Structural, magnetic, electrical and electrochemical properties of SrCo02.5, Sr9Co2Mn5O21 and SrMnO3 compounds
Özet
SrCo1-xMnxO3-d (0 <= x <= 1) were synthesized by conventional solid state reaction method. We found that Mn substitution hinders the decomposition of carbonate at 900 degrees C and increases the synthesis temperature of SrCo1-xMnxO3-d to 1200 degrees C. Three different main phases emerge as the Mn content is increased; SrCoO2.5, Sr9Co2Mn5O21 and SrMnO3. Structural properties of the samples were investigated by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, x-ray diffraction (XRD) and scanning electron microscopy (SEM). Valance states of the transition metal (TM) ions were estimated based on lattice parameters and ionic radii of TM ions. High temperature resistivity measurements show hysteresis upon heating and cooling and is attributed to oxygen release without any endothermic/exothermic activity. The spin configurations of Co and Mn ions in SrCoO2.5, Sr9Co2Mn5O21. and SrMnO3 were estimated by Curie-Weiss fitting of X-T curves. Electrochemical measurements show two anodic/cathodic peaks indicating two main types of oxygen sites in the unit cell.
Anahtar kelimeler
Atıf için künye
DEMİREL, S., Öz, E., ALTIN, S., BAYRİ, A., Baglayan, O., ALTIN, E., & AVCI, S. (2017). Structural, magnetic, electrical and electrochemical properties of SrCo02.5, Sr9Co2Mn5O21 and SrMnO3 compounds. Ceramics International, 43(17), 14818–14826. https://doi.org/10.1016/j.ceramint.2017.07.230
BibTeX
@article{demirel2017-80047,
author = {DEMİREL, SONER and Öz, Erdinç and ALTIN, SERDAR and BAYRİ, ALİ and Baglayan, O. and ALTIN, EMİNE and AVCI, SEVDA},
title = {Structural, magnetic, electrical and electrochemical properties of SrCo02.5, Sr9Co2Mn5O21 and SrMnO3 compounds},
journal = {Ceramics International},
year = {2017},
volume = {43},
number = {17},
pages = {14818--14826},
issn = {0272-8842},
doi = {10.1016/j.ceramint.2017.07.230},
url = {https://akademik.atauni.edu.tr/yayinlar/80047-structural-magnetic-electrical-and-electrochemical-properties-of-srco025}
}