title: A multifrequency EPR study of Fe2+ and Mn2+ ions in a ZnSiF(6).6H2O single crystal at liquid-helium temperatures.
abstract: A liquid-helium temperature study of Fe2+ and Mn2+ ions has been carried out on a single crystal of Fe2+-doped ZnSiF(6).6H2O at 5-35K at 170, 222.4 and 333.2G Hz. The spectra are found to be an overlap of two magnetically inequivalent Fe2+ ions, as well as that of an Mn2+ ion. From the simulation of the EPR line positions for the Fe2+ (d6, S=2) ion the spin-Hamiltonian parameters were estimated for the two inequivalent Fe2+ ions at the various temperatures. From the relative intensities of lines the absolute sign of the fine-structure parameters have been estimated. In addition, the fine-structure and hyperfine-structure spin-Hamiltonian parameters for the Mn2+ ion, present as impurity at interstitial sites, were estimated from the hyperfine allowed and forbidden line positions. The particular virtues of such a single-crystal study vs. that on powders are noted.
authors.affiliation: Physics Department, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, Quebec, Canada H3G 1M8. skmisra@alcor.concordia.ca
authors.forename: Sushil K
authors.initials: SK
authors.lastname: Misra
authors.forename: Stefan
authors.initials: S
authors.lastname: Diehl
authors.forename: Dmitry
authors.initials: D
authors.lastname: Tipikin
authors.forename: Jack H
authors.initials: JH
authors.lastname: Freed
mesh_terms: D000465:Algorithms; D003080:Cold Temperature; D003460:Crystallization; D004574:Electromagnetic Fields; D004578:Electron Spin Resonance Spectroscopy; D006371:Helium; D007501:Iron / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D017655:Silicon Compounds / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
chemical_list: D017655:Silicon Compounds; D006371:Helium; D008345:Manganese; D007501:Iron; D015032:Zinc
references.citation: J Am Chem Soc. 2004 Jun 2;126(21):6574-5
references.pmid: 15161284
references.citation: J Magn Reson. 2006 Feb;178(2):174-83
references.pmid: 16226910
references.citation: Inorg Chem. 1999 Jul 12;38(14):3321-3328
references.pmid: 11671067
references.citation: Inorg Chem. 2000 Jan 24;39(2):281-8
references.pmid: 11272536
references.citation: Magn Reson Chem. 2005 Nov;43 Spec no.:S256-66
references.pmid: 16235203
references.citation: Inorg Chem. 2006 Jun 12;45(12):4695-705
references.pmid: 16749833