Nanoheterostructured permanent magnet and method for producing the same

A nanoheterostructured permanent magnet comprising a hard magnetic material and a soft magnetic material, wherein the hard magnetic material and the soft magnetic material are each comprised of an inorganic component of which one inorganic component is a matrix, and of which the other inorganic component is three-dimensionally and periodically arranged in the matrix, in a shape selected from the group consisting of a spherical shape, a columnar shape, and a gyroid shape,

• wherein the hard magnetic material is a noble metal-based magnet,
• wherein the soft magnetic material is at least one selected from the group consisting of iron, iron-cobalt alloys, iron-nickel alloys, iron-noble metal alloys, silicon steel, Sendust, and soft ferrite,
• the nanoheterostructured permanent magnet having a three-dimensional periodic structure whose average value of one unit length of a repeated structure is 1 nm to 100 nm, and
• wherein a volume of part of a region comprising the soft magnetic material accounts for 50% by volume or more of the total volume of the soft magnetic material, the part satisfying a condition that a distance from an interface with the hard magnetic material is 10 nm or less.