Magnetic Susceptibility for $Ca{V}_4{O}_9$

Abstract

We examine experimental magnetic susceptibility ${\chi }^{tot}(T)$ for CaV${}_4$O${}_9$ by fitting with fitting function $\alpha {\chi }^{mag}(T)+c$. The function ${\chi }^{mag}(T)$ is a power series of 1/T and the lowest order term is fixed as $C/T$, where $C$ is the Curie constant as determined by the experimental $g$-value (g=1.96). Fitting parameters are $\alpha$, $c$ and expansion coefficients except for the first one in ${\chi }^{mag}(T)$. We determine $\alpha$ and $c$ as $\alpha \simeq$ 0.73 and $c\simeq$ 0 for an experimental sample. We interpret $\alpha$ as the volume fraction of CaV${}_4$O${}_9$ in the sample and ${\chi }^{mag}(T)$ as the susceptibility for the pure CaV${}_4$O${}_9$. The result of $\alpha \ne 1$ means that the sample includes nonmagnetic components. This interpretation consists with the result of a perturbation theory and a neutron scattering experiment.

4pages, 4figures

References in corpus (1)

• Orbital Order Effect of Two-Dimensional Spin Gap System for CaV4O9

Cited by in corpus (2)

• Sr2V3O9 and Ba2V3O9: quasi one-dimensional spin-systems with an anomalous low temperature susceptibility
• Ab Initio Calculation of Spin Gap Behavior in CaV4O9