Cu_3(tmen)_3(tma)_2(H_2O)_2 ·6.5H_2O - New S = 1/2 "Sawtooth" Chain?

• Authors: P. Vrábel , A. Orendáčová , J. Černák , M. Orendáč
• Languages of publication: EN

Abstracts

EN

The results of the investigation of magnetic susceptibility, magnetization and specific heat of Cu_3(tmen)_3(tma)_2(H_2O)_2·6.5H_2O (tmen = N,N,N',N'-tetramethylethane-1,2 diamine; H_3tma = 1,3,5-benzenetricarboxylic acid) are reported. The spatial arrangement of magnetic Cu(II) ions and network of covalent bonds suggest that the studied material might be a representative of S = 1/2 sawtooth chain with moderate exchange coupling J/k_{B}. The investigation of the temperature dependence of susceptibility and magnetic field dependence of magnetization yielding J/k_{B} ≈ - 0.63 K is consistent with the structural features. In addition, specific heat data reveal short-range correlations in milikelvin temperature range and indicate long-range ordering below 150 mK.

Keywords

EN

75.10.Jm; 75.10.Pq; 75.30.Et

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.10.Pq: Spin chain models
• 75.10.Jm: Quantized spin models, including quantum spin frustration

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 993-994

Dates

published

2010-11

Contributors

author

P. Vrábel

• Centre of Low Temperature Physics, P.J. Šafárik University & IEP SAS, Park Angelinum 9, SK-04154 Košice, Slovakia

author

A. Orendáčová

• Centre of Low Temperature Physics, P.J. Šafárik University & IEP SAS, Park Angelinum 9, SK-04154 Košice, Slovakia

author

J. Černák

• Institute of Chemistry, P.J. Šafárik University, Moyzesova 11, SK-04154 Košice, Slovakia

author

M. Orendáč

• Centre of Low Temperature Physics, P.J. Šafárik University & IEP SAS, Park Angelinum 9, SK-04154 Košice, Slovakia

References

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Identifiers

DOI

10.12693/APhysPolA.118.993