Pressure effects on Mn4 single-molecule magnet with two-dimensional correlation

M. Ogawa, M. Mito, T. Tajiri, H. Deguchi, S. Takagi, K. Nakata, M. Yamashita, H. Miyasaka

研究成果: Article査読

2 被引用数 (Scopus)

抄録

We have investigated the magnetic properties of two-dimensional networked single-molecule magnet, [Mn4(hmp)4Br2(OMe)2(dcn)2]·0.5H2O·2THF (Hmp=2-hydroxymethylpyridine, dcn=dicyanamide, THF=tetrahydrofuran), through the AC susceptibility measurements up to P=15.3 kbar. This compound exhibits superparamagnetic relaxation phenomenon below 3 K, and the blocking temperature (TB) in low frequency limit is estimated to be 2.00 K at ambient pressure. As pressure increases, the TB once decreases and, at around P=3 kbar, it turns to increase. At P=15.3 kbar, the TB reaches 2.27 K. By analyzing the frequency dependence of TB, it has been revealed that a dynamical critical exponent of the power-law fitting shows the change of up and down, and it approaches 2.0 at last. This result suggests that the intercluster magnetic network changes by pressurization and finally a conventional phase transition may be realized.

本文言語English
ページ(範囲)e489-e491
ジャーナルJournal of Magnetism and Magnetic Materials
310
2 SUPPL. PART 2
DOI
出版ステータスPublished - 2007 3月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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