Abstract
Wireless Inertial Sensors Made on Flexible Substrates and Based on Thermal Convection and Near- Field-Communication Principles
Highlights
The control of the domain structure, domain wall propagation, and magnetization reversal is at the heart of magnetism; exchange interaction, crystalline anisotropy, demagnetizing field control due to shape, exchange bias, and magnetostriction work to direct the magnetization along the respective preferred directions and maintain balance among them, resulting in the magnetic domain structure being formed to minimize the total energy of the system
The competition between the shape magnetic anisotropy and the uniaxial magnetic anisotropy induced by the heterojunction results in the formation of a specific magnetic domain structure and the modulation of magnetization switching properties.[23,24] For example, a stripe domain structure in a Ni wire whose longitudinal axis was perpendicular to the X-axis of a lithium niobate (LiNbO3) substrate was spontaneously formed in the near absence of a magnetic field, whereas a single-domain state was formed in a Ni wire aligned parallel to the X-axis direction of the LiNbO3 substrate
When the magnetic field (Hext) is applied parallel to the Ni wire aligned perpendicular to the orientation flat (OF) direction of the LiNbO3 substrate (X-axis of LiNbO3 crystal) in Fig. 4(a), the MR ratio is minimum near zero magnetic field, indicating that stripe domain structures are formed
Summary
The control of the domain structure, domain wall propagation, and magnetization reversal is at the heart of magnetism; exchange interaction, crystalline anisotropy, demagnetizing field control due to shape, exchange bias, and magnetostriction work to direct the magnetization along the respective preferred directions and maintain balance among them, resulting in the magnetic domain structure being formed to minimize the total energy of the system. The competition between the shape magnetic anisotropy and the uniaxial magnetic anisotropy induced by the heterojunction results in the formation of a specific magnetic domain structure and the modulation of magnetization switching properties.[23,24] For example, a stripe domain structure in a Ni wire whose longitudinal axis was perpendicular to the X-axis of a lithium niobate (LiNbO3) substrate was spontaneously formed in the near absence of a magnetic field, whereas a single-domain state was formed in a Ni wire aligned parallel to the X-axis direction of the LiNbO3 substrate This finding may provide a clue to developing novel artificial multiferroic materials with their functionalities above room temperature. Before the integration of artificial multiferroic materials, the magnetic properties associated with the heterojunction should be unveiled to take advantage of the development of applications such as domain wall logic and magnetic sensors
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