Defect-induced short-range-order from a spin-ice related state in deformed pyrochlore Co2 (OH)3 Cl

X. G. Zheng, M. Hagihala, Tatsuya Kawae, C. N. Xu

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Recently, we observed a kagome-ice-like partial ferromagnetic order with coexisting fluctuation in a deformed pyrochlore structure Co2 (OH)3 Cl. Here, we show that when lattice defects are present, the remaining fluctuating spins in this material further freeze at lower temperatures below T< Tg =4 K after it initially freezes into the partial ferromagnetic order near TC =10 K. This low-temperature transition is glasslike requiring an extremely slow relaxation process in Co2 (OH)3 Cl. Enhanced disorder in (Co1-x Alx) 2 (OH)3 Cl leads to a short-range order for the fluctuating spins. This result can be considered as an interesting analogy to the low-temperature anomaly in defect-containing pure and doped water ice, especially in the light of its relevance to the problem of residual entropy in ice-water or spin-ice transition.

Original languageEnglish
Article number024418
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number2
DOIs
Publication statusPublished - Jan 17 2008

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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