Infrared study of relevance of Nd2CuO4 structure to superconductivity of La-Sr-Cu-O system期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Infrared study of relevance of Nd2CuO4 structure to superconductivity of La-Sr-Cu-O system

Authors:	D Rambabu K Muraleedharan

Affiliation:	(1) Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad, 500058, Indi;(2) Department of Physics, Indian Institute of Technology, Madras, 600036, India

Abstract:	A comparative study of the infrared spectra of Nd₂Cu_1–xAg_xO₄ and La_1.8Sr_0.2Cu_1–xAg_xO₄ is reported. It is shown that the appearance of an absorption peak at 680 cm^–1 is due to local distortions around the Ag impurities, and the appearance of this peak need not imply a structural transformation from Nd₂CuO₄ type of K₂NiF₄ type. It is shown that Nd₂CuO₄ structure is not important for the superconductivity of La-Sr-Cu-O system.

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