Nd substitution in y/ba sites in melt processed YBa2Cu3O7− δ through Nd2O3 additions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

Nd substitution in y/ba sites in melt processed YBa2Cu3O7− δ through Nd2O3 additions

Authors:	Chakrapani Varanasi Paul J. Mc Ginn Howard A. Blackstead David B. Pulling

Affiliation:	(1) Department of Chemical Engineering, University of Notre Dame, 46556 Notre Dame, IN;(2) Department of Physics, University of Notre Dame, 46556 Notre Dame, IN

Abstract:	YBa₂Cu₃O_{7− δ} (Y123) samples with excess Nd₂O₃ and Y₂O₃ additions in the same molar ratios were melt textured in air. In the Nd-doped samples, in addition to Y ion site substitution, partial substitution into the Ba²⁺ sites is anticipated because of the similar ionic sizes of Nd³⁺ and Ba²⁺. The microstructure, T_c, and magnetic properties of Nd-doped samples were analyzed and compared with undoped Y123 and samples with excess Y₂O₃. The Nd₂O₃ additions lead to significant magnetization improvements, likely due to both rare earth- and Ba-site substitution by the doped Nd³⁺ ions, and to increases in T_c. Y₂O₃ additions resulted in no marked property enhancement.

Keywords:	Magnetization melt texturing rare earth substitution YBa₂Cu₃O_6+x
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