Chemical pressure induced spin freezing phase transition in kagome Pr langasites

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

doi:10.1103/PhysRevLett.102.067203

Chemical pressure induced spin freezing phase transition in kagome Pr langasites

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

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24 Scopus citations

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.

Original language	English
Article number	067203
Journal	Physical Review Letters
Volume	102
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.102.067203
State	Published - 10 Feb 2009

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title = "Chemical pressure induced spin freezing phase transition in kagome Pr langasites",

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.",

author = "Zhou, {H. D.} and Wiebe, {C. R.} and Jo, {Y. J.} and L. Balicas and Urbano, {R. R.} and Lumata, {L. L.} and Brooks, {J. S.} and Kuhns, {P. L.} and Reyes, {A. P.} and Y. Qiu and Copley, {J. R.D.} and Gardner, {J. S.}",

year = "2009",

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doi = "10.1103/PhysRevLett.102.067203",

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T1 - Chemical pressure induced spin freezing phase transition in kagome Pr langasites

AU - Zhou, H. D.

AU - Wiebe, C. R.

AU - Jo, Y. J.

AU - Balicas, L.

AU - Urbano, R. R.

AU - Lumata, L. L.

AU - Brooks, J. S.

AU - Kuhns, P. L.

AU - Reyes, A. P.

AU - Qiu, Y.

AU - Copley, J. R.D.

AU - Gardner, J. S.

PY - 2009/2/10

Y1 - 2009/2/10

N2 - 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.

AB - 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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JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Chemical pressure induced spin freezing phase transition in kagome Pr langasites

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