On the magnetism of Au4Ti, Au4V, Au4Cr, Au4Mn, Au8TiCr, and Au8VMn

It is pointed out that the energy decrease due to the magnetization of the spin is large in the ferromagnetic substances and that the energy decrease due to the formation of the antiferromagnetic disposition is large in the antiferromagnetic substances. The calculation is made for the energy decrease in the ferromagnetic state as a function of the number of d electrons. This calculation explains the paramagnetic Au4Ti, the weak ferromagnetic Au4V, and the ferromagnetic Au4Mn. The energy decrease for Au5 and Au3V2 is also calculated, and it is shown that ferromagnetism appears in the vicinity of Au4V. The calculation is made for the energy decrease in the antiferromagnetic state as a function of the number of d electrons. This calculation suggests that antiferromagnetism appears in Au4Cr. The anisotropy energies for Au4V and Au4Mn are calculated to be in agreement with the experimental result. It is shown that the magnetic moment in Au4Cr should be parallel to [001] direction. Finally, the magnetism of Au8...