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MA: Fachverband Magnetismus
MA 52: Poster II
MA 52.62: Poster
Thursday, March 15, 2018, 15:00–18:00, Poster C
low-temperature magnetoelectric effect in multiferroic h-Yb1-xHoxMnO3 — •gang qiang1, yifei fang2, and jincang zhang2 — 1Experimentelle Physik 2, Technische Universitat Dortmund, 44221 Dortmund, Germany — 2Materials Genome Institute and Department of Physics, Shanghai University, Shanghai 200444, China
Hexagonal RMnO3 as a group of important multiferroic materials, attracted much attention during the last few decades. Much work, by now, has been done on their magnetic structure, magnetic phase diagrams as well as the high temperature ferroelectric transition, but few investigation has been carried out to study the low-temperature ferroelectric properties nor its interaction with the magnetic transitions. In this work, we carried out a detailed study of the low-temperature ferroelectricity, magnetic property as well as the ME effect in bulk Yb1-xHoxMnO3 (0<=x<=0.6, Δx=0.2). In h-YbMnO3 (x=0), ferroelectric polarization is found around 43.5 K and is supposed to be closely related with the structure change, and defects in the material is supposed to be responsible for the asymmetry of the P-T curves under opposite poling filed. In the Ho-doped samples (x>0), two-dimensional antiferromagnetic (AFM) perturbation as well as the second AFM ordering are observed. Substitution of Yb by Ho atoms shows great influences on the electric property and the low-doping concentration tend to be more favorable for the enhancement of electric polarization.