Magnon dispersion shift in the induced ferromagnetic phase of noncentrosymmetric MnSi

Taku J. Sato; Daisuke Okuyama; Tao Hong; Akiko Kikkawa; Yasujiro Taguchi; Taka Hisa Arima; Yoshinori Tokura

doi:10.1103/PhysRevB.94.144420

Magnon dispersion shift in the induced ferromagnetic phase of noncentrosymmetric MnSi

Taku J. Sato, Daisuke Okuyama, Tao Hong, Akiko Kikkawa, Yasujiro Taguchi, Taka Hisa Arima, Yoshinori Tokura

Triple-Axis

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

42 Scopus citations

Abstract

A small angle neutron inelastic scattering measurement has been performed to study the magnon dispersion relation in the field-induced ferromagnetic phase of the noncentrosymmetric binary compound MnSi. For the magnons propagating parallel or antiparallel to the external magnetic field, we experimentally confirmed that the dispersion relation is asymmetrically shifted along the magnetic field direction. This magnon dispersion shift is attributed to the relativistic Dzyaloshinskii-Moriya interaction, which is finite in noncentrosymmetric magnets, such as MnSi. The shift direction is found to be switchable by reversing the external magnetic field direction.

Original language	English
Article number	144420
Journal	Physical Review B
Volume	94
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.94.144420
State	Published - Oct 19 2016

Access to Document

10.1103/PhysRevB.94.144420

Cite this

@article{0ddc2f985d7945bcacda3a07ac316495,

title = "Magnon dispersion shift in the induced ferromagnetic phase of noncentrosymmetric MnSi",

abstract = "A small angle neutron inelastic scattering measurement has been performed to study the magnon dispersion relation in the field-induced ferromagnetic phase of the noncentrosymmetric binary compound MnSi. For the magnons propagating parallel or antiparallel to the external magnetic field, we experimentally confirmed that the dispersion relation is asymmetrically shifted along the magnetic field direction. This magnon dispersion shift is attributed to the relativistic Dzyaloshinskii-Moriya interaction, which is finite in noncentrosymmetric magnets, such as MnSi. The shift direction is found to be switchable by reversing the external magnetic field direction.",

author = "Sato, {Taku J.} and Daisuke Okuyama and Tao Hong and Akiko Kikkawa and Yasujiro Taguchi and Arima, {Taka Hisa} and Yoshinori Tokura",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = oct,

day = "19",

doi = "10.1103/PhysRevB.94.144420",

language = "English",

volume = "94",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "14",

}

TY - JOUR

T1 - Magnon dispersion shift in the induced ferromagnetic phase of noncentrosymmetric MnSi

AU - Sato, Taku J.

AU - Okuyama, Daisuke

AU - Hong, Tao

AU - Kikkawa, Akiko

AU - Taguchi, Yasujiro

AU - Arima, Taka Hisa

AU - Tokura, Yoshinori

PY - 2016/10/19

Y1 - 2016/10/19

N2 - A small angle neutron inelastic scattering measurement has been performed to study the magnon dispersion relation in the field-induced ferromagnetic phase of the noncentrosymmetric binary compound MnSi. For the magnons propagating parallel or antiparallel to the external magnetic field, we experimentally confirmed that the dispersion relation is asymmetrically shifted along the magnetic field direction. This magnon dispersion shift is attributed to the relativistic Dzyaloshinskii-Moriya interaction, which is finite in noncentrosymmetric magnets, such as MnSi. The shift direction is found to be switchable by reversing the external magnetic field direction.

AB - A small angle neutron inelastic scattering measurement has been performed to study the magnon dispersion relation in the field-induced ferromagnetic phase of the noncentrosymmetric binary compound MnSi. For the magnons propagating parallel or antiparallel to the external magnetic field, we experimentally confirmed that the dispersion relation is asymmetrically shifted along the magnetic field direction. This magnon dispersion shift is attributed to the relativistic Dzyaloshinskii-Moriya interaction, which is finite in noncentrosymmetric magnets, such as MnSi. The shift direction is found to be switchable by reversing the external magnetic field direction.

UR - http://www.scopus.com/inward/record.url?scp=84992051560&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.94.144420

DO - 10.1103/PhysRevB.94.144420

M3 - Article

AN - SCOPUS:84992051560

SN - 2469-9950

VL - 94

JO - Physical Review B

JF - Physical Review B

IS - 14

M1 - 144420

ER -

Magnon dispersion shift in the induced ferromagnetic phase of noncentrosymmetric MnSi

Abstract

Access to Document

Other files and links

Fingerprint

Cite this