Patent ID: 6599234
Filing Date: 2003-07-29
Classification: A61K,A61N,A61P

Abstract:
A magnetic material having a magnetic heating efficiency of at least 4.5Ã—10âˆ’8 J.m/A.g in a cyclic magnetic field where the product of the amplitude and frequency of the applied field is less than or equal to 5Ã—108 A/m.s, and the frequency of the applied field is at least 20 kHz and wherein (i) the magnetic material is a substituted magnetite (Fe3O4) or gamma ferric oxide (&ggr;-Fe2O3) crystalline lattice in which some of the iron atoms in that crystalline lattice have been substituted for one or more alternate metal atoms and (ii) the magnetic material has a predominantly cubic magnetocrystalline anisotropy.