Magnetic field induced polarization and magnetoelectric effect of Ba0.8Ca0.2TiO3-Ni0.2Cu0.3Zn0.5Fe2O4 nanomultiferroic J. Appl. Phys. 113, 17C731 (2013); 10.1063/1.4795820 O 17 and N 93 b NMR investigation of magnetoelectric effect in Pb ( Fe 1 / 2 Nb 1 / 2 ) O 3
We have investigated the magnetic and dielectric properties of A2CoSi2O7 (A=Ca, Sr, and Ba) crystals with a two-dimensional network of CoO4 and SiO4 tetrahedra connected with each other through the corners. In Ca2CoSi2O7, a weak ferromagnetic transition occurs at 5.7 K, where the dielectric constant parallel to the c axis shows a concomitant anomaly. The large magnetocapacitance effect is observed below 5.7 K; ∆ε(H)/ε(0) ≡ [ε(H) − ε(0)]/ε(0) reaches 13 % at 5.1 K. These results indicate a strong coupling between the magnetism and dielectricity in Ca2CoSi2O7. Sr2CoSi2O7 shows a similar magnetoelectric behavior to that of Ca2CoSi2O7. In contrast, in Ba2CoSi2O7, which has the different arrangement of SiO4 and CoO4 tetrahedra from that of Ca2CoSi2O7, the magnetocapacitance is hardly observed. The key for the magnetocapacitance effect of A2CoSi2O7 lies in the quasi-two-dimensional crystal structure.
We have investigated temperature and magnetic-field dependence of dielectric properties in the orthorhombic GdMnO3 single crystal which is located near the phase boundary between the ferroelectric/spiral-antiferromagnetic phase and the paraelectric/A-typeantiferromagnetic one. In this compound, strong phase competition between these two phases results in a unique phase diagram with large temperature and magnetic-field hystereses. Based on the phase diagram, we have successfully demonstrated the persistent and reversible phase switching between them by application of magnetic fields.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.