Ferromagnetism in ErTi₂Ga₄

Abstract

The magnetic properties of an intermetallic compound ErTi₂Ga₄ with the tetragonal (I4/mmm) structure was investigated. The magnetic measurements on the poly- and single crystalline specimens have shown that the compound is a ferromagnet with T_c of 10 K and the ordered magnetic moment (μ=9 μ_B/f.u.) parallel to the a-axis. It was found also that the magnetic isotherms of polycrystalline ErTi₂Ga₄ do not obey the Arrot's relationship (linearity between M² and H/M), which suggests that the coupling of the moment fluctuation is quite weak in this system.