Spin-wave dynamics in the helimagnet FeGe studied by small-angle neutron scattering

被引：19

作者：

Siegfried, S. -A. ^{[1
]}

Sukhanov, A. S. ^{[2
,3
,6
]}

Altynbaev, E. V. ^{[2
,3
]}

Honecker, D. ^{[4
]}

Heinemann, A. ^{[1
]}

Tsvyashchenko, A. V. ^{[5
]}

Grigoriev, S. V. ^{[2
,3
]}

机构：

[1] Helmholtz Zentrum Geesthacht GmbH, German Engn Mat Sci Ctr GEMS, Heinz Maier Leibnitz Zentrum MLZ, Lichtenbergstr 1, D-85747 Garching, Germany

[2] Petersburg Nucl Phys Inst, St Petersburg 188300, Russia

[3] St Petersburg State Univ, Fac Phys, Ulyanovskaya 1, St Petersburg 198504, Russia

[4] Inst Laue Langevin, F-38042 Grenoble 9, France

[5] Russian Acad Sci, Inst High Pressure Phys, Moscow 142190, Russia

[6] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2017年 / 95卷 / 13期

关键词：

ITINERANT FERROMAGNET MNSI; WEAK FERROMAGNETISM; MAGNETIC-STRUCTURES; EXCITATIONS;

D O I：

10.1103/PhysRevB.95.134415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the spin-wave stiffness of the Dzyaloshinskii-Moriya helimagnet FeGe in a temperature range from 225 K up to T-C approximate to 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 angstrom(2). The finite value of the spin-wave stiffness A = 58 meV angstrom(2) at TC classifies the order-disorder phase transition in FeGe as being the first-order one.

引用

页数：6

共 50 条

[1] Spin-wave dynamics in Mn-doped FeGe helimagnet: Small-angle neutron scattering study
Grigoriev, S. V.
Altynbaev, E. V.
Siegfried, S. -A.
Pshenichnyi, K. A.
Honnecker, D.
Heinemann, A.
Tsvyashchenko, A. V.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2018, 459 : 159 - 164
[2] 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.
PHYSICAL REVIEW B, 2019, 100 (09)
[3] Spin-wave dynamics in Invar Fe65Ni35 alloy studied by small-angle polarized neutron scattering
S.V. Grigoriev
S.V. Maleyev
V.V. Deriglazov
A.I. Okorokov
N.H. van Dijk
E. Brück
J.C.P. Klaasse
H. Eckerlebe
G. Kozik
Applied Physics A, 2002, 74 : s719 - s721
[4] Spin-wave dynamics in Invar Fe65Ni35 alloy studied by small-angle polarized neutron scattering
Grigoriev, SV
Maleyev, SV
Deriglazov, VV
Okorokov, AI
van Dijk, NH
Brück, E
Klaasse, JCP
Eckerlebe, H
Kozik, G
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2002, 74 (Suppl 1): : S719 - S721
[5] MAGNETIC-STRUCTURES OF CUBIC FEGE STUDIED BY SMALL-ANGLE NEUTRON-SCATTERING
LEBECH, B
BERNHARD, J
FRELTOFT, T
JOURNAL OF PHYSICS-CONDENSED MATTER, 1989, 1 (35) : 6105 - 6122
[6] Study of spin-wave dynamics in Fe65Ni35 ferromagnetic via small-angle polarized-neutron scattering
Grigoriev S.V.
Altynbayev E.V.
Eckerlebe H.
Okorokov A.I.
Grigoriev, S.V., 1600, Izdatel'stvo Nauka (08): : 1027 - 1034
[7] Protein Crowding Studied by Small-Angle Neutron Scattering
Goldenberg, David
Argyle, Brian
PROTEIN SCIENCE, 2012, 21 : 100 - 100
[8] AGGREGATION IN FERROFLUIDS STUDIED BY NEUTRON SMALL-ANGLE SCATTERING
CEBULA, DJ
CHARLES, SW
POPPLEWELL, J
JOURNAL DE PHYSIQUE, 1983, 44 (02): : 207 - 213
[9] Sintered materials studied by small-angle neutron scattering
Harmat, P
Bartha, L
Grosz, T
Rosta, L
PHYSICA B, 2000, 276 : 826 - 829
[10] Concepts in spin echo small-angle neutron scattering
Zhao, JK
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 2001, 34 : 639 - 645

← 1 2 3 4 5 →