Novel spin-dimer system of a microporous polyborate NaCuB7O 12.nH2O

Jing Ju, Juns Sasaki, Naoki Toyota, Katsumi Tanigaki

Research output: Contribution to journalConference articlepeer-review


A new microporous polyborate, NaCuB7O12.nH 2O, is synthesized using boric acid as a flux. It contains a 14-membered ring framework built up by CuO6 octahedra, BO4 tetrahedra and BO3 triangles. The spin-1/2 dimers of Cu2+ ions are connected by BO3 to form an infinite ladder along the b-axis. Magnetic susceptibility data between 2 and 330 K are presented, and the data are accurately fitted by theoretical predictions of Bleaney-Bowers for the spin-1/2 dimer, with J/kB = -153.8 K, and g = 1.98, where J is the intradimer exchange interaction constant and g is the Landé g factor.

Original languageEnglish
Pages (from-to)15-19
Number of pages5
JournalMaterials Research Society Symposium Proceedings
Publication statusPublished - 2008 Dec 1
EventNanoscale Magnetic Materials and Applications - Boston, MA, United States
Duration: 2007 Nov 262007 Nov 30

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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