| Reference : Spin-wave dynamics in the helimagnet FeGe studied by small-angle neutron scattering |
| Scientific journals : Other | |||
| Physical, chemical, mathematical & earth Sciences : Physics | |||
| Physics and Materials Science | |||
| http://hdl.handle.net/10993/41171 | |||
| Spin-wave dynamics in the helimagnet FeGe studied by small-angle neutron scattering | |
| English | |
| Siegfried, S.-A. [> >] | |
| Sukhanov, A. S. [> >] | |
| Altynbaev, E. V. [> >] | |
Honecker, Dirk [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit] | |
| Heinemann, A. [> >] | |
| Tsvyashchenko, A. V. [> >] | |
| Grigoriev, S. V. [> >] | |
| 2017 | |
| PHYSICAL REVIEW B | |
| 95 | |
| 13 | |
| 134415 | |
| Yes (verified by ORBilu) | |
| International | |
| 2469-9950 | |
| [en] We have studied the spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet FeGe in a temperature
range from 225 K up to TC ≈ 278.7 K by small-angle neutron scattering. The method we have used is based on [Grigoriev et al., Phys. Rev. B 92, 220415(R) (2015)] and was extended here for the application in polycrystalline samples. We confirm the validity of the anisotropic spin-wave dispersion for FeGe caused by the Dzyaloshinskii-Moriya interaction. We have shown that the spin-wave stiffness A for the FeGe helimagnet decreases with a temperature as A(T ) = 194[1 − 0.7(T/TC)4.2] meV °A2. The finite value of the spin-wave stiffness A = 58 meV °A2 at TC classifies the order-disorder phase transition in FeGe as being the first-order one. | |
| http://hdl.handle.net/10993/41171 | |
| 10.1103/PhysRevB.95.134415 |
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