Advances in Ferroelectric and Multiferroic Materials

One century after the discovery of ferroelectricity, and two decades ferroelectric random access memories were first commercialized, this Special Issue Advanced Electronic Materials demonstrates that field ferroelectricity is in robust health. First, arises very different types material via mechanisms. Second, domains each type are liable to switch differently, for both intrinsic reasons (chemical formula) extrinsic (microstructure/strain). Third, an electrical polarization can display complex topologies. Fourth, order parameters couple other parameters, e.g. magnetic parameters. Fifth, ferroelectrics be modified using light. Sixth, there continue improvements techniques measure ferroic materials. Seventh, attract attention experimentalists theorists alike. We thank all these people their wonderful contributions, below we identify papers name person invited. Last, Dr Gaia Tomasello suggesting topic inviting us Guest Editors. It has been a pleasure working with her. Three describe aspects domain switching. Gustau Catalan co-workers investigate effect humidity on tip write into BaTiO3 films, observing drily results might vary between Dublin Dubai (aelm.202100650). Kathrin Dörr use unbiased mechanically nanoscale polymer films PVDF-TrFE (aelm.202101416). Judith Driscoll role defects memristive switching, resulting dissipation power, BaTiO3, BiFeO3, Bi1-xFeO3?? (aelm.202101392). Four report various developments CMOS-compatible ferroelectrics. Cheol Seong Hwang improve endurance beyond 1011 cycles by inserting sacrificial layer HfO0.61N0.72 TiN bottom electrode film Hf0.5Zr0.5O2 (aelm.202100042). Susan Trolier-McKinstry Al1?xBxN grown single polarity more susceptible wake-up than mixed polarities (aelm.202100931). Sayeef Salahuddin demonstrate tunnel junction 1 nm-thick barrier HfO2 (aelm.202100499). Laura Bégon-Lours synapse based 3.5 HfZrO4 was crystallized at relatively low temperature 400°C (aelm.202101395). Seven exotic Manfred Fiebig contrast hybrid improper Ca3Mn1.9Ti0.1O3 proper revealing charged walls thermally driven phase transition asymmetric (aelm.202100434). Sang-Wook Cheong reveal large switching polarization, processes, CsBiNb2O7 (aelm.202100929). Tsuyoshi Kimura present progress which they review develop own work chiral-lattice magnet Pb(TiO)Cu4(PO4)4, transverse magnetization component switched reversal applied electric (aelm.202200167). Kee Hoon Kim observe spin-driven van der Waals antiferromagnet CuCrP2S6, infer even should magnetoelectric coupling (aelm.202101072). Tae Won Noh metastable CaTiO3 thickness-driven morphotropic transition, thus good piezoelectricity (aelm.202101398). Wen Zhang new ammonium-crown ether inclusion compound order-disorder molecular high Curie 392 K (aelm.202100635). Jun Harada crystal [MDABCO][PF6] plastic above temperature, transforms from one another lies (aelm.202101415). topological polar textures (chiral walls, vortices, skymions). Anna Morozovska numerical Landau–Ginzburg–Devonshire approach predict flexoelectricity-induced formation skyrimion near surface epitaxially strained PbZr0.6Ti0.4O3 (aelm.202100386). Shihao Zhuang, Editor Jiamian Hu flux-closure/anti-flux-closure arrays PbZr0.52Ti0.48O3 nanotubes, phase-field simulations incorporate tension (aelm.202200132). Vincent Garcia find chirality due particular arrangement epitaxial BiFeO3 (aelm.202101155). Eleven strain, entropy. The Laurent Bellaiche presents engagingly simple graphical method establishing symmetry-allowed coupling, magnetically changes (aelm.202100639). Karin Rabe experimental theoretical strategies discovering materials electrically or states symmetries, andbetween antipolar (aelm.202200146). Shujun particularly piezoelectric voltage coefficient textured ceramics PbSc1/2Nb1/2O3-PbZrO3-PbTiO3 (aelm.202100919). Jiagang Wu challenges associated stability tetragonal lead-free piezoelectrics (K,Na)NbO3 (aelm.202100257). Nian Sun describes thin-film sensors applications biology (aelm.202200013). Jeffery McCord employ time-resolved optical imaging study interaction acoustic waves (aelm.202200033). Jun-Ming Liu rotation aysmmetric vortices Fe4N nanodots PMN-PT substrates (aelm.202100561). Ming strain transitions membrane shift ferromagnetic resonance Co/Pt multilayer transferred (aelm.202100923). Caroline Ross strain-mediated vertically aligned nanocomposite YFeO3-CoFe2O4, free deform along substrate normal direction (aelm.202200036). anomalously Z-type hexagonal ferrite but not multiferroic (aelm.202101294). Emmanuel Defay co-author Alvar Torelló quite some detail growing number prototype coolers electrocaloric (aelm.202101031); describing devices rather materials, paper differs Issue. Two experiments Paul Evans how BaTiO3/CaTiO3 superlattice optically excited such experiences differ corresponding when (aelm.202101051). Marin Alexe Hang-Bo photoconductivity SrTiO3 oxygen vacancies interface (aelm.202100665). Five metrology. Massimo Ghidini, Neil Mathur, provide explanation favourite (photoemission electron microscopy force microscopy) representative drawn primarily (aelm.202200162). Marty Gregg led suggest potential gradient better technique known as charge (aelm.202101384). Bryan Huey piezoresponse map nucleation sites growth patterns PbZr0.2Ti0.8O3 (aelm.202101389). Dennis Meier explores behaviour response a.c. voltages d.c. (aelm.202100996). Beatriz Noheda spin Hall magnetoresistance antiferromagnetic antiphase boundaries CaFe2O4 (aelm.202100963); magnetism without ferrroelectricity, Even just quick scan inspiration enter next research related breadth research, its technical content, represent impressive foundation build.