Glassy statics and dynamics in the chemically ordered pyrochlore antiferromagnet Y2Mo2O7

J. S. Gardner; B. D. Gaulin; S. H. Lee; C. Broholm; N. P. Raju; J. E. Greedan

doi:10.1103/PhysRevLett.83.211

Glassy statics and dynamics in the chemically ordered pyrochlore antiferromagnet Y₂Mo₂O₇

J. S. Gardner, B. D. Gaulin, S. H. Lee, C. Broholm, N. P. Raju, J. E. Greedan

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Abstract

Static and dynamic magnetic correlations in the geometrically frustrated pyrochlore antiferromagnet Y₂Mo₂O₇ have been studied using neutron scattering. The material is chemically ordered but displays a spin-freezing transition at T_g∼22.5K. We show that dynamic short range order develops below room temperature. Upon cooling the two-spin correlation length never exceeds 5 Å, yet the spin fluctuation rate vanishes in proportion to T−T_g. For T<T_g low energy spin fluctuations are replaced by static antiferromagnetic short range order with a frozen staggered magnetization |⟨S⟩|/S≈0.67(2). Locally the frozen spin structure corresponds to four sublattice ordering with zero magnetization.

Original language	English
Pages (from-to)	211-214
Number of pages	4
Journal	Physical Review Letters
Volume	83
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.83.211
State	Published - 1999
Externally published	Yes

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title = "Glassy statics and dynamics in the chemically ordered pyrochlore antiferromagnet Y2Mo2O7",

abstract = "Static and dynamic magnetic correlations in the geometrically frustrated pyrochlore antiferromagnet Y2Mo2O7 have been studied using neutron scattering. The material is chemically ordered but displays a spin-freezing transition at Tg∼22.5K. We show that dynamic short range order develops below room temperature. Upon cooling the two-spin correlation length never exceeds 5 {\AA}, yet the spin fluctuation rate vanishes in proportion to T−Tg. For Tg low energy spin fluctuations are replaced by static antiferromagnetic short range order with a frozen staggered magnetization |⟨S⟩|/S≈0.67(2). Locally the frozen spin structure corresponds to four sublattice ordering with zero magnetization.",

author = "Gardner, {J. S.} and Gaulin, {B. D.} and Lee, {S. H.} and C. Broholm and Raju, {N. P.} and Greedan, {J. E.}",

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T1 - Glassy statics and dynamics in the chemically ordered pyrochlore antiferromagnet Y2Mo2O7

AU - Gardner, J. S.

AU - Gaulin, B. D.

AU - Lee, S. H.

AU - Broholm, C.

AU - Raju, N. P.

AU - Greedan, J. E.

PY - 1999

Y1 - 1999

N2 - Static and dynamic magnetic correlations in the geometrically frustrated pyrochlore antiferromagnet Y2Mo2O7 have been studied using neutron scattering. The material is chemically ordered but displays a spin-freezing transition at Tg∼22.5K. We show that dynamic short range order develops below room temperature. Upon cooling the two-spin correlation length never exceeds 5 Å, yet the spin fluctuation rate vanishes in proportion to T−Tg. For Tg low energy spin fluctuations are replaced by static antiferromagnetic short range order with a frozen staggered magnetization |⟨S⟩|/S≈0.67(2). Locally the frozen spin structure corresponds to four sublattice ordering with zero magnetization.

AB - Static and dynamic magnetic correlations in the geometrically frustrated pyrochlore antiferromagnet Y2Mo2O7 have been studied using neutron scattering. The material is chemically ordered but displays a spin-freezing transition at Tg∼22.5K. We show that dynamic short range order develops below room temperature. Upon cooling the two-spin correlation length never exceeds 5 Å, yet the spin fluctuation rate vanishes in proportion to T−Tg. For Tg low energy spin fluctuations are replaced by static antiferromagnetic short range order with a frozen staggered magnetization |⟨S⟩|/S≈0.67(2). Locally the frozen spin structure corresponds to four sublattice ordering with zero magnetization.

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EP - 214

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JF - Physical Review Letters

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ER -

Glassy statics and dynamics in the chemically ordered pyrochlore antiferromagnet Y₂Mo₂O₇

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