Heisenberg Exchange and Dzyaloshinskii-Moriya Interaction in Ultrathin Pt(W)/CoFeB Single and Multilayers

被引：13

作者：

Boettcher, Tobias ^{[1
,2
]}

Lee, Kyujoon ^{[3
]}

Heussner, Frank ^{[1
]}

Jaiswal, Samridh ^{[3
,4
]}

Jakob, Gerhard ^{[2
,3
]}

Klaeui, Mathias ^{[2
,3
]}

Hillebrands, Burkard ^{[1
]}

Braecher, Thomas ^{[1
]}

Pirro, Philipp ^{[1
]}

机构：

[1] Tech Univ Kaiserslautern, Fachbereich Phys & Landesforsch Zentrum OPTIMAS, D-67663 Kaiserslautern, Germany

[2] MAINZ Grad Sch Excellence, D-55128 Mainz, Germany

[3] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[4] Singulus Technol AG, D-63796 Kahl, Germany

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2021年 / 57卷 / 07期

关键词：

Brillouin light-scattering (BLS); Dzyaloshinskii-Moriya interaction (DMI); Heisenberg exchange; magnetic films; spin waves; FERROMAGNETIC-FILMS; SPIN; MAGNITUDE; SKYRMIONS; DYNAMICS;

D O I：

10.1109/TMAG.2021.3079259

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present results of the analysis of Brillouin light-scattering (BLS) measurements of spin waves performed on ultrathin single and multirepeat CoFeB layers with adjacent heavy metal layers. From a detailed study of the spin-wave dispersion relation, we independently extract the Heisenberg exchange interaction (also referred to as symmetric exchange interaction), the Dzyaloshinskii-Moriya interaction (DMI, also referred to as antisymmetric exchange interaction), and the anisotropy field. We find a large DMI in CoFeB thin films adjacent to a Pt layer and nearly vanishing DMI for CoFeB films adjacent to a W layer. Furthermore, the influence of the dipolar interaction on the dispersion relation and on the evaluation of the Heisenberg exchange parameter is demonstrated. Eventually, an experimental analysis of the impact of the DMI on the spin-wave lifetime is presented.

引用

页数：7

共 51 条

[1] Simultaneous control of the Dzyaloshinskii-Moriya interaction and magnetic anisotropy in nanomagnetic trilayers [J].

Balk, A. L. ;

Kim, K-W. ;

Pierce, D. T. ;

Stiles, M. D. ;

Unguris, J. ;

Stavis, S. M. .

PHYSICAL REVIEW LETTERS, 2017, 119 (07)

[2] Interfacial Dzyaloshinskii-Moriya interaction in perpendicularly magnetized Pt/Co/AlOx ultrathin films measured by Brillouin light spectroscopy [J].

Belmeguenai, Mohamed ;

Adam, Jean-Paul ;

Roussigne, Yves ;

Eimer, Sylvain ;

Devolder, Thibaut ;

Kim, Joo-Von ;

Cherif, Salim Mourad ;

Stashkevich, Andrey ;

Thiaville, Andre .

PHYSICAL REVIEW B, 2015, 91 (18)

[3] Unraveling the role of dipolar versus Dzyaloshinskii-Moriya interactions in stabilizing compact magnetic skyrmions [J].

Bernand-Mantel, Anne ;

Muratov, Cyrill B. ;

Simon, Thilo M. .

PHYSICAL REVIEW B, 2020, 101 (04)

[4] Creation of unidirectional spin-wave emitters by utilizing interfacial Dzyaloshinskii-Moriya interaction [J].

Bracher, T. ;

Boulle, O. ;

Gaudin, G. ;

Pirro, P. .

PHYSICAL REVIEW B, 2017, 95 (06)

[5] Time- and power-dependent operation of a parametric spin-wave amplifier [J].

Braecher, T. ;

Heussner, F. ;

Pirro, P. ;

Fischer, T. ;

Geilen, M. ;

Heinz, B. ;

Laegel, B. ;

Serga, A. A. ;

Hillebrands, B. .

APPLIED PHYSICS LETTERS, 2014, 105 (23)

[6] Direct Observation of Interfacial Dzyaloshinskii-Moriya Interaction from Asymmetric Spin-wave Propagation in W/CoFeB/SiO2 Heterostructures Down to Sub-nanometer CoFeB Thickness [J].

Chaurasiya, Avinash Kumar ;

Banerjee, Chandrima ;

Pan, Santanu ;

Sahoo, Sourav ;

Choudhury, Samiran ;

Sinha, Jaivardhan ;

Barman, Anjan .

SCIENTIFIC REPORTS, 2016, 6

[7] Magnon transistor for all-magnon data processing [J].

Chumak, Andrii V. ;

Serga, Alexander A. ;

Hillebrands, Burkard .

NATURE COMMUNICATIONS, 2014, 5

[8] Study of fully epitaxial Fe/Pt bilayers for spin pumping by ferromagnetic resonance spectroscopy [J].

Conca, A. ;

Keller, S. ;

Mihalceanu, L. ;

Kehagias, T. ;

Dimitrakopulos, G. P. ;

Hillebrands, B. ;

Papaioannou, E. Th. .

PHYSICAL REVIEW B, 2016, 93 (13)

[9] Annealing influence on the Gilbert damping parameter and the exchange constant of CoFeB thin films [J].

Conca, A. ;

Papaioannou, E. Th. ;

Klingler, S. ;

Greser, J. ;

Sebastian, T. ;

Leven, B. ;

Loesch, J. ;

Hillebrands, B. .

APPLIED PHYSICS LETTERS, 2014, 104 (18)

[10] Enhanced spin-orbit torques by oxygen incorporation in tungsten films [J].

Demasius, Kai-Uwe ;

Phung, Timothy ;

Zhang, Weifeng ;

Hughes, Brian P. ;

Yang, See-Hun ;

Kellock, Andrew ;

Han, Wei ;

Pushp, Aakash ;

Parkin, Stuart S. P. .

NATURE COMMUNICATIONS, 2016, 7

← 1 2 3 4 5 6 →