Pressure-induced structural changes in Nd2-xCexCuO4 (x = 0 and 0.165)

T. Kamiyama, F. Izumi, H. Takahashi, J. D. Jorgensen, B. Dabrowski, R. L. Hitterman, D. G. Hinks, H. Shaked, Thomas O Mason, M. Seabaugh

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Abstract

The crystal structures of Nd2CuO4 and superconducting Nd1.835Ce0.165CuO4 under hydrostatic pressure up to 0.6 GPa have been investigated by time-of-flight neutron powder diffraction with a He gas pressure cell. The a and c parameters and the volumes of the tetragonal unit cells decreased linearly with increasing pressure. The bulk moduli, K, are 134 GPa for Nd2CuO4 and 140 GPa for the Ce-doped sample. These K values lie between those of La1.85Sr0.15CuO4 and La1.82Ca1.18Cu2O6. The compressibilities along the c axes were about 1.5 times as large as those along the a axes. The linear compressibilities along the a and c axes and the bulk moduli were compared with those calculated on the basis of a simple compression model proposed by Cornelius et al. The negligible effect of pressure on the Tc of Nd2-xCexCuO4 is discussed in connection with the crystal data obtained in this study.

Original languageEnglish
Pages (from-to)377-388
Number of pages12
JournalPhysica C: Superconductivity and its Applications
Volume229
Issue number3-4
DOIs
Publication statusPublished - Aug 15 1994

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Kamiyama, T., Izumi, F., Takahashi, H., Jorgensen, J. D., Dabrowski, B., Hitterman, R. L., Hinks, D. G., Shaked, H., Mason, T. O., & Seabaugh, M. (1994). Pressure-induced structural changes in Nd2-xCexCuO4 (x = 0 and 0.165). Physica C: Superconductivity and its Applications, 229(3-4), 377-388. https://doi.org/10.1016/0921-4534(94)90521-5