Exchange Interactions between Pairs of Differing Magnetic Spins in Heteropoly Complexes
- 15 May 1972
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 56 (10) , 4917-4923
- https://doi.org/10.1063/1.1676969
Abstract
Coupled pairs of differing magnetic spins in tungsto-heteropoly complexes have been investigated by studying the magnetic susceptibility over the temperature range 2–300°K. The two sites of the magnetic ions are surrounded by oxygen ions in octahedral and tetrahedral coordinations with one oxygen ion in common. The ions studied were Co2+, Co3+, and Fe3+ in a total of six combinations on the two sites, offering a unique set of symmetries and ions for examining super-exchange effects. A closed form for the susceptibility has been obtained on assuming the spin Hamiltonian H=β (g1S1+g2S2)· H-JS1· S2, allowing for the possibility of g1≠ g2, S1≠ S2. Fitted values of J/k range from −6 to −70°K depending on the combinations of ions. The experimental agreement with the spin Hamiltonian for all cases studied is satisfactory for this system.Keywords
This publication has 10 references indexed in Scilit:
- Theory of Magnetic Exchange Interactions:Exchange in Insulators and SemiconductorsPublished by Elsevier ,2008
- New fundamental type of inorganic complex: hybrid between heteropoly and conventional coordination complexes. Possibilities for geometrical isomerisms in 11-, 12-, 17-, and 18-heteropoly derivativesJournal of the American Chemical Society, 1970
- Energy Levels of Chromium Ion Pairs in RubyPhysical Review B, 1969
- A New General Structural Category of Heteropolyelectrolytes. Unusual Magnetic and Thermal Contraction Phenomena1Journal of the American Chemical Society, 1966
- Technique for Determining Spin-Lattice Relaxation TimesReview of Scientific Instruments, 1965
- The Magnetic Properties of Transition Metal ComplexesPublished by Wiley ,1964
- Exchange Coupling Between Three Iron Ions in Two Organic MoleculesReviews of Modern Physics, 1953
- Anomalous paramagnetism of copper acetateProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1952
- On the Paramagnetic Susceptibilities of Some Polynuclear Complex SaltsJournal of the Physics Society Japan, 1950
- The structure and formula of 12-phosphotungstic acidProceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1934