Japan Science and Technology Agency

Yoichi Kamihara

Hideo Hosono

Masahiro Hirano

Toshio Kamiya

Hiroshi Yanagi

Satoru Matsuishi

Hidenori Hiramatsu

Sungwng Kim

Takatoshi Nomura

Seok Gyu Yoon

Disclosed is a superconducting compound which has a structure obtained by partially substituting oxygen ions of a compound, which is represented by the following chemical formula; LnTMOPh [wherein Ln represents at least one element selected from Y and rare earth metal elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), TM represents at least one element selected from transition metal elements (Fe, Ru, Os, Ni, Pd and Pt), and Pn represents at least one element selected from pnictide elements (N, P, As and Sb)] and has a ZrCuSiAs-type crystal structure (space group P4/nmm), with at least one kind of monovalent anion (F, Clor Br). The superconducting compound alternatively has a structure obtained by partially substituting Ln ions of the compound with at least one kind of tetravalent metal ion (Ti, Zr, Hf, C, Si, Ge, Snor Pb) or a structure obtained by partially substituting Ln ions of the compound with at least one kind of divalent metal ion (Mg, Ca, Sror Ba). The Tc of the superconducting compound is controlled in accordance with the ion substitution amount.

Superconducting compound and method for producing the same

Provides a new non-oxide system compound material superconductor as an alternative of the perovskite type copper oxides superconductor. Layered compounds which are represented by chemical formula AF(TM)Pn (wherein, A is at least one selected from a group consisting of the second family elements in the long form periodic table, F is a fluorine ion, TM is at least one selected from a group of transition metal elements consisting of Fe, Ru, Os, Ni, Pd, and Pt, and Pn is at least one selected from a group consisting of the fifteenth family elements in the long form periodic table), having a crystal structure of ZrCuSiAs type (space group P4/nmm) and which become superconductors by doping trivalent cations or divalent anions.

Layered compound, superconductor and method for producing same

Growing community of inventors

Tokyo, Japan

Yoichi Kamihara