Lorentz transmission electron microscopy on nanometric magnetic bubbles and skyrmions in bilayered manganites La1.2Sr1.8(Mn1-yRuy)2O7 with controlled magnetic anisotropy

D. Morikawa; X. Z. Yu; Y. Kaneko; Y. Tokunaga; T. Nagai; K. Kimoto; T. Arima; Y. Tokura

doi:10.1063/1.4936078

Lorentz transmission electron microscopy on nanometric magnetic bubbles and skyrmions in bilayered manganites La_1.2Sr_1.8(Mn_1-yRu_y)₂O₇ with controlled magnetic anisotropy

D. Morikawa, X. Z. Yu, Y. Kaneko, Y. Tokunaga, T. Nagai, K. Kimoto, T. Arima, Y. Tokura

IMRAM - Division of Measurements

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Abstract

We have investigated nanometric magnetic textures in thin (<150 nm) plates of Ru-doped bilayered manganites La_1.2Sr_1.8(Mn_1-yRu_y)₂O₇. Ru substitution for Mn site changes the magnetic anisotropy from in-plane to out-of-plane easy axis type without any significant change of global magnetic and crystal structures. The combination of conventional and Lorentz transmission electron microscopy observations confirms the emergence of magnetic bubbles and skyrmions in the absence of magnetic field. With the changing Ru concentration, systematic changes in the type of magnetic bubbles are observed. A tiny residual magnetic field also affects the generation and the type-change of magnetic bubbles.

Original language	English
Article number	212401
Journal	Applied Physics Letters
Volume	107
Issue number	21
DOIs	https://doi.org/10.1063/1.4936078
Publication status	Published - 2015 Nov 23

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title = "Lorentz transmission electron microscopy on nanometric magnetic bubbles and skyrmions in bilayered manganites La1.2Sr1.8(Mn1-yRuy)2O7 with controlled magnetic anisotropy",

abstract = "We have investigated nanometric magnetic textures in thin (<150 nm) plates of Ru-doped bilayered manganites La1.2Sr1.8(Mn1-yRuy)2O7. Ru substitution for Mn site changes the magnetic anisotropy from in-plane to out-of-plane easy axis type without any significant change of global magnetic and crystal structures. The combination of conventional and Lorentz transmission electron microscopy observations confirms the emergence of magnetic bubbles and skyrmions in the absence of magnetic field. With the changing Ru concentration, systematic changes in the type of magnetic bubbles are observed. A tiny residual magnetic field also affects the generation and the type-change of magnetic bubbles.",

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T1 - Lorentz transmission electron microscopy on nanometric magnetic bubbles and skyrmions in bilayered manganites La1.2Sr1.8(Mn1-yRuy)2O7 with controlled magnetic anisotropy

AU - Morikawa, D.

AU - Yu, X. Z.

AU - Kaneko, Y.

AU - Tokunaga, Y.

AU - Nagai, T.

AU - Kimoto, K.

AU - Arima, T.

AU - Tokura, Y.

PY - 2015/11/23

Y1 - 2015/11/23

N2 - We have investigated nanometric magnetic textures in thin (<150 nm) plates of Ru-doped bilayered manganites La1.2Sr1.8(Mn1-yRuy)2O7. Ru substitution for Mn site changes the magnetic anisotropy from in-plane to out-of-plane easy axis type without any significant change of global magnetic and crystal structures. The combination of conventional and Lorentz transmission electron microscopy observations confirms the emergence of magnetic bubbles and skyrmions in the absence of magnetic field. With the changing Ru concentration, systematic changes in the type of magnetic bubbles are observed. A tiny residual magnetic field also affects the generation and the type-change of magnetic bubbles.

AB - We have investigated nanometric magnetic textures in thin (<150 nm) plates of Ru-doped bilayered manganites La1.2Sr1.8(Mn1-yRuy)2O7. Ru substitution for Mn site changes the magnetic anisotropy from in-plane to out-of-plane easy axis type without any significant change of global magnetic and crystal structures. The combination of conventional and Lorentz transmission electron microscopy observations confirms the emergence of magnetic bubbles and skyrmions in the absence of magnetic field. With the changing Ru concentration, systematic changes in the type of magnetic bubbles are observed. A tiny residual magnetic field also affects the generation and the type-change of magnetic bubbles.

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Lorentz transmission electron microscopy on nanometric magnetic bubbles and skyrmions in bilayered manganites La_1.2Sr_1.8(Mn_1-yRu_y)₂O₇ with controlled magnetic anisotropy

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