TY - JOUR
T1 - Undoped and hole-doped superconductors T'-La 1.8-xEu 0.2Sr xCuO 4 (x = 0 and 0.05) prepared by solid-state reaction
AU - Takamatsu, Tomohisa
AU - Kato, Masatsune
AU - Noji, Takashi
AU - Koike, Yoji
PY - 2012/7/1
Y1 - 2012/7/1
N2 - We have successfully synthesized La 1.8x-Eu 0.2Sr xCuO 4 (x = 0 and 0.05) with the Nd 2CuO 4-type (T0-type) structure by means of the structural transformation at low temperatures from the K 2NiF 4-type (T-type) structure via the Sr 2CuO 3-type (S-type) structure. Superconductivity has appeared by postannealing T'-La 1.8-xEu 0.2Sr xCuO 4 in vacuum at 700 °C for the removal of excess oxygen. The superconducting transition temperatures are 20 and 13 K for x = 0 and 0.05, respectively. T'-La 1.8-xEu 0.2Sr xCuO 4 with x = 0.05 is, at least nominally, the first hole-doped superconducting cuprate with the T0-type structure.
AB - We have successfully synthesized La 1.8x-Eu 0.2Sr xCuO 4 (x = 0 and 0.05) with the Nd 2CuO 4-type (T0-type) structure by means of the structural transformation at low temperatures from the K 2NiF 4-type (T-type) structure via the Sr 2CuO 3-type (S-type) structure. Superconductivity has appeared by postannealing T'-La 1.8-xEu 0.2Sr xCuO 4 in vacuum at 700 °C for the removal of excess oxygen. The superconducting transition temperatures are 20 and 13 K for x = 0 and 0.05, respectively. T'-La 1.8-xEu 0.2Sr xCuO 4 with x = 0.05 is, at least nominally, the first hole-doped superconducting cuprate with the T0-type structure.
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U2 - 10.1143/APEX.5.073101
DO - 10.1143/APEX.5.073101
M3 - Article
AN - SCOPUS:84863760764
SN - 1882-0778
VL - 5
JO - Applied Physics Express
JF - Applied Physics Express
IS - 7
M1 - 073101
ER -