Patent ID: 11958758
Assignee: UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 2:
3. A method for manufacturing a ferromagnetic element-substituted room-temperature multiferroic material, the method comprising:
mixing a lead oxide, an iron oxide, a niobium oxide, and a ferromagnetic element to form a mixture;
calcinating the mixture; and
sintering the mixture to form a room-temperature multiferroic material,
wherein the ferromagnetic element-substituted room-temperature multiferroic material comprises a compound of the following chemical formula 1:

(Pb1-xMx)Fe1/2Nb1/2O3,  <chemical formula 1>

where M represents a ferromagnetic element, and x is from 0.1 to 0.2,
wherein the room-temperature multiferroic material:
is composed of a single phase;
has a polycrystalline bulk shape; and
has an ABO3 perovskite structure,

wherein a material at A-site of the ABO3 perovskite structure is substituted by the ferromagnetic element so that 180-degreee superexchange interaction changes to 90-degree interaction,
wherein the room-temperature multiferroic material has a higher saturation magnetization and a higher magnetoelectric coefficient than that of PbFe1/2Nb1/2O3,
wherein the room-temperature multiferroic material has ferromagnetism and ferroelectricity.