in ceramics of the LuMnxO3 system. Magnetic hysteresis loops taken from the representative samples show sensitivity of remnant and magnetic coercivity field to FE vortex density. Magnetization measured from magnetic hysteresis loops supports theoretical predictions on induced net magnetization of the AFM walls and gives further evidence on the essential role of FE domain walls on multiferroic properties of h-REMnO3.
publisher AMER CHEMICAL SOC
issn 1932-7447
year published 2019
volume 123
issue 10
beginning page 6158
ending page 6166
digital object identifier (doi) 10.1021/acs.jpcc.8b11253
web of science category Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000461537400037
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 4.484
5 year journal impact factor 4.691
category normalized journal impact factor percentile 73.464
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg