Abstract
Magnetic susceptibility and X- and Q-band EPR studies are reported for the Fe 2+ spin transition compound (Fe( PM-PEA) 2(NCS) 2) in powder form. An exceptionally large thermal hysteresis loop, about 60 K, has been found by both techniques. The EPR studies have been carried out on compound doped with Mn 2+ (0.1‰ of Mn/Fe). An original EPR spectra simulation program has been elaborated in order to yield data on the structural modifications accompanying the spin transition. The fine structure parameters obtained by simulations in the high-spin state of Fe 2+, D=460, E=25, and in the low-spin state of this ion, D=235, E=20 (in 10 −4 cm −1) confirm that the spin transition is accompanied by a crystalline phase transformation. The Mn 2+ EPR spectra in the spin transition region can be convincingly fitted by linear combinations of the spectra observed in the high-spin and low-spin states of Fe 2+, indicating that the spin transition occurs in domains of like-spin ions.
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.
