Partially disordered state near ferromagnetic transition in MnSi
| dc.creator | Grigoriev, S. V. Maleyev S. V. | |
| dc.date | 2007-04-05 | |
| dc.date.accessioned | 2026-07-07T07:55:19Z | |
| dc.date.available | 2026-07-07T07:55:19Z | |
| dc.description | The polarized neutron scattering in helimagnetic MnSi at low $T$ reveals existence of a partially disordered chiral state at ambient pressure in the magnetic field applied along $<111>$ axis below the first order transition to the non-chiral ferromagnetic state. This unexpected phenomenon is explained by the analysis of the spin-wave spectrum. We demonstrate that the square of the spin-wave gap becomes negative under magnetic field applied along $<111>$ and $<110>$ but not along the $<100>$ direction. It is a result of competition between the spin-wave interaction and cubic anisotropy. This negative sign means an instability of the spin wave spectrum for the helix and leads to a destruction of the helical order, giving rise to the partially disordered state below the first order ferromagnetic transition. | |
| dc.description | 5 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/0704.0683 | |
| dc.identifier | http://arxiv.org/abs/0704.0683 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/126925 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Partially disordered state near ferromagnetic transition in MnSi | |
| dc.type | text |