Magnetic Properties of Solid Solution Co<I><SUB>x</SUB></I>Ni<SUB>1−<I>x</I></SUB>Cl<SUB>2</SUB>6H<SUB>2</SUB>O

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  • Magnetic Properties of Solid Solution CoxNi1-xCl26H2O
  • Magnetic Properties of Solid Solution C
  • Magnetic Properties of Solid Solution Co<sub><i>x</i></sub>Ni<sub>1-<i>x</i></sub>Cl<sub>2</sub>6H<sub>2</sub>O

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Abstract

The magnetic properties and the phase diagram of the solid solution CoxNi1−xCl26H2O are analyzed by using a model Hamiltonian with the mean field approximation. Our results are qualitatively in agreement with experimental ones. It is shown that the sublattice magnetization lies in a plane including both easy axes of two pure substances (ca-plane) and its direction varies smoothly over the whole range of the concentration x, not within a limited range of x as observed in K2MnxFe1−xF4 and CoxFe1−xCl22H2O. The feature is due to off diagonal terms in the Hamiltonian which come from the non-orthogonality of the easy axes of two pure substances CoCl26H2O and NiCl26H2O (∼65°). The characteristic features of the magnetization processes are also analyzed considering the fact that the second easy axis of CoCl26H2O does not lie within the ca-plane.

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