Gregory Czap, Kyungju Noh, et al.
APS Global Physics Summit 2025
The X-ray powder diffraction technique has been used to determine the average ionic radius of Cen+ present in the Nd2-xCexCuO4 electron superconductor system. The effect of the ionic size of the dopant M on the c-lattice dimension of a lanthanide-doped Nd2-xMxCuO4 system has been determined from a similar Nd2-xThxCuO4 electron superconductor system in which the ionic radius of the Th4+ ions is known. Values of the c-lattice dimension obtained from the experimental data of Nd2-xCexCuO4 (x=0.0-0.20) samples are within the upper and lower bounds of the c-lattice dimensional calculated assuming pure Ce3+ (r=1.143 A ̊) and pure Ce4+ (0.97 Å) ions, indicating an intermediate ionic radius and hence an effective valence between +3 and +4. Values of the average ionic radius and the effective valence obtained from our Nd2-xCexCuO4 samples are 0.998 Å and +3.84, respectively. © 1989.
Gregory Czap, Kyungju Noh, et al.
APS Global Physics Summit 2025
Fernando Marianno, Wang Zhou, et al.
INFORMS 2021
Joy Y. Cheng, Daniel P. Sanders, et al.
SPIE Advanced Lithography 2008
Frank R. Libsch, Takatoshi Tsujimura
Active Matrix Liquid Crystal Displays Technology and Applications 1997