Abstract
AbstractThe linear optical birefringence of the iron‐group difluorides (rutile‐type) has been determined between 5 and 700 K. A magnetic contribution to the birefringence occurs during the ordering of the antiferromagnetic compounds MnF2, FeF2, CoF2, and the weak ferromagnetic NiF2; the linear magnetic birefringence (LMB) can be well separated from the temperature dependent natural optical anisotropy. Both the magnetic short‐range as well as the long‐range order contribute to the LMB. The temperature derivative of the LMB follows the course of the magnetic specific heat to a very good degree. It is shown that this proportionality is to be expected if all spin pair correlation functions exhibit the same temperature behaviour. Whether this condition is valid for the lattice distortions is discussed using the existing structural data. Assuming the observed LMB is mainly due to spontaneous lattice distortions, the influence of the fluorine parameter seems to play an important role.
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.
