The purpose of the work is to find the dependence of growth rate of magnetization centers of various types on their surrounding by other nucleation centers in a synthetic Pt/Co/Ir/Co/Pt ferrimagnet with perpendicular magnetic anisotropy. The following four types of nucleation centers exist in a sample with two ferromagnetic layers of different thicknesses: P+ centers correspond to the regions where the magnetizations of the thick and thin Co layers are directed along an applied field (↑↑); P– centers are the regions where the magnetizations of the layers are opposite to an applied field (↓↓); and AP+ and AP– centers correspond to the regions where the magnetizations of the thick and thin Co layers are opposite to each other and the total magnetic moment is along (↑↓) or opposite to (↓↑) an applied field, respectively. P– nucleation centers are found to be surrounded by AP+ regions in any field and exhibit a monotonic field dependence of their boundary. The field dependence of the growth rate of AP– nucleation centers is nonmonotonic since, as the field increases, they are surrounded by AP+ nucleation centers, AP+ and P– regions, and only P– nucleation centers in strong fields.
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C. Jiang, S. Mei Ng, C. W. Leunget, et al., J. Mater. Chem. C 5, 252 (2017).
G. Li, S. Sun, R. J. Wilson, et al., Sens. Actuators, A 126, 98 (2006).
K. Shahbazi, J.-V. Kim, H. T. Nembach, et al., Phys. Rev. B 99, 094409 (2019).
T. Fache, H. S. Tarazona, J. Liu, et al., Phys. Rev. B 98, 064410 (2018).
A. Talantsev, Y. Lu, T. Fache, et al., J. Phys.: Condens. Matter 30, 135804 (2018).
E. Fatuzzo, Phys. Rev. 127, 1999 (1962).
M. Labrune, S. Andrieu, F. Rio, et al. J. Magn. Magn. Mater. 80, 211 (1989).
A. A. Adjanoh, R. Belhi, J. Vogel, et al., J. Magn. Magn. Mater. 323, 504 (2011).
E. Lundgren, B. Stanka, M. Schmid, et al., Phys. Rev. B 62, 2843 (2000).
R. B. Morgunov and G. L. L’vova, JETP Lett. 108, 137 (2018).
N. Nakajima, T. Koide, T. Shirada, et al., Phys. Rev. Lett. 81, 5229 (1998).
R. B. Morgunov, E. I. Kunitsyna, A. D. Talantsev, et al., Appl. Phys. Lett. 114, 222402 (2019).
A. Lyberatos and J. Ferre, J. Phys. D: Appl. Phys. 33, 1060 (2000).
P. J. Metaxas, J. P. Jamet, A. Mougin, et al., Phys. Rev. Lett. 99, 217208 (2007).
A. Lyberatos and R. W. Chantrell, J. Phys.: Condens. Matter 9, 2623 (1997).
A. Kirilyuk, J. Ferre, V. Grolier, et al., J. Magn. Magn. Mater. 151, 45 (1997).
We thank Y. Lu and A. Hamadeh for supplying the samples and useful discussions.
This work was supported by grant 3.1992.2017/4.6 in terms of the competition of scientific projects performed by scientific teams of research centers and/or laboratories in institutes of higher education, as well as under the project no. 5-100 “Elevating Competitiveness of Leading Russian Universities among Global Research and Education Centers.” The work of A.I.B. was supported by the Russian Foundation for Basic Research (project no. 19-32-90128, postgraduates).
Translated by K. Shakhlevich
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Bezverkhnii, A.I., Talantsev, A.D., Mangin, S. et al. Interaction of Magnetization Centers of Different Signs as the Cause of the Nonmonotonic Field Dependence of the Domain Wall Velocity in Synthetic Pt/Co/Ir/Co/Pt Ferrimagnets. J. Exp. Theor. Phys. 129, 998–1004 (2019). https://doi.org/10.1134/S1063776119120021