A New High-T_c Oxide Superconductor without a Rare Earth Element

Abstract

We have discovered a new high-T c oxide superconductor of the Bi-Sr-Ca-Cu-O system without any rare earth element. The oxide BiSrCaCu2O x has T c of about 105 K, higher than that of YBa2Cu3O7 by more than 10 K. In this oxide, the coexistence of Sr and Ca is necessary to obtain high T c.

Preparation of nanoparticles of silver halides, superconductors and magnetic materials using water-in-oil microemulsions as nano-reactors

“…This led to the discovery of new superconducting materials in the Y-Ba-Cu-O system with T c above the boiling point of liquid nitrogen [125,126]. Recently, even higher T c (> 110 K) superconductors were discovered in the Bi-Sr-Ca-Cu-O [127] and T1-Ba-Ca-Cu-O [128] systems.…”

Improvement of superconducting properties in Na-doped BSCCO superconductor

“…Since the discovery of Bi-based high-temperature superconductors [1], which are among the most promising materials for technological and industrial applications, many experimental studies have been performed [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] in order to improve their critical temperature (Tc), critical current density (Jc), and better understand the structural properties of the system. The BSCCO families can be described by the Bi 2 Sr 2 Ca n-1 Cu n O 2n+4+y general formula, where n=1, 2 and 3.…”

Study on Unconventional Superconductivity after the BCS Paradigm

“…This discovery ignited an explosion in the field of superconductivity. In later 7-8 years, many other new superconducting systems were discovered, for example the Y Ba 2 Cu 3 O 7−δ (T c ≈ 90K) [5,6], the Bibased systems Bi 2 S rCa 2 CuO 8 (T c ≈ 95K) and Bi 2 S r 2 Ca 2 Cu 3 O 12 (T c ≈ 125K) [7], the Thallium based system [8] and the mercury based system [9] etc. So far the highest superconducting transition temperature, T c =164 K, was discovered in the HgBa 2 Ca 2 Cu 3 O 8+δ under a high pressure of 45 GPa.…”