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Magnetic order in the quasi-one-dimensional spin 1/2 chain, copper pyrazine dinitrate

T. Lancaster·S. J. Blundell·M. L. Brooks·P. J. Baker·F. L. Pratt·J. L. Manson·C. P. Landee·C. Baines
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Abstract

We present the first evidence of magnetic order in the quasi-one-dimensional spin 1/2 molecular chain compound, copper pyrazine dinitrate Cu(C4H4N2)(NO3)2}. Zero field muon-spin relaxation measurements made at dilution refrigerator temperatures show oscillations in the measured asymmetry, characteristic of a quasistatic magnetic field at the muon sites. Our measurements provide convincing evidence for long range magnetic order below a temperature T_N=107(1) mK. This leads to an estimate of the interchain coupling constant of |J'|/k_B=0.046 K and to a ratio |J'/J| = 4.4 x 10^-3.

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T. Lancaster, S. J. Blundell, M. L. Brooks, P. J. Baker, F. L. Pratt, J. L. Manson, C. P. Landee, C. Baines. 2005-10-26. Magnetic order in the quasi-one-dimensional spin 1/2 chain, copper pyrazine dinitrate. https://doi.org/10.1103/physrevb.73.020410

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