Muon spin precession in ferromagnetic DyAl2

13th International Conference on Muon Spin Rotation, Relaxation and Resonance

Hartmann, O.^1 ; Kalvius, G.M.^2 ; Wäppling, R.^1

Department of Physics and Astronomy, Uppsala University, Uppsala

75120, Sweden^1

Physics Department, Technical University Munich, Garching

85747, Germany^2

关键词: Easy axis of magnetization;    Field components;    Field dependencies;    Paramagnetic state;    Precession frequency;    Relaxation rates;    Single-crystalline;    Temperature dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/551/1/012018/pdf
DOI  :  10.1088/1742-6596/551/1/012018

来源: IOP

【 摘 要 】

The Laves phase intermetallics REAl2 were studied by μSR over several decades. Results had mainly been obtained for the temperature and field dependencies of relaxation rates in the paramagnetic state. However, it turned out that spontaneous precession signals in the ordered magnetic state were very difficult to observe. We report here the observation a weak precession signal in a single crystalline sample of DyAl2. The precession signal seen has low asymmetry and is heavily damped. This is understood with the notion that the magnetic structure of DyAl2 splits the internal field at the interstitial muon stopping site into several components, and that of those only one of the field components leads to the visible precession signal. The observed temperature dependence of the precession frequency is compatible with the change of easy axis of magnetization at T 40K.