Are cuprates good candidates for high-Tc multiferroism?
Feb 23, 2023
2:30PM to 3:30PM
Date(s) - 23/02/2023
2:30 pm - 3:30 pm
Prof. Xavier Rocquefelte
Dept. of Chemistry, University of Rennes 1, France
Magnetoelectric (ME) multiferroics (MF), which combine electric and magnetic dipole orders, are multifunctional materials with a high potential in new technologies. The main goal of our project is the search of high-temperature and high-polarization (Ps) multiferroics, i.e. with a large ME-MF coupling and thus large PS, operating at room-temperature, and showing an electric-field magnetization reversal. In 2008, CuO has been shown to be a promising candidate and more recently BaCuF4. Here we will discuss the opportunities that cuprates offer. Are they really promising candidates for high-Tc multiferroism?
Xavier Rocquefelte has a full professor position at the University of Rennes, since 2014 (ISCR, UMR 6226), where he works on developing more efficient magnetic and multiferroic materials. He received his Ph.D. in 2001 from the University of Nantes working on the modelling of lithium batteries. He completed 4 years of Postdoctoral fellowship between Belgium, France and USA, working on nanomaterials, borocarbides and photo-induced properties. He specializes in the calculations of electronic, optical and magnetic properties with expertise in density-functional theory (DFT) combined to a wide range of spectroscopies. His background is in Materials Science, and DFT is used as a probe to understand the structure-properties relationships. He is an expert of the VASP and WIEN2k codes. In particular, he gave lessons on the « calculations of magnetic properties using DFT » (https://youtu.be/1ihTHElNK4Y.) and « Relativistic effects and non-collinear magnetism ».
In-Person: ABB 102