Short-range quasistatic order and critical spin correlations in α-Ru1−xIrxCl3


Short-range quasistatic order and critical spin correlations in α-Ru1−xIrxCl3

Do, S.-H.; Lee, W.-J.; Lee, S.; Choi, Y. S.; Lee, K.-J.; Gorbunov, D. I.; Wosnitza, J.; Suh, B. J.; Choi, K.-Y.

The magnetic ground states of the diluted α-Ru1−x IrxCl3 are systematically investigated by magnetization, specific heat, and muon spin rotation measurements. Introduction of moderate spin vacancies leads to a destabilization of the zigzag antiferromagnetic order towards a short-range ordered state. It is remarkable that the x = 0.2 sample located near a quantum critical point shows an extremely short correlation length of the magnitude of magnetic moments ζmag ∼ 1.2a (a = lattice spacing) and a power-law behavior of the magnetic susceptibility χ(T ) ∼ T−p below 14 K for μ0HIIab and below 30 K for μ0HIIc. Our work demonstrates that the α-Ru1−x IrxCl3 system hosts a short-range, quasistatic order characterized by critical spin correlations.

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Publ.-Id: 27790