One object of the present invention is to provide an electronic component less prone to migration of impurity atoms between a conductor and an external electrode. A coil component as an electronic component includes a base body, a conductor, a first external electrode electrically connected to one end portion of the conductor, a second external electrode electrically connected to the other end portion of the conductor, a first film positioned between one end portion of the conductor and the first external electrode, and a second film positioned between the other end portion of the conductor and the second external electrode. The diffusion velocity in the first film and the second film is lower than that in the first external electrode and the second external electrode.

One object of the present invention is to provide an electronic component less prone to migration of impurity atoms between a conductor and an external electrode. A coil component as an electronic component includes a base body, a conductor, a first external electrode electrically connected to one end portion of the conductor, a second external electrode electrically connected to the other end portion of the conductor, a first film positioned between one end portion of the conductor and the first external electrode, and a second film positioned between the other end portion of the conductor and the second external electrode. The diffusion velocity in the first film and the second film is lower than that in the first external electrode and the second external electrode.

A product includes a nanostructure having a core and a shell. The core has a coercive field of at least 3 kOe and the shell has a saturation magnetization of at least 50 emu per gram. A product includes a nanostructure having a core and a shell. The shell has a coercive field of at least 3 kOe and the core has a saturation magnetization of at least 50 emu per gram. A method includes forming core/shell nanostructures and forming millimeter wave absorbers including the core/shell nanostructures and a support structure.

A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.

A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.

A soft magnetic composite comprising an iron or iron alloy ferromagnetic material coated with an oxide material. An interface between the ferromagnetic material and the layer of oxide contains antiphase domain boundaries. Two processes for producing a soft magnetic composite are also provided. One process includes depositing an oxide layer onto an iron or iron alloy ferromagnetic material by molecular beam epitaxy at a partial oxygen pressure of from 1×10.sup.−5 Torr to 1×10.sup.−7 Torr to form a coated composite. The other process includes milling an iron or iron alloy ferromagnetic material powder and an oxide powder by high-energy milling to form a mixture; compacting the mixture and curing in an inert gas atmosphere at a temperature from 500° C. to 1200° C. to form a soft magnetic composite.

A soft magnetic composite comprising an iron or iron alloy ferromagnetic material coated with an oxide material. An interface between the ferromagnetic material and the layer of oxide contains antiphase domain boundaries. Two processes for producing a soft magnetic composite are also provided. One process includes depositing an oxide layer onto an iron or iron alloy ferromagnetic material by molecular beam epitaxy at a partial oxygen pressure of from 1×10.sup.−5 Torr to 1×10.sup.−7 Torr to form a coated composite. The other process includes milling an iron or iron alloy ferromagnetic material powder and an oxide powder by high-energy milling to form a mixture; compacting the mixture and curing in an inert gas atmosphere at a temperature from 500° C. to 1200° C. to form a soft magnetic composite.

One object of the present invention is to provide an electronic component less prone to migration of impurity atoms between a conductor and an external electrode. A coil component as an electronic component includes: a base body; a conductor; a first external electrode electrically connected to the conductor; a second external electrode electrically connected to the conductor; and a metal film positioned between the conductor and the first external electrode, wherein the metal film contains metal particles configured such that an average of β/α is 0.8 to 1.2, where for each of the metal particles, α is a dimension of the metal particle in a direction horizontal to a boundary interface, and β is a dimension of the metal particle in a direction perpendicular to the boundary interface.

One object of the present invention is to provide an electronic component less prone to migration of impurity atoms between a conductor and an external electrode. A coil component as an electronic component includes: a base body; a conductor; a first external electrode electrically connected to the conductor; a second external electrode electrically connected to the conductor; and a metal film positioned between the conductor and the first external electrode, wherein the metal film contains metal particles configured such that an average of β/α is 0.8 to 1.2, where for each of the metal particles, α is a dimension of the metal particle in a direction horizontal to a boundary interface, and β is a dimension of the metal particle in a direction perpendicular to the boundary interface.

A magnetic base body is constituted by: metal magnetic grains containing Fe, and Si as an optional component, where the total content of the Fe and Si is 99% by mass or higher; and oxide layers present between the metal magnetic grains; wherein the ratio (I.sub.Fe2SiO4/I.sub.Fe) of the strongest diffraction line intensity (I.sub.Fe2SiO4) observed in a range of 30.8°≤2θ≤32.2° to the strongest diffraction line intensity (I.sub.Fe) observed in a range of 43.8°≤2θ≤45.2° in X-ray diffraction measurement using the CuKα ray is 0.0020 or higher; and the ratio (I.sub.Fe2O3/I.sub.Fe) of the strongest diffraction line intensity (I.sub.Fe2O3) observed in a range of 33.0°≤2θ≤34.4° to the I.sub.Fe in X-ray diffraction measurement using the CuKα ray is lower than 0.0010.