Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound
Lanthanum barium copper oxide, or LBCO, is an inorganic compound with the formula CuBa0.15La1.85O4. It is a black solid produced by heating an intimate mixture of barium oxide, copper(II) oxide, and lanthanum oxide in the presence of oxygen. The material was discovered in 1986 and was the first high temperature superconductor.[1] Johannes Georg Bednorz and K. Alex Müller shared the 1987 Nobel Prize in physics for the discovery that this material exhibits superconductivity at the then unusually high temperature. This finding led to intense and fruitful efforts to generate other cuprate superconductors.[2]
Lanthanum barium copper oxide is related to the far simpler compound lanthanum cuprate, which has a similar structure. In lanthanum barium copper oxide, some of the La(III) centers are replaced by Ba(II), which has a similar ionic radius. This Ba-for-La replacement causes removal of some electrons from the d-band associated with the sheets of copper oxide.[3]
^J. G. Bednorz and K. A. Müller (1986). "Possible high Tc Superconductivity in the Ba−La−Cu−O System". Z. Phys. B. 64 (1): 189–193. Bibcode:1986ZPhyB..64..189B. doi:10.1007/BF01303701. S2CID 118314311.
^Keimer, B.; Kivelson, S. A.; Norman, M. R.; Uchida, S.; Zaanen, J. (2015). "From quantum matter to high-temperature superconductivity in copper oxides". Nature. 518 (7538): 179–186. Bibcode:2015Natur.518..179K. doi:10.1038/nature14165. hdl:1887/3197267. PMID 25673411. S2CID 205242367.
^Raveau, Bernard (2013). "Impact of Crystal Chemistry upon the Physics of Strongly Correlated Electrons in Oxides". Angewandte Chemie International Edition. 52 (1): 167–175. doi:10.1002/anie.201204884. PMID 23203459.
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Lanthanumbariumcopperoxide, or LBCO, is an inorganic compound with the formula CuBa0.15La1.85O4. It is a black solid produced by heating an intimate...
certain semiconducting oxides became superconducting at relatively high temperature, in particular, a lanthanumbariumcopperoxide becomes superconducting...
Thallium barium calcium copperoxide, or TBCCO (pronounced "tibco"), is a family of high-temperature superconductors having the generalized chemical formula...
earth elements, the usual oxidation state is +3, although some compounds are known with an oxidation state of +2. Lanthanum has no biological role in...
advent of electrolysis. Barium has few industrial applications. Historically, it was used as a getter for vacuum tubes and in oxide form as the emissive...
orthorhombic. Replacement of some lanthanum by barium gives the quaternary phase CuLa1.85Ba0.15O4, called lanthanumbariumcopperoxide. That doped material displays...
cuprate superconductors. Yttrium bariumcopperoxide (YBa2Cu3O7) consists of both Cu(II) and Cu(III) centres. Like oxide, fluoride is a highly basic anion...
metal oxides, and in 1986 they succeeded in inducing superconductivity in a lanthanumbariumcopperoxide (LaBaCuO, also known as LBCO). The oxide's critical...
least the 14 metallic chemical elements with atomic numbers 57–70, from lanthanum through ytterbium. In the periodic table, they fill the 4f orbitals. Lutetium...
Huang, Z. J. (1987-01-30). "Superconductivity at 52.5 K in the Lanthanum-Barium-Copper-Oxide System". Science. 235 (4788): 567–569. Bibcode:1987Sci...235...
broke the record of critical temperature superconductivity in lanthanumbariumcopperoxide (LBCO) to 35 K above absolute zero, which had remained unbroken...
Caroline (2005). "Neue Barium-Antimonid-Oxide mit den Zintl-Ionen [Sb]3−, [Sb2]4− und 1∞[Sbn]n− / New Barium Antimonide Oxides containing Zintl Ions [Sb]3−...
Bednorz and Müller discovered superconductivity in lanthanumbariumcopperoxide (LBCO), a lanthanum-based cuprate perovskite material, which had a transition...
elements: caesium and barium. After this, the first f-block elements (coloured green below) begin to appear, starting with lanthanum. These are sometimes...
variation regarding the heavier members of group 3. The common placement of lanthanum and actinium in these positions is not supported by physical, chemical...
occur naturally as a free metal on Earth; it is found only in various oxidation states in minerals. The free element, a silvery metal with a grey cast...
as well as reacting with oxygen to form oxides such as strontium oxide (SrO). Calcium, strontium, and barium react with water to produce hydrogen gas...
containing oxides such as "anhydrous baryte" (bariumoxide BaO) and anhydrous boric acid (B2O3), with which he developed barium crowns, barium flints and...
has also been reported. Several barium platinides have been synthesized in which platinum exhibits negative oxidation states ranging from −1 to −2. These...
magnesium, lanthanum, and yttrium oxides, but these gave green-tinted light and were unsuccessful. Six years later, he discovered that pure thorium oxide produced...
all barium, most strontium, and most lead compounds.(p 8) Radium oxide (RaO) has not been characterized well past its existence, despite oxides being...
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