Ferromagnetic ordering in a new nickel polyborate NiB12O 14(OH)10

Jing Ju, Jun Sasaki, Tao Yang, Shinya Kasamatsu, Eiichi Negishi, Guobao Li, Jianhua Lin, Hiroyuki Nojiri, Takeshi Rachi, Katsumi Tanigaki, Naoki Toyota

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A new nickel polyborate, NiB12O14(OH)10 was synthesized using boric acid as a flux. This material has two-dimensional borate layers with a quasi-square lattice of Ni2+. The Ni 2+ ions locate in the plane of the two-dimensional layer, bridged through BnOn+1 chains in the plane and connected with the three-membered ring borate groups out of the plane. The dc and ac magnetic susceptibility, magnetization and specific heat measurements show that this material undergoes a weak ferromagnetic phase transition at Tc = 5.8 K. At T < Tc, a metamagnetic phase transition is observed at about 5 T, associated by a spin-flop, suggesting the ferromagnetic ordering is induced by an antiferromagnetic interaction. A broad maximum in the ac susceptibility at TM = 23-24 K indicates an intermediate short-range ordering.

Original languageEnglish
Pages (from-to)1597-1601
Number of pages5
JournalDalton Transactions
Volume6
Issue number13
DOIs
Publication statusPublished - 2006 Mar 24

ASJC Scopus subject areas

  • Inorganic Chemistry

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