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Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4

Y. Chen·Wei Bao·Y. Qiu·J. E. Lorenzo·J. L. Sarrao·D. L. Ho·Min Y. Lin
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Abstract

In conventional spin glasses, the magnetic interaction is not strongly anisotropic and the entire spin system freezes at low temperature. In La2(Cu,Li)O4, for which the in-plane exchange interaction dominates the interplane one, only a fraction of spins with antiferromagnetic correlations extending to neighboring planes become spin-glass. The remaining spins with only in-plane antiferromagnetic correlations remain spin-liquid at low temperature. Such a novel partial spin freezing out of a spin-liquid observed in this cold neutron scattering study is likely due to a delicate balance between disorder and quantum fluctuations in the quasi-two dimensional S=1/2 Heisenberg system.

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Y. Chen, Wei Bao, Y. Qiu, J. E. Lorenzo, J. L. Sarrao, D. L. Ho, Min Y. Lin. 2005-03-08. Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4. https://doi.org/10.1103/physrevb.72.184401

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