Abrupt but continuous antiferromagnetic transition in nearly stoichiometric La2CuO4+

D. E. MacLaughlin, J. P. Vithayathil, H. B. Brom, J. C.J.M. De Rooy, P. C. Hammel, P. C. Canfield, A. P. Reyes, Z. Fisk, J. D. Thompson, S. W. Cheong

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37 Scopus citations

Abstract

Zero-field La139 nuclear quadrupole resonance (NQR) has been used to characterize the antiferromagnetic transition in nearly stoichiometric single crystals of La2CuO4+ (Néel temperatures TN between 275 and 318 K). The onset of the NQR Zeeman splitting at TN is abrupt but continuous, indicative of a second-order phase transition with either a crossover in critical behavior just below TN or a very small critical exponent 0.1. The absence of any anomaly at TN in the La139 electric field gradient indicates no accompanying structural distortion.

Original languageEnglish (US)
Pages (from-to)760-763
Number of pages4
JournalPhysical review letters
Volume72
Issue number5
DOIs
StatePublished - 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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