Superconducting Double Perovskite Bismuth Oxide Prepared by a Low‐Temperature Hydrothermal Reaction

Abstract

Perovskite-type structures (ABO3) have received significant attention because of their crystallographic aspects and physical properties, but there has been no clear evidence of a superconductor with a double-perovskite-type structure, whose different elements occupy A and/or B sites in ordered ways. In this report, hydrothermal synthesis at 220 °C produced a new superconductor with an A-site-ordered double perovskite structure, (Na(0.25)K(0.45))(Ba(1.00))3(Bi(1.00))4O12, with a maximum T(c) of about 27 K.

Evidence for cluster spin glass phase with precursor short-range antiferromagnetic correlations in the B -site disordered Ca(Fe1/2Kumar1, Senyshyn2, Pandey3 2019Phys. Rev. B377210View full textAdd to dashboardCite

“…However, the nature of their occupancy at the A or B site of ABO 3 perovskite lattice varies all the way from nearly ordered [9] to nearly disordered [10] depending on the compounds, and sometimes in the same compound also as a result of long-term annealing [10]. Within the broad family of such site-and charge-disordered/ordered compounds, complex perovskites with the formula A(B 1/2 B 1/2 )O 3 , where B : B are in 1 : 1 ratio, commonly known as double perovskites, have received immense attention from the point of view of the colossal magnetoresistance [11][12][13], half metallicity [14][15][16], metal to insulator transition [17][18][19], superconductivity [20,21], etc. ), normal ferroelectricity [9] and relaxor ferroelectricity [4][5][6][22][23][24], long-range magnetic ordering [25][26][27][28][29][30][31], and multiferroicity [32][33][34][35].…”

Crystal structures of a pentavalent bismuthate, SrBi2O6 and a lead bismuth oxide (Pb1/3Bi2/3)O1.4

“…Pentavalent bismuthates could not be synthesized by using high temperature reaction except for the system containing barium oxide, and most of bismuthates have trivalent bismuth atoms. We have prepared a variety of pentavalent bismuthates by low temperature hydrothermal reactions using a hydrate sodium bismuthate, NaBiO 3 •1.4H 2 O [1][2][3][4][5][6][7]. For example Bi 2 O 4 [1] with the distinct crystallographic sites of Bi 3+ and Bi 5+ , trirutile-type ABi 2 O 6 (A = Mg, Zn) [2], ilmenite-type AgBiO 3 [3] and LiBiO 3 [4] was obtained by this method.…”

Perovskite-Based Materials for Energy Applications

“…As of 2012, perovskites have been identified as possible inexpensive base materials for highefficiency commercial photovoltaics, and perovskites also have optoelectronic properties such as strong light absorption and facilitated charge transport [3]. Some of perovskites' typical properties are ferromagnetism [4], piezoelectricity [5,6], electrical conductivity [7,8], superconductivity [9,10], ion conductivity [11,12], magnetism [13,14], catalytic properties [15,16], electrode materials [17,18], and optical [19,20].…”