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Frustrated Zig-Zag Spin Chains Formed by Hydrogen Bonds in [Cu(H₂O)(OH)(tmen)]₂[Pd(CN)₄]·2H₂O

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Čižmár E., Orendáčová A., Orendáč M., Kuchár J., Feher A., Park J., Meisel M.

Acta Physica Polonica A

2017

vol. 131

issue 4

940-942

The magnetic properties of the novel dimeric compound [Cu(H₂O)(OH)(tmen)]₂[Pd(CN)₄]·2H₂O (tmen=N,N,N',N'-tetramethylethylenediamine) with modulated crystal structure were studied in the temperature range from 95 mK to 300 K. Magnetic measurements revealed a presence of weak antiferromagnetic exchange coupling in the compound. The temperature dependence of specific heat is characterized by the presence of a Schottky-like maximum at 0.47 K and a λ-anomaly at 0.28 K, indicating the formation of long-range order in the system. The comparison of the experimental data with theoretical predictions revealed the presence of antiferromagnetic intradimer exchange coupling J/k_{B}= -1.2 K and interdimer coupling of a similar strength mediated via hydrogen bonds between dimeric units forming a frustrated magnetic zig-zag chain structure.

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1 Acta Physica Polonica A

1 2017

1 Feher A.

1 Kuchár J.

1 Meisel M.

1 Orendáč M.

1 Orendáčová A.

1 Park J.

1 Čižmár E.

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Frustrated Zig-Zag Spin Chains Formed by Hydrogen Bonds in [Cu(H₂O)(OH)(tmen)]₂[Pd(CN)₄]·2H₂O