Tdk Corporation

Isao Nakahata

Kazuhiro Yoshidome

Hiroyuki Matsumoto

Takuya Tsukahara

Kenji Horino

Akito Hasegawa

Atsuyuki Nakano

Hajime Amano

Masakazu Hosono

Kyotaro Abe

Syota Goto

Akihiro Harada

Yasushi Enokido

Takuya Aoki

Kumiko Yamazaki

Tomokazu Ishikura

Osamu Hirose

Hironobu Kumaoka

Mitsuhiro Matsuhashi

A magnetic core excellent in productivity, having stable magnetic characteristics, and easy to handle for a coil device including a conductor and is formed by stacking a plurality of soft magnetic thin ribbons divided into small pieces.

Magnetic core and method for manufacturing same, and coil component

A soft magnetic alloy ribbon having high corrosion resistance is obtained. The soft magnetic alloy ribbon contains Fe, P, and Si. A maximum point of a concentration of P and a maximum point of a concentration of Si including in oxides is present in a region within 20 nm from the surface, when a concentration distribution of an element contained in the soft magnetic alloy ribbon is measured from a surface toward an interior of the soft magnetic alloy ribbon in a thickness direction.

Soft magnetic alloy ribbon and magnetic component

An alloy ribbon that is an alloy ribbon containing a metal as a main component, and has a recess on at least one principal surface, in which a depth of the recess is 5% or more and 75% or less of an average thickness.

Alloy ribbon and laminated core

Provided a soft magnetic alloy ribbon containing Fe and B. Convex portions having an average convex portion height of 7 nm to 130 nm are present on an alloy surface.

Soft magnetic alloy, soft magnetic alloy ribbon, laminate, and magnetic core

A soft magnetic alloy has a main component of Fe. The soft magnetic alloy contains P. A Fe-rich phase and a Fe-poor phase are contained. An average concentration of P in the Fe-poor phase is 1.5 times or larger than an average concentration of P in the soft magnetic alloy by number of atoms.

Soft magnetic alloy and magnetic device

The object of the present invention is to provide an alloy ribbon capable of having excellent adhesiveness between the alloy ribbons when a plurality of the alloy ribbons is stacked; and also, to provide a magnetic core using the alloy ribbon. The present invention is an alloy ribbon comprising metals scattered on at least one surface of the alloy ribbon, in which diameters of the scattered metals are 1 μm or more, and the scattered metals include Cu.

Alloy ribbon and magnetic core

To provide a soft magnetic alloy or the like, from which a magnetic component having a good temperature property of core loss can be obtained. The soft magnetic alloy includes Fe. The soft magnetic alloy includes a crystallite, and an amorphous phase existing around the crystallite. A total area ratio of the crystallite in a cross section of the soft magnetic alloy is 40% or more and less than 60%. An average thickness of the amorphous phase is 3.0 nm or more and 10.0 nm or less. A standard deviation of a thickness of the amorphous phase is 10.0 nm or less.

Soft magnetic alloy, soft magnetic alloy ribbon, soft magnetic powder, and magnetic component

A soft magnetic ribbon for a magnetic core segmented into small pieces includes: an inductance priority region having a first average crack interval; and an eddy current suppression priority region having a second average crack interval, in which the first and second average crack intervals are different from each other.

Soft magnetic ribbon for magnetic core, magnetic core, coil unit, and wireless power transmission unit

A specific depth at which a concentration of Fe reaches 10 at % is 18 nm or more and 500 nm or less from the first surface, and from the first surface to the specific depth, the concentration of Fe is less than 10 at %, and a positive increase region is present in which the concentration of Fe increases with a substantially positive concentration gradient, in a case where the concentration of Fe is measured in a depth direction from a first surface of a ribbon.

Magnetic alloy ribbon, laminate, and magnetic core

A soft magnetic alloy ribbon having high corrosion resistance and good magnetic properties is obtained. The soft magnetic alloy ribbon contains Fe and M. M is at least one selected from the group consisting of Nb, Ta, W, Zr, Hf, Mo, Cr, and Ti, and a part of M is included in oxides. A maximum point of a concentration of at least one of M included in the oxides is present in a region within 20 nm from the surface, when a concentration distribution of an element contained in the soft magnetic alloy ribbon is measured from a surface toward an interior of the soft magnetic alloy ribbon in a thickness direction.

