TY - JOUR
T1 - Raman study of the laser-induced chemical instabilities of BaCuO2, Ba2Cu3O5.9, and Ba2CuO3
AU - Chang, H.
AU - Ren, Y. T.
AU - Sun, Y. Y.
AU - Wang, Y. Q.
AU - Xue, Y. Y.
AU - Chu, C. W.
N1 - Funding Information:
The corresponding author wishes to express his appreciation to J.Y. Fan for preparing the figures. He is grateful to all his co-authors, especially C.W. Chu, for the hospitality he was given during his visit to the Texas Center for Superconductivity at the University of Houston. The work is supported by US-AFOSR F 49620-93-100310, NSF Grant No. DMR 91-22043 and ARPA Grant No. MDA 972-90-J-1001, the Texas Center for Superconductivity at the Uni- versity of Houston and the T.L.L. Temple Foundation.
PY - 1995/10/10
Y1 - 1995/10/10
N2 - The chemical transformations of three barium cuprates, BaCuO2, Ba2Cu3O5.9, and Ba2CuO3, which are the precursors and decomposition products of the Ba-based family of superconducting cuprates, were studied through their Raman bands under various laser irradiation conditions in air. BaCuO2 was stable up to 3 mW/μm2. Ba2Cu3O5.9 transformed into BaCuO2 under laser irradiation of 2 mW/μm2 or higher. Ba2CuO3 transformed to Ba2Cu3O5.9, first under laser irradiation of ∼1 mW/μm2, then to BaCuO2 when the irradiation was increased to above 2 mW/μm2. At elevated temperatures in air, BaCuO2 seems to be the most stable of these barium cuprates and Ba2CuO3 the least stable.
AB - The chemical transformations of three barium cuprates, BaCuO2, Ba2Cu3O5.9, and Ba2CuO3, which are the precursors and decomposition products of the Ba-based family of superconducting cuprates, were studied through their Raman bands under various laser irradiation conditions in air. BaCuO2 was stable up to 3 mW/μm2. Ba2Cu3O5.9 transformed into BaCuO2 under laser irradiation of 2 mW/μm2 or higher. Ba2CuO3 transformed to Ba2Cu3O5.9, first under laser irradiation of ∼1 mW/μm2, then to BaCuO2 when the irradiation was increased to above 2 mW/μm2. At elevated temperatures in air, BaCuO2 seems to be the most stable of these barium cuprates and Ba2CuO3 the least stable.
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U2 - 10.1016/0921-4534(95)00456-4
DO - 10.1016/0921-4534(95)00456-4
M3 - Article
AN - SCOPUS:0029390906
VL - 252
SP - 333
EP - 338
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3-4
ER -