Muons and magnets

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Lattice-Site-Specific Spin Dynamics in Double Perovskite Sr2CoOsO6

Physical Review Letters American Physical Society (APS) 112:14 (2014) 147202

Authors:

Binghai Yan, Avijit Kumar Paul, Sudipta Kanungo, Manfred Reehuis, Andreas Hoser, Daniel M Többens, Walter Schnelle, Robert C Williams, Tom Lancaster, Fan Xiao, Johannes S Möller, Stephen J Blundell, William Hayes, Claudia Felser, Martin Jansen
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Frustrated Spin Systems (2nd ed.), edited by H.T. Diep

Contemporary Physics Taylor & Francis 55:2 (2014) 148-149
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Statistical Mechanics of Magnetic Excitations, From Spin Waves to Stripes and Checkerboards, by Enrico Rastelli

Contemporary Physics Taylor & Francis 55:2 (2014) 152-153
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Dipolar ordering in a molecular nanomagnet detected using muon spin relaxation

Physical Review B American Physical Society (APS) 89:14 (2014) 144420

Authors:

FL Pratt, E Micotti, P Carretta, A Lascialfari, P Arosio, T Lancaster, SJ Blundell, AK Powell
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Local magnetism and spin correlations in the geometrically frustrated cluster magnet LiZn 2 Mo3 O8

Physical Review B - Condensed Matter and Materials Physics 89:6 (2014)

Authors:

JP Sheckelton, FR Foronda, L Pan, C Moir, RD McDonald, T Lancaster, PJ Baker, NP Armitage, T Imai, SJ Blundell, TM McQueen

Abstract:

LiZn2Mo3O8 has been proposed to contain S=Mo3O13 magnetic clusters arranged on a triangular lattice with antiferromagnetic nearest-neighbor interactions. Here, microwave and terahertz electron spin resonance, Li7 nuclear magnetic resonance, and muon spin rotation spectroscopies are used to characterize the local magnetic properties of LiZn2Mo3O8. These results show the magnetism in LiZn2Mo3O8 arises from a single isotropic S=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 LiZn2Mo3O8. © 2014 American Physical Society.
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