US 11,961,631 B2
Connection structure of superconducting layer, superconducting wire, superconducting coil, superconducting devce, and connection method of superconducting layer
Masaya Hagiwara, Yokohama Kanagawa (JP); Tomoko Eguchi, Yokohama Kanagawa (JP); Keiko Albessard, Yokohama Kanagawa (JP); and Yasushi Hattori, Kawasaki Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Mar. 8, 2022, as Appl. No. 17/689,455.
Claims priority of application No. 2021-149038 (JP), filed on Sep. 14, 2021.
Prior Publication US 2023/0085118 A1, Mar. 16, 2023
Int. Cl. H01B 12/06 (2006.01); H01F 6/06 (2006.01)
CPC H01B 12/06 (2013.01) [H01F 6/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A connection structure of a superconducting layer comprising:
a first superconducting layer;
a second superconducting layer; and
a connection layer provided between the first superconducting layer and the second superconducting layer, and the connection layer including a first substance containing a rare earth element (RE), barium (Ba), copper (Cu), and oxygen (O) and a second substance containing at least one metal element selected from the group consisting of silver (Ag), aluminum (Al), indium (In), copper (Cu), tin (Sn), and zinc (Zn),
wherein a first area ratio at a first interface between the first superconducting layer and the connection layer is 1% or more and 50% or less, the first area ratio is an area ratio of a first region per unit area, the first region is a region where the second substance and the first superconducting layer are in contact with each other, and
a second area ratio at a second interface between the second superconducting layer and the connection layer is 1% or more and 50% or less, the second area ratio is an area ratio of a second region per unit area, the second region is a region where the second substance and the second superconducting layer are in contact with each other.