Two-dimensional S = 1 quantum antiferromagnet (NiCl)Sr2Ta 3O10

  • Yoshihiro Tsujimoto
  • , Atsushi Kitada
  • , Yasutomo J. Uemura
  • , Tatsuo Goko
  • , Adam A. Aczel
  • , Travis J. Williams
  • , Graeme M. Luke
  • , Yasuo Narumi
  • , Koichi Kindo
  • , Masakazu Nishi
  • , Yoshitami Ajiro
  • , Kazuyoshi Yoshimura
  • , Hiroshi Kageyama

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

A topotactic ion-exchange reaction of a layered perovskite RbSr 2Ta3O10 with NiCl2 yielded a novel two-dimensional nickel-oxyhalide (NiCl)Sr2Ta3O 10, the first S = 1 compound among related series of metal-oxyhalides. The room temperature structure is isostructural with (CuCl)Ca2Nb3O10 adopting the space group P4/mmm. We found a possible structural transition at 230 K that does not lead to drastic changes in magnetic character such as nickel clustering. Despite a large Weiss temperature of θ =-125 K, magnetic long-range order is significantly suppressed down to TN1 ≈ 50 K because of two-dimensionality and strong frustration. The magnetically ordered state below TN1 has a partial volume fraction coexisting with a paramagnetic component, followed by complete long-range ordering below TN2 = 20 K. The reaction process and requirement will also be discussed.

Original languageEnglish
Pages (from-to)4625-4631
Number of pages7
JournalChemistry of Materials
Volume22
Issue number16
DOIs
StatePublished - Aug 24 2010
Externally publishedYes

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