Anisotropic spin freezing in the S=1/2 zigzag chain compound SrCuO2

I. A. Zaliznyak, C. Broholm, M. Kibune, M. Nohara, H. Takagi

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We characterize an unusual magnetic phase in orthorhombic SrCuO2 using neutron scattering. SrCuO2 contains zigzag spin chains formed by pairs of linear S=1/2 chains (J=180 meV) coupled through a frustrated interaction (|J’| ≲ 0.1J). For T < Tc1=5.0(4) K, an elastic peak develops in a gapless spectrum indicating spin freezing on a time scale δ t > 210-10 s. While the frozen state has long range order along chains (ξc > 200c) and a substantial correlation length, ξa = 60(25)a perpendicular to zigzag planes, the correlation length is only ξb = 2.2(3)b in the direction of frustrated interactions. We argue that slow dynamics of stripelike cooperative magnetic defects yield this anisotropic frozen state.

Original languageEnglish
Pages (from-to)5370-5373
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number25
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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