Two-dimensional coordination networks of 〔Mn4〕 single-molecule magnets: heat capacity measurements

• Fujisaki Tatsuya

  Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology

• Nakazawa Yasuhiro

  Department of Chemistry, Graduate School of Science, Osaka University CREST-JST

• Oguni Masaharu

  Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology

• Nakata Kazuya

  Department of Chemistry, Graduate School of Science, Tohoku University

• Yamashita Masahiro

  Department of Chemistry, Graduate School of Science, Tohoku University CREST-JST

• Lecren Lollita

  Université Bordeaux 1; CNRS, Centre de Recherche Paul Pascal—UPR8641

• Miyasaka Hitoshi

  Department of Chemistry, Graduate School of Science, Tohoku University CREST-JST

書誌事項

タイトル別名

• Two-Dimensional Coordination Networks of [Mn<SUB>4</SUB>] Single-Molecule Magnets: Heat Capacity Measurements
• Two dimensional coordination networks of Mn4 single molecule magnets heat capacity measurements

抄録

The magnetic-field dependences of heat capacities of two-dimensional (2D) network systems consisting of Mn₄ single-molecule magnets are studied at low temperatures between 0.6 and 10 K. Thermal anomalies associated with the formation of the antiferromagnetic order of large spins (S_T=9) mediated by the superexchange interactions are observed at 4.35 K for [Mn₄(hmp)₆{N(CN)₂}₂](ClO₄)₂ (hmp⁻ = 2-hydroxymethylpyridinate; N(CN)₂⁻ = dicyanamide) and 2.10 K for [Mn₄(hmp)₄Br₂(OMe)₂{N(CN)₂}₂]·2THF·0.5H₂O. They are suppressed by applying weak magnetic fields smaller than 1 T. In the case of [Mn₄(hmp)₄Br₂(OMe)₂{N(CN)₂}₂]·2THF·0.5H₂O, the entropy associated with the magnetic transition almost coincides with that of the ground-state doublet of S_z=±9. The coexistence of bulk-magnet characters and single-molecule magnet (SMM) characters in this network system gives an intrinsic peak broadening effect that resembles the finite-size effect in the magnetic nanoparticles.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 76 (10), 104602-104602, 2007

  一般社団法人 日本物理学会

キーワード

• heat capacities
• single-molecule magnet
• two-dimensional network compounds
• phase transition

詳細情報

• CRID: 1390001204195204608
• NII論文ID: 130005296562
• NII論文ID: 110006448313
• NII論文ID: 210000106920
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.76.104602
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 8948162
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8948162
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.76.104602
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可