Abstract
The magnetic properties of the ferrite Mn 0.25Zn 0.75Fe 2O 4 have been studied by Mössbauer spectroscopy and magnetisation measurements. Mössbauer spectra, obtained at low temperatures and large applied magnetic fields, showed that almost all Fe 3+ ions are in octahedral (B) sites and only about 2% of the Fe 3+ ions are in tetrahedral (A) sites. At 5 K about 16% of the B-site Fe 3+ ions have spins parallel to the A-site magnetisation, but when the temperature is raised to about 40 K, these spins are reversed. Some other B-site Fe 3+ ions show a large spin canting at 5 K and these ions are significantly affected by transverse relaxation at relatively low temperatures. A third group of B-site ions has negligible canting at low temperatures and these ions are only slightly affected by relaxation below 60 K. At low temperatures the material can be described as a cluster spin glass. Above 60 K part of the sample breaks up into superparamagnetic clusters whereas other parts remain ferrimagnetic.
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.
