title: Magnetic field and pressure dependence of small angle neutron scattering in MnSi.
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.
authors.affiliation: Physikalisches Institut, Universität Karlsruhe, Wolfgang-Gaede-Str. 1, D-76128 Karlsruhe, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Pfleiderer
authors.forename: D
authors.initials: D
authors.lastname: Reznik
authors.forename: L
authors.initials: L
authors.lastname: Pintschovius
authors.forename: J
authors.initials: J
authors.lastname: Haug