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

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

2005-10-26

arxiv.org/abs/cond-mat/0510691v1

Phys. Rev. B 73, 020410(R) (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures. Submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevB.73.020410

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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