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Zhou HD, Wiebe CR, Jo YJ, et al. Chemical pressure induced spin freezing phase transition in kagome pr langasites. Phys Rev Lett. 2009;102(6):067203doi: 10.1103/PhysRevLett.102.067203.
Zhou, H. D., Wiebe, C. R., Jo, Y. J., Balicas, L., Urbano, R. R., Lumata, L. L., Brooks, J. S., Kuhns, P. L., Reyes, A. P., Qiu, Y., Copley, J. R., & Gardner, J. S. (2009). Chemical pressure induced spin freezing phase transition in kagome pr langasites. Physical review letters, 102(6), 067203. https://doi.org/10.1103/PhysRevLett.102.067203
Zhou, H D, et al. "Chemical pressure induced spin freezing phase transition in kagome pr langasites." Physical review letters vol. 102,6 (2009): 067203. doi: https://doi.org/10.1103/PhysRevLett.102.067203
Zhou HD, Wiebe CR, Jo YJ, Balicas L, Urbano RR, Lumata LL, Brooks JS, Kuhns PL, Reyes AP, Qiu Y, Copley JR, Gardner JS. Chemical pressure induced spin freezing phase transition in kagome pr langasites. Phys Rev Lett. 2009 Feb 13;102(6):067203. doi: 10.1103/PhysRevLett.102.067203. Epub 2009 Feb 10. PMID: 19257628.
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Phys Rev Lett. 2009 Feb 13;102(6):067203. doi: 10.1103/PhysRevLett.102.067203. Epub 2009 Feb 10.

Chemical pressure induced spin freezing phase transition in kagome pr langasites.

Physical review letters

H D Zhou, C R Wiebe, Y-J Jo, L Balicas, R R Urbano, L L Lumata, J S Brooks, P L Kuhns, A P Reyes, Y Qiu, J R D Copley, J S Gardner

Affiliations

  1. Department of Physics, Florida State University, Tallahassee, Florida 32306-3016, USA.

PMID: 19257628 DOI: 10.1103/PhysRevLett.102.067203

Abstract

The 2D kagome system Pr3Ga5SiO14 has been previously identified as a spin-liquid candidate in zero field, displaying no magnetic long-ranged order down to at least 35 mK. Perturbations upon such systems, either under applied fields or applied pressure, should induce a spin freezing phase transition, but there are very few experimental realizations of this phenomena other than the well-studied 3D pyrochlore Tb2Ti2O7. In this Letter, we report the observation of a spin freezing phase transition in Pr3Ga5SiO14 through the application of chemical pressure--that is, through a systematic substitution on the Si site with larger ions and an elongation of the nearest-neighbor Pr-Pr distance in the kagome lattice. This results in a suppression of the T2 component of the heat capacity, and the reduction of the exchange constant eventually leads to dipolar-driven spin freezing.

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