Nuclear Quadrupole Resonance Study of a One-dimensional XY System: a Review (1,2) of Chlorine NQR in PrCl3*
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چکیده
H = S v i S v i + 1 ) y y corresponds to what is called the XY chain. The hexagonal compound PrCl3 provides a good approximation to the 1-D XY chain. The structure of PrCl3 is illustrated in Figure 1. Nearest neighbor Pr ions form chains along the hexagonal axis. Each Pr ion has nine close Cl neighbors which form three equilateral triangles; one triangle lies in the plane perpendicular to the hexagonal axis passing through the
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