公开(公告)号：US20250111975A1

公开(公告)日：2025-04-03

申请号：US18901045

申请日：2024-09-30

Applicant: TDK Corporation

Inventor： Hajime Amano ,  Kensuke Ara ,  Kazuhiro Yoshidome

IPC: H01F10/13

Abstract: A nanogranular magnetic film includes first phases comprised of nano-domains dispersed in a second phase. The first phases include Fe and Co. The second phase includes a second phase compound including at least one selected from the group consisting of O, N, and F. A measurement range is determined in the nanogranular magnetic film. The measurement range is divided with grids including at least 80,000 grids each measuring 1 nm×1 nm×1 nm. Fe/(Fe+Co) and a concentration of the second phase compound of each of the grids are measured in atomic ratio. Provided that the grids are classified into MX-rich grids and MX-poor grids, a CV of Fe/(Fe+Co) of the MX-rich grids is larger than a CV of Fe/(Fe+Co) of the MX-poor grids.

公开(公告)号：US11145448B2

公开(公告)日：2021-10-12

申请号：US16296378

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Masakazu Hosono ,  Kenji Horino ,  Hiroyuki Matsumoto ,  Kazuhiro Yoshidome ,  Akito Hasegawa ,  Hajime Amano ,  Isao Nakahata

IPC: H01F1/24 ,  H01F27/255 ,  B22F1/02 ,  B22F1/00 ,  C22C45/00 ,  H01F1/153 ,  H01F3/08

Abstract: A soft magnetic alloy powder includes a plurality of soft magnetic alloy particles of a soft magnetic alloy represented by a composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaBbPcSidCe, 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≤a≤0.14, 0.020

公开(公告)号：US20250111976A1

公开(公告)日：2025-04-03

申请号：US18901060

申请日：2024-09-30

Applicant: TDK Corporation

Inventor： Hajime Amano ,  Kensuke Ara ,  Kazuhiro Yoshidome

IPC: H01F10/13

Abstract: A nanogranular magnetic film includes first phases comprised of nano-domains dispersed in a second phase. The first phases include Fe and Co. The second phase includes at least one selected from the group consisting of O, N, and F. A CV of Fe/(Fe+Co) of grids is 0.150 or more and 0.500 or less, provided that a measurement range is determined in the nanogranular magnetic film, the measurement range is divided with the grids including at least 80,000 grids each measuring 1 nm×1 nm×1 nm, and Fe/(Fe+Co) of each of the grids is measured in atomic ratio.

公开(公告)号：US12165794B2

公开(公告)日：2024-12-10

申请号：US16260715

申请日：2019-01-29

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Akito Hasegawa ,  Syota Goto ,  Masakazu Hosono ,  Hajime Amano ,  Isao Nakahata

IPC: H01F1/147 ,  B22D23/00 ,  B22F1/07 ,  C21D1/26 ,  C21D1/30 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C21D9/52 ,  C22C33/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16 ,  C22C45/00 ,  C22C45/02 ,  C22C45/04 ,  H01F1/153 ,  B22F9/02 ,  B22F9/04 ,  C22C38/40 ,  C22C38/52

Abstract: 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.

公开(公告)号：US11972884B2

公开(公告)日：2024-04-30

申请号：US16244633

申请日：2019-01-10

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Akihiro Harada ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Akito Hasegawa ,  Kensuke Ara ,  Hajime Amano ,  Masakazu Hosono

IPC: H01F1/153 ,  C22C38/42 ,  C22C45/02 ,  H01F1/147 ,  H01F41/02

CPC classification number: H01F1/15325 ,  H01F1/14741 ,  H01F1/15308 ,  H01F1/15333 ,  H01F41/0226 ,  H01F41/0246 ,  C22C38/42 ,  C22C45/02

Abstract: A soft magnetic alloy includes a main component of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaBbPcSidCe. X1 is one or more of Co and Ni. X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements. M is one or more of Nb, Hf, Zr, Ta, Mo, W, and V. 0.020≤a≤0.14 is satisfied. 0.020

公开(公告)号：US11495377B2

公开(公告)日：2022-11-08

申请号：US16971338

申请日：2019-02-15

Applicant: TDK CORPORATION

Inventor： Hajime Amano ,  Akihiro Harada ,  Kenji Horino ,  Hiroyuki Matsumoto ,  Kazuhiro Yoshidome ,  Akito Hasegawa ,  Kensuke Ara ,  Masakazu Hosono

IPC: H01F1/153 ,  C22C45/00

Abstract: Provided is a soft magnetic alloy which has high saturation flux density and low coercivity and is represented by the compositional formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaPbSicCudX3eBf, wherein X1 is at least one element selected from the group consisting of Co and Ni, X2 is at least one element selected from the group consisting of Ti, V, Mn, Ag, Zn, Al, Sn, As, Sb, Bi, and rare earth elements, X3 is at least one element selected from the group consisting of C and Ge, and M is at least one element selected from the group consisting of Zr, Nb, Hf, Ta, Mo, and W, and wherein 0.030≤a≤0.120, 0.010≤b≤0.150, 0≤c≤0.050, 0≤d≤0.020, 0≤e≤0.100, 0≤f≤0.030, α≥0, β≥0, and 0≤α+β≤0.55.