Studies of the Room-Temperature Multiferroic Pb(Fe0.5Ta0.5)0.4(Zr0.53Ti0.47)0.6O3: Resonant Ultrasound Spectroscopy, Dielectric, and Magnetic Phenomena

摘要: Recently, lead iron tantalate/lead zirconium titanate (PZTFT) was demonstrated to possess large, but unreliable, magnetoelectric coupling at room temperature. Such large would be desirable for device applications reproducibility also critical. To better understand the coupling, properties of all 3 ferroic order parameters, elastic, electric, and magnetic, believed present in material across a range temperatures, are investigated. In high temperature elastic data, an anomaly is observed orthorhombic mm2 tetragonal 4mm transition, Tot = 475 K, softening trend as increased toward 1300 where known become cubic. Thermal degradation makes it impossible measure behavior up this temperature, however. low region, there anomalies near ≈40 K 160–245 K. The former interpreted being due magnetic ordering transition latter hysteretic regime mixed rhombohedral structures. Electrical data collected below show remarkably similar ranges data. These observations used suggest that three parameters PZTFT strongly coupled.