Colossal Permittivity: The Fundamental Mechanism Behind Colossal Permittivity in Oxides (Adv. Mater. 51/2019)

Electron-pinned defect-dipoles for high-performance colossal permittivity materials.

The immense potential of colossal permittivity (CP) materials for use in modern microelectronics as well as for high-energy-density storage applications has propelled much recent research and development. Despite the discovery of several new classes of CP materials, the development of such materials with the required high performance is still a highly challenging task. Here, we propose a new el...

Retraction: Origin of colossal permittivity in (In1/2Nb1/2)TiO2via broadband dielectric spectroscopy.

Retraction of 'Origin of colossal permittivity in (In1/2Nb1/2)TiO2via broadband dielectric spectroscopy' by Xiao-gang Zhao et al., Phys. Chem. Chem. Phys., 2015, 17, 23132-23139.

Colossal Magnetoresistance in Ce Doped Manganese Oxides

Crystalline Structure, Defect Chemistry and Room Temperature Colossal Permittivity of Nd-doped Barium Titanate

Dielectric materials with high permittivity are strongly demanded for various technological applications. While polarization inherently exists in ferroelectric barium titanate (BaTiO3), its high permittivity can only be achieved by chemical and/or structural modification. Here, we report the room-temperature colossal permittivity (~760,000) obtained in xNd: BaTiO3 (x = 0.5 mol%) ceramics derive...

Colossal magnetocapacitance and colossal magnetoresistance in HgCr2S4.

We present a detailed study of the dielectric and charge transport properties of the antiferromagnetic cubic spinel HgCr2S4. Similar to the findings in ferromagnetic CdCr2S4, the dielectric constant of HgCr2S4 becomes strongly enhanced in the region below 60-80 K, which can be ascribed to polar relaxational dynamics triggered by the onset of ferromagnetic correlations. In addition, the observat...