Title:
ヒステリシス効果による磁性材料の加熱
Document Type and Number:
Japanese Patent JP4949556
Kind Code:
B2
Abstract:
A magnetic material having a magnetic heating efficiency of at least 4.5x10-8 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 5x108 A/m.s, and the frequency of the applied filed is at least 20 kHz. The ideal magnetic material is characterized by a perfectly rectangular hysteresis loop, i.e. loop squareness of 1, with coercivity of 25 kA/m or less and high saturation magnetization. Preferably the magnetic material has a predominately cubic magnetic crystalline anisotropy. Preferably the magnetic material is a substituted magnetite (Fe3O4) or gamma-ferric oxide (gammaFe2O3) crystalline lattice in which some of the iron atoms in that crystalline lattice have been substituted for one or more alternate metals atoms. Desirably, the metal atom is a member of the group: cobalt, zinc, nickel, manganese, magnesium, copper, chromium, gallium, cadmium.
Inventors:
Gray, Bruce Nathaniel
Stephen Keith, Jones
Raffaele, Camarano
Stephen Keith, Jones
Raffaele, Camarano
Application Number:
JP2000603053A
Publication Date:
June 13, 2012
Filing Date:
March 03, 2000
Export Citation:
Assignee:
Sutex Medical Limited
International Classes:
H01F1/36; A61K9/10; A61K9/50; A61K33/24; A61K33/26; A61K41/00; A61K47/32; A61K47/36; A61K47/42; A61K51/00; A61M31/00; A61M36/04; A61N1/40; A61N2/00; A61N2/10; A61N5/10; A61P35/00; H05B6/10
Domestic Patent References:
| JP9219017A | ||||
| JP6092640A | ||||
| JP2000503879A |
Foreign References:
| WO1997043005A1 |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Arihara Koichi
Matsushima Tetsuo