Poisson's ratio of BiFeO₃ thin films: X-ray reciprocal space mapping under variable uniaxial strain

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• 作者：S. Hu ; A. Alsubaie ; Y. Wang ; J. H. Lee ; K.-R. Kang ; C.-H. Yang and J. Seidel
• 刊名：physica status solidi (a)
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：214
• 期：1
• 全文大小：793K
• ISSN：1862-6319

文摘

We investigate the mechanical properties of BiFeO₃ (BFO) thin films grown on SrTiO₃ (001) substrates that were manually bent using a specially designed uniaxial bending stage. X-ray measurements under variable uniaxial strain show that excessive strains up to ∼2% could be applied along the [100] direction with little cross talk between [100] and [010] directions. X-ray reciprocal space maps were acquired to investigate the evolution of -a and c-axis lattice constants under variable strain and Poisson's ratio of BFO thin films v_zx was determined to be 0.30 ± 0.01.