Architecture of nanoscale ferroelectric domains in GaMo4S8.
Authors of this article are:
Neuber E Milde P Butykai Á Bordacs S Nakamura H Waki T Tabata Y Geirhos K Lunkenheimer P Kézsmárki I Ondrejkovic P Hlinka J Eng L.
A summary of the article is shown below:
Local-probe imaging of the ferroelectric domain structure and auxiliary bulk pyroelectric measurements were conducted at low temperatures with the aim to clarify the essential aspects of the orbitally driven phase transition in GaMo<sub>4</sub>S<sub>8</sub>, a lacunar spinel crystal that can be viewed as a spin-hole analogue of its GaV<sub>4</sub>S<sub>8</sub> counterpart. We employed multiple scanning probe techniques combined with symmetry and mechanical compatibility analysis to uncover the hierarchical domain structures, developing on the 10-100 nm scale. The identified domain architecture involves a plethora of ferroelectric domain boundaries and junctions, including primary and secondary domain walls in both electrically neutral and charged configurations, and topological line defects transforming neutral secondary walls into two oppositely charged ones.
Check out the article’s website on Pubmed for more information:
This article is a good source of information and a good way to become familiar with topics such as: Kelvin probe force microscopy;domain walls;ferroelectricity;lacunar spinel;multiferroicity;piezoresponse force microscopy;topology.
Categories: Science News