We present 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 vertical bar J'vertical bar/k(B)=0.046 K and to a ratio of vertical bar J'/J vertical bar=4.4x10(-3).
Original Publication Title
Physical Review B
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Lancaster, T; Blundell, S J.; Brooks, M L.; Baker, P J.; Pratt, F L.; Manson, Jamie L.; Landee, C P.; and Baines, C, "Magnetic Order In The Quasi-One-Dimensional Spin-1/2 Molecular Chain Compound Copper Pyrazine Dinitrate" (2006). Chemistry and Biochemistry Faculty Publications. 8.