Stabilizing the Tb-based 214 cuprate by partial Pd substitution

Abstract

Previously known to form only under high pressure synthetic conditions, here we report that the T′-type 214-structure cuprate based on the rare earth atom Tb is stabilized for ambient pressure synthesis through partial substitution of Pd for Cu. The new material is obtained in purest form for mixtures of nominal composition Tb1.96Cu0.8Pd0.2O4. The refined formula, in orthorhombic space group Pbca, with a = 5.5117(1) Å, b = 5.5088(1) Å, and c = 11.8818(1) Å, is Tb2Cu0.83Pd0.17O4. An incommensurate structural modulation is seen along the a axis by electron diffraction and high resolution imaging. Magnetic susceptibility measurements reveal long-range antiferromagnetic ordering at 7.9 K, with a less pronounced feature at 95 K; a magnetic moment reorientation transition is observed to onset at a field of approximately 1.1 T at 3 K. The material is an n-type semiconductor.

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ACKNOWLEDGMENTS

This material is based upon work supported by the National Science Foundation (Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM) under Cooperative Agreement No. DMR-1539918). The use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The work at Brookhaven was sponsored by the U.S. DOE BES, by the Materials Sciences and Engineering Division under Contract DE-SC0012704, and supported by the resources of the Center for Functional Nanomaterials at Brookhaven National Laboratory, which is a U.S. DOE Office of Science Facility.

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Correspondence to Yuzki M. Oey or R. J. Cava.

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Oey, Y.M., Park, J.E., Tao, J. et al. Stabilizing the Tb-based 214 cuprate by partial Pd substitution. Journal of Materials Research 33, 1690–1697 (2018). https://doi.org/10.1557/jmr.2018.102

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