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Using the ferromagnetic stability condition, the phase diagram is investigated in a quenched bond-mixed Ising ferromagnet with a transverse field \(\) on the square lattice. The fact that large families of critical lines for negative-bond mixture meet at a single point on the line of T =0 is found to be closely related with frustrations due to negative bond. However the effect of frustrations may be observed only for a small value of \(\) on the relevant physical properties.
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Sarmento et al. (1985) studied this question.
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