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Unconventional magnetic properties of the weakly ferromagnetic metal BaIrO₃

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arxiv cond-mat/0504144 v1 pith:HZAHPNPM submitted 2005-04-06 cond-mat.str-el

Unconventional magnetic properties of the weakly ferromagnetic metal BaIrO₃

classification cond-mat.str-el
keywords magneticbairoferromagneticmetalpropertiestemperaturetransitionunconventional
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We present experimental evidence for small-moment magnetism below the ferromagnetic transition temperature (T_c3 = 183 K) in the quasi-one-dimensional metal BaIrO_3. Further, we identify rearrangement of the local magnetic moment distribution, which leaves the bulk magnetization unchanged, at the Mott-like transition (T_c1 = 26 K). These results are only possible via muon-spin relaxation ($\mu$SR) techniques, since neutron scattering studies are hindered by the large absorption of neutrons by Ir. The low temperature characteristics of this compound, as revealed by $\mu$SR, are unconventional, and suggest that its magnetic properties are driven by changes occuring at the Fermi surface due to the formation of a charge-density wave state.

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