A soft magnetic alloy thin strip which has high saturation magnetic flux density and low coercivity, which enables a core with high space factor and high saturation magnetic flux density. A soft magnetic alloy thin strip including a main component that has a composition formula (FeX1X2))MBPSiCS. In the formula, X1, X2 and M are selected from a specific element group; 0&#x2264;a&#x2264;0.140, 0.020&#x2264;b&#x2264;0.200, 0&#x2264;c&#x2264;0.150, 0&#x2264;d&#x2264;0.090, 0&#x2264;e&#x2264;0.030, 0&#x2264;f&#x2264;0.030, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50; and at least one of a, c and d is larger than 0. The strip has a structure that is composed of an Fe-based nanocrystal; and the surface roughness of a release surface satisfies 0.85&#x2264;Ra/Ra&#x2264;1.25 (wherein Rais the average of arithmetic mean roughnesses in the central portion, and Rais the average in the edge portion).

Soft magnetic alloy ribbon and magnetic device

A soft magnetic alloy powder includes a plurality of soft magnetic alloy particles of a soft magnetic alloy represented by a composition formula (FeX1X2)MBPSiC, wherein X1 represents Co and/or Ni; X2 represents at least one selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, and V; 0.020&#x2264;a&#x2264;0.14, 0.020&#x3c;b&#x2264;0.20, 0&#x3c;c&#x2264;0.15, 0&#x2264;d&#x2264;0.060, 0&#x2264;e&#x2264;0.040, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied, and wherein the soft magnetic alloy has a nano-heterostructure with initial fine crystals present in an amorphous substance; and the surface of each of the soft magnetic alloy particles is covered with a coating portion including a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.

Soft magnetic alloy powder, dust core, and magnetic component

Soft magnetic alloy powder includes plurality of soft magnetic alloy particles of soft magnetic alloy represented by composition formula (FeX1X2)MBPSiCSTi, wherein X1 represents Co and/or Ni; X2 represents at least one selected from group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from group consisting of Nb, Hf, Zr, Ta, Mo, W, and V; 0.020&#x2264;a&#x2264;0.14, 0.020&#x3c;b&#x2264;0.20, 0&#x3c;c&#x2264;0.15, 0&#x2264;d&#x2264;0.060, 0&#x2264;e&#x2264;0.040, 0&#x2264;f&#x2264;0.010, 0&#x2264;g&#x2264;0.0010, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied, wherein at least one of f and g is more than 0; and wherein soft magnetic alloy has a nano-heterostructure with initial fine crystals present in an amorphous substance; and surface of each of the soft magnetic alloy particles is covered with a coating portion including a compound of at least one element selected from group consisting of P, Si, Bi, and Zn.

A soft magnetic alloy is composed of a Fe-based nanocrystal and an amorphous phase. In the soft magnetic alloy, S2-S1&#x3e;0 is satisfied, where S1 (at %) denotes an average content rate of Si in the Fe-based nanocrystal and S2 (at %) denotes an average content rate of Si in the amorphous phase. In addition, the soft magnetic alloy has a composition formula of ((Fe)X1X2)MBSiPCrCu)C. X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, S and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, V and W. In the composition formula, a to g, &#x3b1; and &#x3b2; are in specific ranges.

A dielectric thin film with high relative permittivity and high insulation can establish the amount of nitrogen in a metal oxynitride to be low. A dielectric thin film, wherein the dielectric composition is a metal oxynitride solid solution including Ma and Mb: a composition represented by the chemical formula MazMbOxNy (Ma is one element selected from Sr, Ba, Ca, La, Ce, Pr, Nd, and Na, Mb is one element selected from Ta, Nb, Ti and W, O is oxygen, and N is nitrogen); when a is the ionic valence exhibited when Ma occupies an A site in the perovskite structure and b is the ionic valence exhibited when Mb occupies a B site in the perovskite structure, a and b are 6.7&#x2264;a+b&#x2264;7.3, and x, y and z are 0.8&#x2264;z&#x2264;1.2, 2.450&#x2264;x&#x2264;3.493, and 0.005&#x2264;y&#x2264;0.700.

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Tokyo, Japan

Isao Nakahata