Abstract
Temperature dependent neutron powder diffraction has been used to study the β″ Na(H2O, H3O+) ferrite compound from room temperature to 830°C. The following phenomena were observed: 1.(i) The existence of two superimposed magnetic modes, one ferromagnetic described with the propagation vector k = [0 0 0], the other one antiferromagnetic which is described with the propagation vector k = [0 032]. The antiferromagnetic (AF) model arrangement is in fact an extrapolation of Gorter's (AF) collinear model proposed for the potassium β-ferrite. The two magnetic modes are in agreement with the representation theory analysis.2.(ii) The existence of two transitions one at T = 250°C (of magnetic origin), the other one (of nuclear or magnetic origin) at T = 450°C.3.(iii) From the variation of cell parameters with temperature there is evidence of the complete desorption of water at T = 220°C.
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.
