Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Spin-wave dynamics in the helimagnet FeGe studied by small-angle neutron scattering. / Siegfried, S. A.; Sukhanov, A. S.; Altynbaev, E. V.; Honecker, D.; Heinemann, A.; Tsvyashchenko, A. V.; Grigoriev, S. V.
в: Physical Review B, Том 95, № 13, 134415, 12.04.2017.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Spin-wave dynamics in the helimagnet FeGe studied by small-angle neutron scattering
AU - Siegfried, S. A.
AU - Sukhanov, A. S.
AU - Altynbaev, E. V.
AU - Honecker, D.
AU - Heinemann, A.
AU - Tsvyashchenko, A. V.
AU - Grigoriev, S. V.
N1 - Publisher Copyright: © 2017 American Physical Society.
PY - 2017/4/12
Y1 - 2017/4/12
N2 - We have studied the spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet FeGe in a temperature range from 225 K up to TC≈278.7K by small-angle neutron scattering. The method we have used is based on [Grigoriev, Phys. Rev. B 92, 220415(R) (2015)PRBMDO1098-012110.1103/PhysRevB.92.220415] 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]meVÅ2. The finite value of the spin-wave stiffness A=58meVÅ2 at TC classifies the order-disorder phase transition in FeGe as being the first-order one.
AB - We have studied the spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet FeGe in a temperature range from 225 K up to TC≈278.7K by small-angle neutron scattering. The method we have used is based on [Grigoriev, Phys. Rev. B 92, 220415(R) (2015)PRBMDO1098-012110.1103/PhysRevB.92.220415] 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]meVÅ2. The finite value of the spin-wave stiffness A=58meVÅ2 at TC classifies the order-disorder phase transition in FeGe as being the first-order one.
UR - http://www.scopus.com/inward/record.url?scp=85017521880&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.95.134415
DO - 10.1103/PhysRevB.95.134415
M3 - Article
AN - SCOPUS:85017521880
VL - 95
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 13
M1 - 134415
ER -
ID: 86153682