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EPR measurement of Cu2+-fe2+ exchange in FeSif6 · 6H20 at 4.2 K

Rubins, R. S. and De, Dilip Kumar (1985) EPR measurement of Cu2+-fe2+ exchange in FeSif6 · 6H20 at 4.2 K. J. Chern. Phys, 83 (9). pp. 4400-4404.

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Six inequivalent Cu2+ EPR spectra were observed at 4.2 K in single crystals of FeSiF 6 • 6H20. The estimated parametersgz ---2.38 and 8=40°, where 8 is the angle between the ionicz axis and the c axis, differ from those measured in crystals of similar structure. Thes~ differences have been explained in terms of an isotropic Cu2+ -Fe2+ exchange Hamiltonian JS1 • S2, with J = + (0.030 ± 0.003) em - 1 ' which gives a contribution gex = - 5.05 J sin2 e, where e is the angle between the external magnetic field and the z axis. Perpendicular to the c axis, an independent estimate of + 0.034 em -I for J was made from the low-field displacement of a satellite spectrum

Item Type: Article
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Medicine, Health and Life Sciences > School of Biological Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 27 Apr 2015 09:25
Last Modified: 27 Apr 2015 09:25

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