Structural and dynamical study of moment localization in beta-Mn(1-x)In(x)

Details Structural and dynamical study of moment localization in beta-Mn(1-x)In(x) Structural and dynamical study of moment localization in beta-Mn(1-x)In(x)

2010-07-28

arxiv.org/abs/1007.5013v2

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

We have used neutron scattering and muon spin relaxation (muSR) to investigate the structural and magnetic properties of the beta-phase of elemental manganese doped with dilute amounts of indium. beta-Mn is an example of a topologically frustrated antiferromagnetically correlated metal - but which remains paramagnetic at all temperatures. The addition of In to beta-Mn results in a vast volume expansion of the lattice, and would therefore be expected to have a major effect on the stability and localization of the Mn moment - as observed in, for example, Ru and Al doped beta-Mn alloys. We find that In doping in beta-Mn results in a short-range ordered spin-glass like ground state, similar to that of Al-doped beta-Mn but with residual low frequency spin fluctuations. This is in contrast to Ru doping which results in the stabilization of a long-range ordered Mn moment

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