Title :
Study on optical, dielectric, and magnetic properties of Ba2MnGe2O7 ceramics
Author :
Su, Jie ; Guo, Yunfeng ; Zhang, Junting ; Sun, Hui ; He, Ju ; Lu, Xiaomei ; Lu, Chaojing ; Zhu, Jinsong
Author_Institution :
Phys. Dept., Nanjing Univ., Nanjing, China
Abstract :
Ba2MnGe2O7 ceramics were prepared by the solid-state reaction method. The prepared powders had a good photon absorption performance in the range of 300-800 nm with the direct band gap energy of 3.1 eV. A dielectric relaxation behavior at low temperature is observed which may come from the dipolar effects associated with the changeable valence of transition metal ions. In addition, antiferromagnetic order was also observed bellow 5.1 K.
Keywords :
antiferromagnetic materials; barium compounds; ceramics; dielectric materials; dielectric relaxation; energy gap; magnetisation; manganese compounds; powder technology; powders; ultraviolet spectra; visible spectra; Ba2MnGe2O7; antiferromagnetic materials; band gap energy; ceramics; dielectric properties; dielectric relaxation; dipolar effects; magnetic properties; magnetisation; optical properties; photon absorption spectra; powders; solid-state reaction method; ultraviolet-visible spectra; wavelength 300 nm to 800 nm; Absorption; Ceramics; Dielectrics; Photonics; Powders; Temperature distribution; Temperature measurement; Ba2MnGe2O7 ceramics; UV-Vis absorption; antiferromagnetic order; dielectric relaxation;
Conference_Titel :
Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp
Conference_Location :
Aveiro
Print_ISBN :
978-1-4673-2668-1
DOI :
10.1109/ISAF.2012.6297818
