Elastic properties and hardness calculations of lanthanide nitrides in rocksalt structure

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• 作者：Jun Yang ; Faming Gao ; Haiyan Wang ; Huiyang Gou ; Xianfeng Hao ; Zhiping Li
• 关键词：Lanthanide nitrides ; Hardness ; Elastic properties
• 刊名：Materials Chemistry and Physics
• 出版年：2010
• 出版时间：15 February 2010
• 年：2010
• 卷：119
• 期：3
• 页码：499-504
• 全文大小：453 K

文摘

First principles calculations were performed to study the hardness, electronic and elastic properties of lanthanide nitrides in rocksalt structure. The calculated lattice parameters are in good agreement with experimental and other theoretical values. The calculations indicate that NdN, PmN, SmN, EuN, TbN are mechanically unstable. The lower B/G and Poisson's ratio of HoN and ErN show that they are brittle than other lanthanide nitrides. Results reveal that the ligand field stabilization energy and lanthanide contraction play important roles in determining the hardness of lanthanide nitrides in rocksalt structure.