Temperature dependence of Landau coefficients in Lu(Co1−xGax)2

Abstract High-field magnetization was measured for typical itinerant-electron metamagnets Lu(Co1−xGax)2 with x=0.06 and 0.07 at temperatures from 4.2 to 300 K in pulsed magnetic fields up to 45 T . Landau coefficients A(T), B(T) and C(T) were determined by fitting measured M–H curves to the equation, H=A(T)M+B(T)M3+C(T)M5. The temperature dependence of the Landau coefficients was well explained by the theory of the metamagnetic transition considering the magnetovolume effect.