Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9837952 | Physica B: Condensed Matter | 2005 | 5 Pages |
Abstract
The magnetic structure of a single crystal MnSi has been studied by small angle diffraction with polarised neutrons within the temperature range from 10 K to TC=28.7 K and the magnetic field H from 1 to 800 mT. The magnetic structure of MnSi in zero magnetic field is a long-period spin spiral with the propagation vector along the [1 1 1] axis caused by the Dzialoshinskii-Moriya interaction. The single crystal was oriented in such a way that two axes [1 1 1] and [111¯] were set in a plane perpendicular to the incident beam. This particular geometry allows one to observe four major diffraction peaks at ±q1 and ±q2 along the axes and four minor peaks at q=±q1±q2 explained as a result of double scattering. The magnetic field H along the polarisation vector P0 has been set in four different directions of interest: parallel to the axes [1 1 0], [0 0 1], [1 1 1] and perpendicular to the last one. The intensity Ip=I(+P0)+I(-P0), the “polarization” PA=[I(+P0)-I(-P0)]/Ip and position qp of the peaks were studied as a function of the temperature and magnetic field.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
A.I. Okorokov, S.V. Grigoriev, Yu. O. Chetverikov, S.V. Maleyev, R. Georgii, P. Böni, D. Lamago, H. Eckerlebe, K. Pranzas,