Abstract
The double perovskite oxide Ba 2FeMoO 6 has a cubic structure with a 0=8.0747 Å, whereas Sr 2FeMoO 6 has a tetragonal symmetry with a 0=5.5729 Å and c 0=7.9077 Å. The unit-cell parameters of the strontium compound increase linearly on increasing the temperature, and the crystal symmetry changes into cubic in the paramagnetic phase (above the Curie temperature T C). Magnetization measurements show a ferrimagnetic behavior for both materials, with T C=345 K for Ba 2FeMoO 6 and T C=425 K for Sr 2FeMoO 6, respectively. As the temperature increases toward T C, Mössbauer spectra show line broadening and 1, 6 and 3, 4 linewidth difference because of anisotropic hyperfine field fluctuation. Temperature dependence of anisotropy energy is calculated from the relaxation rate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
