Small Angle Neutron Scattering Study near the Critical Field at Low Temperature in MnSi

Abstract

Small angle neutron scattering measurements in the chiral helimagnet MnSi were performed to investigate the magnetic state near the critical field at low temperature in which a unknow magnetic state was suggested theoretically. The magnetic Bragg reflections due to the conical phase were observed in the region, however, any other reflections due to a possible new magnetic state were not observed neither in the configurations H // [111] ⏊ k i or H // [111] // k i , where k i is the incident neutron beam vector. It suggests the new magnetic state has a different nature from the typical magnetic skyrmionic phase appearing in a small pocket near the magnetic transition temperature.