Domain nucleation in hard/soft ferromagnetic bilayers with exchange coupling through a pinhole

E. Saitoh; T. Nakamura; H. Matsumoto; H. Miyajima

doi:10.1103/PhysRevB.68.012409

Domain nucleation in hard/soft ferromagnetic bilayers with exchange coupling through a pinhole

E. Saitoh, T. Nakamura, H. Matsumoto, H. Miyajima

Institute for Advanced Medical Research

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

Abstract

The magnetization process has been investigated for SmCo₅/SiO₂/Fe₁₉Ni₈₁ trilayer films, in which the exchange coupling between the hard-ferromagnetic SmCo₅ layer and the soft-ferromagnetic Fe₁₉Ni₈₁ layer is controlled by the dimension of a small pinhole (10–100 μm in diameter) penetrating the SiO₂ layer. The magnetization curves and magnetic torque curves indicate that the magnetization reversal in the SmCo₅ layer consists of a nucleation around the pinhole and the propagation of the domain wall. This is responsible for the suppression of the coercivity induced by the coupling through the pinhole.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	68
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.68.012409
Publication status	Published - 2003 Jan 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.68.012409

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abstract = "The magnetization process has been investigated for SmCo5/SiO2/Fe19Ni81 trilayer films, in which the exchange coupling between the hard-ferromagnetic SmCo5 layer and the soft-ferromagnetic Fe19Ni81 layer is controlled by the dimension of a small pinhole (10–100 μm in diameter) penetrating the SiO2 layer. The magnetization curves and magnetic torque curves indicate that the magnetization reversal in the SmCo5 layer consists of a nucleation around the pinhole and the propagation of the domain wall. This is responsible for the suppression of the coercivity induced by the coupling through the pinhole.",

author = "E. Saitoh and T. Nakamura and H. Matsumoto and H. Miyajima",

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N2 - The magnetization process has been investigated for SmCo5/SiO2/Fe19Ni81 trilayer films, in which the exchange coupling between the hard-ferromagnetic SmCo5 layer and the soft-ferromagnetic Fe19Ni81 layer is controlled by the dimension of a small pinhole (10–100 μm in diameter) penetrating the SiO2 layer. The magnetization curves and magnetic torque curves indicate that the magnetization reversal in the SmCo5 layer consists of a nucleation around the pinhole and the propagation of the domain wall. This is responsible for the suppression of the coercivity induced by the coupling through the pinhole.

AB - The magnetization process has been investigated for SmCo5/SiO2/Fe19Ni81 trilayer films, in which the exchange coupling between the hard-ferromagnetic SmCo5 layer and the soft-ferromagnetic Fe19Ni81 layer is controlled by the dimension of a small pinhole (10–100 μm in diameter) penetrating the SiO2 layer. The magnetization curves and magnetic torque curves indicate that the magnetization reversal in the SmCo5 layer consists of a nucleation around the pinhole and the propagation of the domain wall. This is responsible for the suppression of the coercivity induced by the coupling through the pinhole.

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Domain nucleation in hard/soft ferromagnetic bilayers with exchange coupling through a pinhole

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