Spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet compounds Fe1-xCoxSi studied by small-angle neutron scattering

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Spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet compounds Fe1-xCoxSi studied by small-angle neutron scattering. / Grigoriev, S. V.; Pschenichnyi, K. A.; Altynbaev, E. V.; Siegfried, S. A.; Heinemann, A.; Honnecker, D.; Menzel, D.

In: Physical Review B, Vol. 100, No. 9, 094409, 05.09.2019.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{b65d761a50514538a8b8ba092a622118,

title = "Spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet compounds Fe1-xCoxSi studied by small-angle neutron scattering",

abstract = "The spin wave stiffness was measured by small-angle neutron scattering method in the Dzyaloshinskii-Moriya helimagnet compounds Fe1-xCoxSi with x=0.25,0.30,0.50. It has been shown that the spin wave dispersion in the fully polarized state is anisotropic due to Dzyaloshinskii-Moriya interaction. It is reflected in the neutron scattering pattern as two circles for neutrons obtaining and losing the magnon energy, respectively. The centers of the circles are shifted by the momentum transfer oriented along the applied magnetic field H and equal to the wave vector of the spiral ±ks. The radius of the circles is directly related to the stiffness of spin waves and depends on the magnetic field. We have found that the spin-wave stiffness A change weakly with temperature for each individual compound. On the other hand, the spin-wave stiffness A increases linearly with x in contrast to the x dependences of the critical temperature Tc and the lowerature ordered moment. Experimentally obtained values of the stiffness A approve quantitative applicability of the Bak-Jensen model for the compounds under study.",

author = "Grigoriev, {S. V.} and Pschenichnyi, {K. A.} and Altynbaev, {E. V.} and Siegfried, {S. A.} and A. Heinemann and D. Honnecker and D. Menzel",

year = "2019",

month = sep,

day = "5",

doi = "10.1103/PhysRevB.100.094409",

language = "English",

volume = "100",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "9",

}

RIS

TY - JOUR

T1 - Spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet compounds Fe1-xCoxSi studied by small-angle neutron scattering

AU - Grigoriev, S. V.

AU - Pschenichnyi, K. A.

AU - Altynbaev, E. V.

AU - Siegfried, S. A.

AU - Heinemann, A.

AU - Honnecker, D.

AU - Menzel, D.

PY - 2019/9/5

Y1 - 2019/9/5

N2 - The spin wave stiffness was measured by small-angle neutron scattering method in the Dzyaloshinskii-Moriya helimagnet compounds Fe1-xCoxSi with x=0.25,0.30,0.50. It has been shown that the spin wave dispersion in the fully polarized state is anisotropic due to Dzyaloshinskii-Moriya interaction. It is reflected in the neutron scattering pattern as two circles for neutrons obtaining and losing the magnon energy, respectively. The centers of the circles are shifted by the momentum transfer oriented along the applied magnetic field H and equal to the wave vector of the spiral ±ks. The radius of the circles is directly related to the stiffness of spin waves and depends on the magnetic field. We have found that the spin-wave stiffness A change weakly with temperature for each individual compound. On the other hand, the spin-wave stiffness A increases linearly with x in contrast to the x dependences of the critical temperature Tc and the lowerature ordered moment. Experimentally obtained values of the stiffness A approve quantitative applicability of the Bak-Jensen model for the compounds under study.

AB - The spin wave stiffness was measured by small-angle neutron scattering method in the Dzyaloshinskii-Moriya helimagnet compounds Fe1-xCoxSi with x=0.25,0.30,0.50. It has been shown that the spin wave dispersion in the fully polarized state is anisotropic due to Dzyaloshinskii-Moriya interaction. It is reflected in the neutron scattering pattern as two circles for neutrons obtaining and losing the magnon energy, respectively. The centers of the circles are shifted by the momentum transfer oriented along the applied magnetic field H and equal to the wave vector of the spiral ±ks. The radius of the circles is directly related to the stiffness of spin waves and depends on the magnetic field. We have found that the spin-wave stiffness A change weakly with temperature for each individual compound. On the other hand, the spin-wave stiffness A increases linearly with x in contrast to the x dependences of the critical temperature Tc and the lowerature ordered moment. Experimentally obtained values of the stiffness A approve quantitative applicability of the Bak-Jensen model for the compounds under study.

UR - http://www.scopus.com/inward/record.url?scp=85072580418&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.100.094409

DO - 10.1103/PhysRevB.100.094409

M3 - Article

AN - SCOPUS:85072580418

VL - 100

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 9

M1 - 094409

ER -

ID: 76659159