Abstract
Synthesis, structure, and magnetic properties of a novel one-dimensional spin-1/2 quantum antiferromagnetic (AF) system BaCu2(Si1-xGex)2O7 (0≤x≤1) are reported. Contained in this system are corrugated CuO chains made of corner-sharing CuO4 squares with the dominant exchange interaction changing almost linearly 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). A rich magnetic phase diagram results from this strong composition dependence combined with the switching of the interchain interaction changing from ferromagnetic (x=0) to AF (x=1).
| Original language | English |
|---|---|
| Pages (from-to) | 101-109 |
| Number of pages | 9 |
| Journal | Journal of Solid State Chemistry |
| Volume | 156 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2001 Jan 1 |
| Externally published | Yes |
Keywords
- BaCu(SiGe)O
- Corner-sharing CuO squares
- Dzyaloshinsky - Moriya interaction
- Heisenberg antiferromagnetic chains
- Superexchange interactions
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry
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Cite this
Yamada, T., Hiroi, Z., & Takano, M. (2001). Spin-1/2 quantum antiferromagnetic chains with tunable superexchange interactions found in BaCu2(Si1-xGex)2O7. Journal of Solid State Chemistry, 156(1), 101-109. https://doi.org/10.1006/jssc.2000.8968