Magnetic resonance study of the Fe+(I) center in SrCl2 single crystals

H. Vrielinck, F. Callens, P. Matthys, S. V. Nistor, D. Ghica, and D. Schoemaker
Phys. Rev. B 64, 024405 – Published 11 June 2001
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Abstract

An Fe+-type center with axial 〈001〉 symmetry has been studied by electron nuclear double resonance (ENDOR) in the microwave X and Q bands. The Fe+(I) center is produced only after irradiation with x or γ rays at 80 K of SrCl2:Fe2+ crystals grown in a Cl2 atmosphere. It has a 3d74FΓ8 ground state with spin S=32. As shown by the correlated analysis of the ENDOR data and electron paramagnetic resonance superhyperfine structure, the Fe+ ion is situated in the center of a tetragonally compressed cube of eight nearest Cl ions. The simplest model of the Fe+(I) center, compatible with the magnetic resonance results, consists of an interstitial Fe+ ion with two substitutional monovalent cations, very likely K+ ions, in two opposite nearest-neighbor Sr2+ sites along the tetragonal axis of the center.

  • Received 18 December 2000

DOI:https://doi.org/10.1103/PhysRevB.64.024405

©2001 American Physical Society

Authors & Affiliations

H. Vrielinck, F. Callens, and P. Matthys

  • Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, B-9000 Ghent, Belgium

S. V. Nistor and D. Ghica

  • National Institute of Material Physics, POB MG-7 Magurele, 76900 Bucharest, Romania

D. Schoemaker

  • Physics Department, University of Antwerp (UIA), Universiteitsplein 1, B-2610 Antwerpen (Wilrijk), Belgium

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Vol. 64, Iss. 2 — 1 July 2001

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