Magnetization process of an S = 1/2 tetramer chain with ferromagnetic-ferromagnetic-antiferromagnetic-antiferromagnetic bond alternating interactions

Masayuki Hagiwara, Yasuo Narumi, Kazuhiko Minami, Koichi Kindo, Hideaki Kitazawa, Hiroyuki Suzuki, Naoto Tsujii, Hideki Abe

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We report the results of magnetic susceptibility (χ) and high field magnetization measurements on single crystal samples of a copper chain compound Cu(3-Clpy)2(N3)2 (3-Clpy = 3-chloropyridine, C5H4NCl) that is regarded as an S = 1/2 tetramer chain with ferromagnetic-ferromagnetic-antiferrmagnetic-antiferromagnetic bond alternating interactions. As the temperature (T) is decreased, the χT exhibits a round minimum at about 10 K and a successive abrupt increase, which is typical of a quantum ferrimagnet. The magnetization curves up to 40 T in a pulsed magnetic field at 1.3 K shows a steep increase around zero field and a plateau up to 27 T followed by a steep increase before saturation. Since we observed large hystereses around zero field and saturation field in pulsed fields, we performed the magnetization measurements under static fields up to 35 T to get equilibrium magnetizations and compared them witn the calculated ones. The calculated magnetization at each magnetic site against magnetic fields indicates a spin reduction probably arising from the quantum many body effect except at the site which ferromagnetically couples to both neighboring sites.

Original languageEnglish
Pages (from-to)943-946
Number of pages4
Journaljournal of the physical society of japan
Volume72
Issue number4
DOIs
Publication statusPublished - 2003 Apr 1

Keywords

  • Bond alternation
  • Magnetization process
  • Quantum ferrimagnet

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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