Formation of nanoscale magnetic bubbles in ferromagnetic insulating manganite La 7/8Sr 1/8MnO 3

T. Nagai; M. Nagao; K. Kurashima; T. Asaka; W. Zhang; K. Kimoto

doi:10.1063/1.4760266

Formation of nanoscale magnetic bubbles in ferromagnetic insulating manganite La _7/8Sr _1/8MnO ₃

T. Nagai, M. Nagao, K. Kurashima, T. Asaka, W. Zhang, K. Kimoto

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

15 Citations (Scopus)

Abstract

We have observed the response of spin arrangements to external magnetic fields in a multiorbital Mott insulator, ferromagnetic insulating manganite La _7/8Sr _1/8MnO ₃, by low-temperature in situ Lorentz microscopy. Magnetic fields normal to the plane of the thin-plate sample continuously change the width of domains in the serpentine-like domain structure, eventually giving rise to nanoscale elliptical magnetic bubbles of ∼200 nm major diameter at 3.6 kOe. The formation of these bubbles implies large magnetic anisotropy related to the orbital ordering and suggests the possibility of manipulating the bubbles using an electric field.

Original language	English
Article number	162401
Journal	Applied Physics Letters
Volume	101
Issue number	16
DOIs	https://doi.org/10.1063/1.4760266
Publication status	Published - 2012 Oct 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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AU - Nagai, T.

AU - Nagao, M.

AU - Kurashima, K.

AU - Asaka, T.

AU - Zhang, W.

AU - Kimoto, K.

PY - 2012/10/15

Y1 - 2012/10/15

N2 - We have observed the response of spin arrangements to external magnetic fields in a multiorbital Mott insulator, ferromagnetic insulating manganite La 7/8Sr 1/8MnO 3, by low-temperature in situ Lorentz microscopy. Magnetic fields normal to the plane of the thin-plate sample continuously change the width of domains in the serpentine-like domain structure, eventually giving rise to nanoscale elliptical magnetic bubbles of ∼200 nm major diameter at 3.6 kOe. The formation of these bubbles implies large magnetic anisotropy related to the orbital ordering and suggests the possibility of manipulating the bubbles using an electric field.

AB - We have observed the response of spin arrangements to external magnetic fields in a multiorbital Mott insulator, ferromagnetic insulating manganite La 7/8Sr 1/8MnO 3, by low-temperature in situ Lorentz microscopy. Magnetic fields normal to the plane of the thin-plate sample continuously change the width of domains in the serpentine-like domain structure, eventually giving rise to nanoscale elliptical magnetic bubbles of ∼200 nm major diameter at 3.6 kOe. The formation of these bubbles implies large magnetic anisotropy related to the orbital ordering and suggests the possibility of manipulating the bubbles using an electric field.

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Formation of nanoscale magnetic bubbles in ferromagnetic insulating manganite La _7/8Sr _1/8MnO ₃

Abstract

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