Tetranuclear heterometallic cycle Dy2Cu2 and the corresponding polymer showing slow relaxation of magnetization reorientation

Sohei Ueki, Atsushi Okazawa, Takayuki Ishida*, Takashi Nogami, Hiroyuki Nojiri

*この研究の対応する著者

研究成果: Article査読

21 被引用数 (Scopus)

抄録

We prepared tetranuclear complexes [{Cu(emg)(Hemg)(ROH)}2{Dy(hfac)2(ROH)}2] (abbreviated as [Dy2Cu2]-R; R = Me, Et; H2emg = ethylmethylglyoxime) and the corresponding polymer [{Cu(dmg)(Hdmg)}2{Dy(hfac)2(CH3OH)}2]n · 2(MeOH) ([Dy2Cu2]n; H2dmg = dimethylglyoxime), which were characterized as analogs of the known [Gd2Cu2] monomer and polymer, respectively, by means of X-ray crystallographic analysis. The M-H curves clarified antiferromagnetic coupling between Dy and Cu in the [Dy2Cu2] motif, leading to the Dy magnetic moments aligned parallel ([Cu(↓)Dy(↑)Cu(↓)Dy(↑)]). Ac magnetic susceptibility measurements of [Dy2Cu2]-Me and [Dy2Cu2]n exhibited a χac (in-phase) decrease and a concomitant χac (out-of-phase) increase with an increase of frequency. Low-temperature magnetization measurements on [Dy2Cu2]n exhibited magnetic hysteresis, which is characteristic of single-chain magnets.

本文言語English
ページ(範囲)1970-1976
ページ数7
ジャーナルPolyhedron
26
9-11
DOI
出版ステータスPublished - 2007 6月 15
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 無機化学
  • 材料化学

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