Spin-1/2 quantum antiferromagnetic chains with adjustable superexchange interactions found in BaCu2(Si1-xGex) 2O7

Takahiro Yamada, Mikio Takano, Zenji Hiroi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Synthesis, structure, and magnetic properties of a novel one-dimensional spin-1/2 quantum antiferromagnetic (AF) system BaCu2(Si1-xGex)2 O7 (0≤x≤1) are reported. Contained in this system are corrugated CuO3 chains made of corner-sharing CuO4 squares, with the dominant exchange interactions being found to change almost linearly with the composition between 290 K (x = 0) and 580 K (x = 1). Anomalies in susceptibility and specific heat, indicative of the occurrence of a long-range AF ordering, are observed at 8.9 K (x = 0) and 8.6 K (x = 1).

Original languageEnglish
Pages (from-to)171-176
Number of pages6
JournalJournal of Alloys and Compounds
Volume317-318
DOIs
Publication statusPublished - 2001 Apr 12
Externally publishedYes

Keywords

  • CuO chain
  • Cupric oxide
  • Quantum spin system

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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