The effect of weak exchange interaction on electron paramagnetic resonance in dichloro bis-o-phenylene bis-dimethyl arsino nickelate(III) chloride

B. L. Ramakrishna; P. T. Manoharan

doi:10.1080/00268978400101061

The effect of weak exchange interaction on electron paramagnetic resonance in dichloro bis-o-phenylene bis-dimethyl arsino nickelate(III) chloride

B. L. Ramakrishna, P. T. Manoharan

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The observation of a single exchange-narrowed E.P.R. line in [NiCl₂-(diars)₂]Cl, a monoclinic crystal with two magnetically inequivalent sites, is shown to be due to g-averaging and hence the concentration dependence of the g-tensor is explained. The lineshape analysis and the angular dependent linewidth data are used to evaluate various Fourier components of the spin-correlation function using Kubo-Tomita theory. The total linewidth is partitioned into secular and non-secular contributions of the broadening mechanisms—dipolar and hyperfine interactions. The angular dependence of the " 10/3 effect " observed in X- and 0-bands could not be predicted by either the Blume-Hubbard or the Anderson-Weiss model. In the 7 regime [ℋz≈12 500 G or 3200 G> ℋex≈ 700 G> ℋdipolar, ℋhyperfine f«70 G] of [NiCl₂(diars)₂]Cl there is paucity of both experimental and theoretical studies. Taylor & Francis Group, LLC.

Original language	English (US)
Pages (from-to)	65-80
Number of pages	16
Journal	Molecular Physics
Volume	52
Issue number	1
DOIs	https://doi.org/10.1080/00268978400101061
State	Published - 1984
Externally published	Yes

ASJC Scopus subject areas

Biophysics
Molecular Biology
Physical and Theoretical Chemistry
Condensed Matter Physics

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title = "The effect of weak exchange interaction on electron paramagnetic resonance in dichloro bis-o-phenylene bis-dimethyl arsino nickelate(III) chloride",

abstract = "The observation of a single exchange-narrowed E.P.R. line in [NiCl2-(diars)2]Cl, a monoclinic crystal with two magnetically inequivalent sites, is shown to be due to g-averaging and hence the concentration dependence of the g-tensor is explained. The lineshape analysis and the angular dependent linewidth data are used to evaluate various Fourier components of the spin-correlation function using Kubo-Tomita theory. The total linewidth is partitioned into secular and non-secular contributions of the broadening mechanisms—dipolar and hyperfine interactions. The angular dependence of the {"} 10/3 effect {"} observed in X- and 0-bands could not be predicted by either the Blume-Hubbard or the Anderson-Weiss model. In the 7 regime [ℋz≈12 500 G or 3200 G> ℋex≈ 700 G> ℋdipolar, ℋhyperfine f«70 G] of [NiCl2(diars)2]Cl there is paucity of both experimental and theoretical studies. Taylor & Francis Group, LLC.",

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year = "1984",

doi = "10.1080/00268978400101061",

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T1 - The effect of weak exchange interaction on electron paramagnetic resonance in dichloro bis-o-phenylene bis-dimethyl arsino nickelate(III) chloride

AU - Ramakrishna, B. L.

AU - Manoharan, P. T.

PY - 1984

Y1 - 1984

N2 - The observation of a single exchange-narrowed E.P.R. line in [NiCl2-(diars)2]Cl, a monoclinic crystal with two magnetically inequivalent sites, is shown to be due to g-averaging and hence the concentration dependence of the g-tensor is explained. The lineshape analysis and the angular dependent linewidth data are used to evaluate various Fourier components of the spin-correlation function using Kubo-Tomita theory. The total linewidth is partitioned into secular and non-secular contributions of the broadening mechanisms—dipolar and hyperfine interactions. The angular dependence of the " 10/3 effect " observed in X- and 0-bands could not be predicted by either the Blume-Hubbard or the Anderson-Weiss model. In the 7 regime [ℋz≈12 500 G or 3200 G> ℋex≈ 700 G> ℋdipolar, ℋhyperfine f«70 G] of [NiCl2(diars)2]Cl there is paucity of both experimental and theoretical studies. Taylor & Francis Group, LLC.

AB - The observation of a single exchange-narrowed E.P.R. line in [NiCl2-(diars)2]Cl, a monoclinic crystal with two magnetically inequivalent sites, is shown to be due to g-averaging and hence the concentration dependence of the g-tensor is explained. The lineshape analysis and the angular dependent linewidth data are used to evaluate various Fourier components of the spin-correlation function using Kubo-Tomita theory. The total linewidth is partitioned into secular and non-secular contributions of the broadening mechanisms—dipolar and hyperfine interactions. The angular dependence of the " 10/3 effect " observed in X- and 0-bands could not be predicted by either the Blume-Hubbard or the Anderson-Weiss model. In the 7 regime [ℋz≈12 500 G or 3200 G> ℋex≈ 700 G> ℋdipolar, ℋhyperfine f«70 G] of [NiCl2(diars)2]Cl there is paucity of both experimental and theoretical studies. Taylor & Francis Group, LLC.

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JF - Molecular Physics

IS - 1

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The effect of weak exchange interaction on electron paramagnetic resonance in dichloro bis-o-phenylene bis-dimethyl arsino nickelate(III) chloride

Abstract

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