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

[31] β-lactoglobulin under high pressure studied by small-angle neutron scattering
Loupiac, C
Bonetti, M
Pin, S
Calmettes, P
BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS, 2006, 1764 (02): : 211 - 216
[32] STRUCTURE OF CONCENTRATED MICROEMULSIONS STUDIED BY SMALL-ANGLE NEUTRON-SCATTERING
KOTLARCHYK, M
PHYSICA B & C, 1986, 136 (1-3): : 274 - 280
[33] Small-Angle Neutron Scattering Wave Interference on Ferromagnetic Alloys
A. V. Kovalev
Physics of the Solid State, 2018, 60 : 1966 - 1972
[34] Small-Angle Neutron Scattering Wave Interference on Ferromagnetic Alloys
Kovalev, A. V.
PHYSICS OF THE SOLID STATE, 2018, 60 (10) : 1966 - 1972
[35] THE STRUCTURE OF MAGNETIC PARTICLES STUDIED BY SMALL-ANGLE NEUTRON-SCATTERING
CEBULA, DJ
CHARLES, SW
POPPLEWELL, J
COLLOID AND POLYMER SCIENCE, 1981, 259 (03) : 395 - 397
[36] FORMATION OF ACTIN DIMERS AS STUDIED BY SMALL-ANGLE NEUTRON-SCATTERING
GODDETTE, DW
UBERBACHER, EC
BUNICK, GJ
FRIEDEN, C
JOURNAL OF BIOLOGICAL CHEMISTRY, 1986, 261 (06) : 2605 - 2609
[37] Structure and interaction in protein solutions as studied by small-angle neutron scattering
Chodankar, S
Aswal, VK
PHYSICAL REVIEW E, 2005, 72 (04):
[38] Microstructure of β-lactoglobulin/pectin coacervates studied by small-angle neutron scattering
Wang, Xiaoyong
Li, Yunqi
Wang, Yu-Wen
Lal, Jyotsana
Huang, Qingrong
JOURNAL OF PHYSICAL CHEMISTRY B, 2007, 111 (03): : 515 - 520
[39] Relaxation mechanisms in magnetic colloids studied by stroboscopic spin-polarized small-angle neutron scattering
Wiedenmann, A.
Gaehler, R.
Dewhurst, C. D.
Keiderling, U.
Prevost, S.
Kohlbrecher, J.
PHYSICAL REVIEW B, 2011, 84 (21):
[40] SPIN-WAVE RESONANCES IN CUBIC FEGE
SMITH, U
HARALDSON, S
JOURNAL OF MAGNETIC RESONANCE, 1974, 16 (03) : 390 - 401

← 1 2 3 4 5 →