Heat capacities of a networked system of single-molecule magnet with three-dimensional structure

S. Yamashita, K. Hino, Y. Inoue, Y. Okada, R. Hirahara, Y. Nakazawa, H. Miyasaka, M. Yamashita

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A magnetic-fields dependence of heat capacity of [Mn5(hmp) 4(OH)2{N(CN)2}6]2MeCN•2THF (hmp=hydroxymethylpyridinate) is investigated by the thermal relaxation calorimetry technique. This compound is a three-dimensional system consisting of Mn4 single-molecule magnet (SMM) units and Mn2+ ions, which are linked by the dicyanamide ligands to form a coordination network structure. A sharp peak of C p being associated with the formation of three-dimensional long-range order is observed around 1.96 K. The thermodynamic discussion based on the magnetic entropy suggests that both SMMs and Mn 2+ ions are involved in the formation of the anitiferromagnetic spin ordering. However, this long-range ordering is very sensitive to the external magnetic fields which work to change the magnitude of the Zeeman splitting of the SMM levels. The behavior under magnetic fields is similar to that of the two-dimensional Mn4-network system studied previously.

Original languageEnglish
Pages (from-to)439-442
Number of pages4
JournalJournal of Thermal Analysis and Calorimetry
Issue number2
Publication statusPublished - 2008 May
Externally publishedYes


  • Heat capacity
  • Ising model
  • Relaxation calorimetry
  • Single-molecule magnet

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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