MAGNETIC MATERIAL AND DEVICE

摘要

A magnetic material of an embodiment includes a plurality of magnetic metal particles, a plurality of columnar oxide particles, and a matrix phase. Each of the plurality of the magnetic metal particles includes at least one element selected from a first group consisting of Fe, Co, and Ni. Each of the plurality of the columnar oxide particles includes at least one oxide selected from a second group consisting of Al2O3, SiO2, and TiO2 and is in contact with the magnetic metal particle. The matrix phase has a higher electrical resistance than each of the plurality of the magnetic metal particles. The matrix phase surrounds the plurality of magnetic metal particles and the plurality of columnar oxide particles. In the magnetic material, 5 nm≦l≦L and 0.002≦L/R≦0.4 hold, where R represents a particle size of the magnetic metal particle, L represents a length of the columnar oxide particle, and l represents a breadth of the columnar oxide particle.

主权项

1. A magnetic material comprising:
a plurality of magnetic metal particles, each of the plurality of the magnetic metal particles including at least one element selected from a first group consisting of Fe, Co, and Ni; a plurality of columnar oxide particles, each of the plurality of the columnar oxide particles including at least one oxide selected from a second group consisting of Al2O3, SiO2, and TiO2, each of the plurality of the columnar oxide particles being in contact with the magnetic metal particle; and a matrix phase having a higher electrical resistance than each of the plurality of the magnetic metal particles, the matrix phase surrounding the plurality of magnetic metal particles and the plurality of columnar oxide particles,wherein
5 nm≦l≦L, and 0.002≦L/R≦0.4, where R represents a particle size of the magnetic metal particle, L represents a length of the columnar oxide particle, and l represents a breadth of the columnar oxide particle.