**Author details**

Aimé Peláiz-Barranco1\*, Yuslín González Abreu1 , José de los Santos Guerra2 , Jinfei Wang3,4, Tongqing Yang3 and Pierre Saint-Grégoire5

\*Address all correspondence to: pelaiz@fisica.uh.cu

1 Facultad de Física - Instituto de Ciencia y Tecnología de Materiales, Universidad de La Ha‐ bana. San Lázaro y L, Vedado. La Habana, Cuba

2 Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Fed‐ eral de Uberlândia. Uberlândia – M G, Brazil

3 Functional Materials Research Laboratory, College for Materials Science and Engineering, Tongji University, Caoan, Shanghai, China

4 Dwo Chemical (China) Investment, LTD. Pudong district, Shanghai, China

5 University of Nîmes, Department of Sciences and Arts, Nimes cedex, France
