Ferromagnetic element-substituted room-temperature multiferroic material and method for manufacturing same
AssigneeUnist (Ulsan National Institute of Science and Technology)
InventorsWook Jo, Jae Hyeon Cho
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Abstract
Disclosed is a ferromagnetic element-substituted room-temperature multiferroic material having ferromagnetism and ferroelectricity at room temperature, wherein the ferromagnetic element-substituted room-temperature multiferroic material includes a compound of chemical formula 1: <chemical formula 1> (Pb1-xMx)Fe1/2Nb1/2O3. In chemical formula 1, M represents a ferromagnetic element, and x represents a number greater than 0 and smaller than 1.
Claims12
A ferromagnetic element-substituted room-temperature multiferroic material comprising 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.
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.
Dependencies are inferred from the claim text.