Study of the Spin-Wave Dynamics of Amorphous Ferromagnets and Helimagnets with the Dzyaloshinskii‒Moriya Interaction

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Study of the Spin-Wave Dynamics of Amorphous Ferromagnets and Helimagnets with the Dzyaloshinskii‒Moriya Interaction. / Grigoriev, S. V.; Altynbaev, E. V.; Pshenichnyi, K. A.

In: Crystallography Reports, Vol. 67, No. 1, 01.02.2022, p. 81-92.

Research output: Contribution to journal › Review article › peer-review

BibTeX

@article{4a1880f390154d74b5363914d7b0cae6,

title = "Study of the Spin-Wave Dynamics of Amorphous Ferromagnets and Helimagnets with the Dzyaloshinskii‒Moriya Interaction",

abstract = "Abstract: The “inclined” dynamics method developed for studying spin waves in ferromagnets was proposed and implemented at the Leningrad Nuclear Physics Institute in Gatchina in the mid-1980s. The method is based on the analysis of the left-right asymmetry in magnetic scattering of polarized neutrons, which occurs when the magnetization direction in a sample is inclined with respect to the wave vector of the incident beam. Neutron scattering by spin waves is concentrated inside a cone bounded by a critical (cutoff) angle equal to the magnon-to-neutron mass ratio. By measuring this ratio, the magnon mass and the spin wave stiffness in a ferromagnetic material are found. The experiments on measuring the spin wave stiffness in helimagnets with the Dzyaloshinskii–Moriya interaction by the method of small-angle polarized neutron scattering show the validity of quadratic dispersion law shifted in the field direction by the value of the spiral wave vector: (Formula presented.). The spin wave stiffness has been measured as a function of temperature for binary and quasi-binary compounds: MnSi, Mn1-xFexSi, FeGe, Mn1-xFexGe, Fe1-xCoxSi, Cu2OSeO3.",

author = "Grigoriev, {S. V.} and Altynbaev, {E. V.} and Pshenichnyi, {K. A.}",

note = "Publisher Copyright: {\textcopyright} 2022, Pleiades Publishing, Inc.",

year = "2022",

month = feb,

day = "1",

doi = "10.1134/s1063774522010059",

language = "English",

volume = "67",

pages = "81--92",

journal = "Crystallography Reports",

issn = "1063-7745",

publisher = "МАИК {"}Наука/Интерпериодика{"}",

number = "1",

}

RIS

TY - JOUR

T1 - Study of the Spin-Wave Dynamics of Amorphous Ferromagnets and Helimagnets with the Dzyaloshinskii‒Moriya Interaction

AU - Grigoriev, S. V.

AU - Altynbaev, E. V.

AU - Pshenichnyi, K. A.

PY - 2022/2/1

Y1 - 2022/2/1

N2 - Abstract: The “inclined” dynamics method developed for studying spin waves in ferromagnets was proposed and implemented at the Leningrad Nuclear Physics Institute in Gatchina in the mid-1980s. The method is based on the analysis of the left-right asymmetry in magnetic scattering of polarized neutrons, which occurs when the magnetization direction in a sample is inclined with respect to the wave vector of the incident beam. Neutron scattering by spin waves is concentrated inside a cone bounded by a critical (cutoff) angle equal to the magnon-to-neutron mass ratio. By measuring this ratio, the magnon mass and the spin wave stiffness in a ferromagnetic material are found. The experiments on measuring the spin wave stiffness in helimagnets with the Dzyaloshinskii–Moriya interaction by the method of small-angle polarized neutron scattering show the validity of quadratic dispersion law shifted in the field direction by the value of the spiral wave vector: (Formula presented.). The spin wave stiffness has been measured as a function of temperature for binary and quasi-binary compounds: MnSi, Mn1-xFexSi, FeGe, Mn1-xFexGe, Fe1-xCoxSi, Cu2OSeO3.

AB - Abstract: The “inclined” dynamics method developed for studying spin waves in ferromagnets was proposed and implemented at the Leningrad Nuclear Physics Institute in Gatchina in the mid-1980s. The method is based on the analysis of the left-right asymmetry in magnetic scattering of polarized neutrons, which occurs when the magnetization direction in a sample is inclined with respect to the wave vector of the incident beam. Neutron scattering by spin waves is concentrated inside a cone bounded by a critical (cutoff) angle equal to the magnon-to-neutron mass ratio. By measuring this ratio, the magnon mass and the spin wave stiffness in a ferromagnetic material are found. The experiments on measuring the spin wave stiffness in helimagnets with the Dzyaloshinskii–Moriya interaction by the method of small-angle polarized neutron scattering show the validity of quadratic dispersion law shifted in the field direction by the value of the spiral wave vector: (Formula presented.). The spin wave stiffness has been measured as a function of temperature for binary and quasi-binary compounds: MnSi, Mn1-xFexSi, FeGe, Mn1-xFexGe, Fe1-xCoxSi, Cu2OSeO3.

UR - http://www.scopus.com/inward/record.url?scp=85124941503&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/f742a917-b1fa-3429-bcec-46cf2229ee4b/

U2 - 10.1134/s1063774522010059

DO - 10.1134/s1063774522010059

M3 - Review article

AN - SCOPUS:85124941503

VL - 67

SP - 81

EP - 92

JO - Crystallography Reports

JF - Crystallography Reports

SN - 1063-7745

IS - 1

ER -

ID: 98731044