Magnetism of TiBe₂

Abstract

The temperature dependence of the magnetic susceptibility and the magnetization curve in the ground state of a nearly ferromagnetic itinerant electron system TiBe₂ are discussed based on the unified theory of spin fluctuations developed by Moriya and Takahashi. (1) A maximum in χ(T) at around 10 K and the Curie-Weiss law of χ(T) above about 30 K, and (2) a maximum in M⁄H and a good linearity of the Arrott plot under higher fields at low temperatures can be explained consistently with semi-quantitative success by using a model density of states introduced by taking account of the results of band structure calculations.