Magnetic particles and method of producing the same and magnetic recording medium

A method of producing magnetic particles having a CuAu— or Cu3Au-type ferromagnetic ordered alloy phase, comprising:

• preparing alloy particles capable of forming a CuAu— or Cu3Au-type ferromagnetic ordered alloy phase;
• and annealing the alloy particles in a solvent.

Magnetic particles having a CuAu— or Cu3Au-type ferromagnetic ordered alloy phase, wherein the particles are produced by preparing alloy particles capable of forming a CuAu— or Cu3Au-type ferromagnetic ordered alloy phase, and annealing the alloy particles in a solvent.

A magnetic recording medium comprising a support and a magnetic layer provided on the support, wherein the magnetic layer contains magnetic particles having a CuAu— or Cu3Au-type ferromagnetic ordered alloy phase, the surface of the magnetic particles being in contact with an organic substance.

A magnetic recording medium comprising a support and a magnetic layer which is provided on the support and contains magnetic particles having a CuAu— or Cu3Au-type ferromagnetic ordered alloy phase, wherein

• the magnetic layer is formed by preparing alloy particles capable of forming a CuAu— or Cu3Au-type ferromagnetic ordered alloy phase, then converting the alloy particles to magnetic particles by means of annealing the alloy particles while contained in a solvent, and applying a coating liquid containing the magnetic particles, a binder, a polar solvent and a nonpolar solvent on the support.

A magnetic recording medium comprising a support and a magnetic layer which is provided on the support and contains magnetic particles capable of forming a CuAu— or Cu3Au-type ferromagnetic ordered alloy phase, the magnetic layer further comprising a binder, a polar solvent, and a nonpolar solvent.