Coexisting magnetic order and cooperative paramagnetism in the stuffed pyrochlore Tb2+x Ti2-2x Nbx O7

B. G. Ueland, J. S. Gardner, A. J. Williams, M. L. Dahlberg, J. G. Kim, Y. Qiu, J. R.D. Copley, P. Schiffer, R. J. Cava

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Abstract

Neutron-scattering and magnetization measurements have been performed on the stuffed pyrochlore system Tb2+x Ti2-2x Nbx O7. We find that despite the introduction of chemical disorder and increasingly antiferromagnetic interactions, a spin-glass transition does not occur for T≥1.5K and cooperative paramagnetic behavior exists for all x. For x=1, Tb3 NbO7, an antiferromagnetically ordered state coexisting with cooperative paramagnetic behavior is seen without applying any external fields or pressure, a situation advantageous for studying this cooperative behavior.

Original languageEnglish (US)
Article number060408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number6
DOIs
StatePublished - Feb 18 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Ueland, B. G., Gardner, J. S., Williams, A. J., Dahlberg, M. L., Kim, J. G., Qiu, Y., Copley, J. R. D., Schiffer, P., & Cava, R. J. (2010). Coexisting magnetic order and cooperative paramagnetism in the stuffed pyrochlore Tb2+x Ti2-2x Nbx O7. Physical Review B - Condensed Matter and Materials Physics, 81(6), [060408]. https://doi.org/10.1103/PhysRevB.81.060408