Critical scattering in a quasi-two-dimensional antiferromagnet

Critical dynamics of a layered insulating antiferromagnet Pr 2CuO 4 with weak interlayer coupling has been studied in the vicinity of the quantum critical point ( H C∼3 T at T=0) by scattering of cold neutrons. The correlation length of the inter-plane copper spins fluctuations was observed to incre...

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Bibliographic Details
Published in:	Journal of magnetism and magnetic materials Vol. 272; pp. 220 - 222
Main Authors:	Ivanov, Alexandre, Petitgrand, Daniel
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-05-2004
Subjects:	Low-dimesional magnets Magnetic fluctuations Neutron scattering Quantum critical point Quantum critical point Neutron scattering Magnetic fluctuations 78.70.Nx Low-dimesional magnets 75.40.Cx 74.72.Jt
Online Access:	Get full text
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Summary:	Critical dynamics of a layered insulating antiferromagnet Pr 2CuO 4 with weak interlayer coupling has been studied in the vicinity of the quantum critical point ( H C∼3 T at T=0) by scattering of cold neutrons. The correlation length of the inter-plane copper spins fluctuations was observed to increase dramatically at H C, together with the peak and integral scattering intensity. The energy width of the critical scattering was found to be resolution limited indicating long (>10 −10 s) correlation times.
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2003.12.1143