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Durham University

Department of Physics

Staff profile

Publication details for Professor Tom Lancaster

Sheckelton, J.P., Foronda, F.R. Pan, L.D. Moir, C., McDonald, R.D. Lancaster, T., Baker, P.J. Armitage, N.P. Imai, T., Blundell, S.J. & McQueen, T.M. (2014). Local magnetism and spin correlations in the geometrically frustrated cluster magnet LiZn2Mo3O8. Physical Review B: condensed matter and materials physics 89(6): 064407.

Author(s) from Durham

Abstract

LiZn 2 Mo 3 O 8 has been proposed to contain S=½ Mo 3 O 13 magnetic clusters arranged on a triangular lattice with antiferromagnetic nearest-neighbor interactions. Here, microwave and terahertz electron spin resonance, Li 7 nuclear magnetic resonance, and muon spin rotation spectroscopies are used to characterize the local magnetic properties of LiZn 2 Mo 3 O 8 . These results show the magnetism in LiZn 2 Mo 3 O 8 arises from a single isotropic S=½ electron per cluster and that there is no static long-range magnetic ordering down to T = 0.07 K. Further, there is evidence of gapless spin excitations with spin fluctuations slowing down as the temperature is lowered. These data indicate strong spin correlations, which, together with previous data, suggest a low-temperature resonating valence-bond state in LiZn 2 Mo 3 O 8 .