Magnetic field and pressure dependence of small angle neutron scattering in MnSi |
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Authors: | Pfleiderer C Reznik D Pintschovius L Haug J |
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Institution: | Physikalisches Institut, Universit?t Karlsruhe, Wolfgang-Gaede-Str. 1, D-76128 Karlsruhe, Germany. |
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Abstract: | We report small angle neutron scattering of spontaneous and magnetic field aligned components of the helical spin polarization in MnSi for temperatures T down to 0.35 K, at pressures p up to 21 kbar, and magnetic field B up to 0.7 T. The parameter range of our study spans the first order transition between helical order and partial magnetic order at p{c}=14.6 kbar, which coincides with the onset of an extended regime of non-Fermi liquid resistivity. Our study suggests that MnSi above p{c} is not dominated by the remnants of the first order transition at p{c}, but that an unidentified mechanism favors stabilization of a new ground state other than helical order. |
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