Low-temperature study of the susceptibility in the anisotropic spin glass Fe2TiO5

Abstract
The authors study the susceptibility of the anisotropic spin glass Fe2TiO5 below 1K. An unusual contribution to the magnetic susceptibility is revealed by an increase in the susceptibility as temperature is decreased. This increase is attributed to 'loose' spins which, due to the frustration in this system, experience zero internal field and contribute a Curie-Weiss term to the susceptibility. This contribution is anisotropic in nature.