Journal ArticleDOI
Anomalous Paramagnetism of Copper Acetate
Brebis Bleaney,K. D. Bowers +1 more
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In this article, the paramagnetic resonance spectrum of copper acetate is anomalous in that it resembles that of an ion of spin 1, and its intensity decreases as the temperature is lowered.Abstract:
The paramagnetic resonance spectrum of copper acetate is anomalous in that it resembles that of an ion of spin 1, and its intensity decreases as the temperature is lowered. The latter is correlated with the decreasing susceptibility found by Guha (1951). The following hypotheses are suggested: (1) the crystalline field acting on each copper ion is similar to that in other salts such as the Tutton salts; (2) isolated pairs of copper ions interact strongly through exchange forces, each pair forming a lower singlet state and an upper triplet state, the latter only being paramagnetic. On this basis both the fine structure and the hyperfine structure of the spectrum have a simple explanation, and the theory also predicts a small initial splitting of the triplet state of the same order as that found experimentally. The unit cell of the crystal contains two differently oriented pairs of ions, and, using an empirical value for the exchange parameter, fair agreement with the susceptibility measurements of Guha is obtained.read more
Citations
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Journal ArticleDOI
The electronic properties and stereochemistry of mono-nuclear complexes of the copper(II) ion
B.J. Hathaway,D.E. Billing +1 more
Journal ArticleDOI
Dinuclear Complexes with Predictable Magnetic Properties
TL;DR: In this article, the authors proposed a method for tuning the magnitude of the interaction through a given bridging network by modifying the nature of the terminal ligands, which, in some way, play the role of adjusting screws.
Book ChapterDOI
Electron Spin Resonance of Transition Metal Complexes
B.A. Goodman,J.B. Raynor +1 more
TL;DR: There have been many reviews and books on electron spin resonance (ESR) and several on transition metal ions as discussed by the authors, and many of these publications have been written by physicists or theoreticians and are very comprehensive.
Journal ArticleDOI
Paramagnetic Resonance II
K D Bowers,J Owen +1 more
TL;DR: In this article, paramagnetic resonance data are collected together for crystalline solids containing ions of the transition groups, and those parts of the theory necessary for an understanding of the results are presented in a fairly simple way.
References
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Journal ArticleDOI
Interaction Between the d Shells in the Transition Metals
TL;DR: In this paper, it is shown that the spin coupling between the incomplete $d$ shells and the conduction electrons leads to a tendency for a ferromagnetic alignment of $d $ spins.
Journal ArticleDOI
Antiferromagnetism. Theory of Superexchange Interaction
TL;DR: In this article, the general formalism of Kramers indicating the existence of superexchange interaction has been reduced, under simplifying assumptions, to the point where actual formulas for the interaction can be written down directly in terms of spin operators, with certain exchange and transition integrals as parameters.
Journal ArticleDOI
Anomalous paramagnetism and exchange interaction in copper acetate
B. Bleaney,K.D. Bowers +1 more
TL;DR: Anomalous paramagnetism and exchange interaction in copper acetate have been studied in this article, where the authors propose a method to detect anomalous paramagnetic properties of the metal.
Journal ArticleDOI
On the theory of paramagnetic relaxation
TL;DR: In this article, it was shown that the spin relaxation time will always be small enough to justify the use of the thermodynamic relaxation theory of Casimir and DuPre, which is at variance with the theory of Kronig and Bouwkamp.
Journal ArticleDOI
Paramagnetic Resonance Absorption of Microwaves
TL;DR: In this paper, the results indicate that paramagnetic resonance is a promising new method of investigating the orbital properties of these organic radicals and evidence has been found in copper acetate for the simultaneous transition of electrons in neighboring ions with the absorption of a single quantum.