研究目的
Investigating the distribution of the amplitude of the magnetic potential of diffractive beams generated in a ferrite slab by a surface spin wave incident on a slit in an opaque screen.
研究成果
The study demonstrates that two diffractive beams are generated in a ferrite slab as a result of spin diffraction on a slit. The angular width of each beam depends on the slit's orientation and can vary significantly, being both greater and smaller than the value λn/D. The findings are supported by numerical calculations and are in close agreement with theoretical predictions.
研究不足
The study assumes an infinitely thin screen and does not consider the inefficiency of secondary wave sources in exciting waves localized on the opposite surface of the slab. The amplitude of the secondary waves on the opposite surface is significantly lower, which is not fully accounted for in the presented dependences.
1：Experimental Design and Method Selection:
The study uses the Huygens principle to model the diffraction of a noncollinear plane spin wave incident on a slit in an opaque screen. The magnetic potential generated in the far field of a ferrite slab is investigated.
2：Sample Selection and Data Sources:
An infinite plane-parallel ferrite slab magnetized to saturation by a tangent uniform magnetic field and surrounded by vacuum half-spaces is considered.
3：List of Experimental Equipment and Materials:
A ferrite slab with thickness s and saturation magnetization 4πM0, and an opaque screen with a slit of width D.
4：Experimental Procedures and Operational Workflow:
The total magnetic potential is calculated by integrating over the contributions from all infinitely small elements of the slit. The dependence of the potential amplitude on the polar angle in the plane of the ferrite slab is calculated for different orientations of the screen relative to an external magnetic field.
5：Data Analysis Methods:
The angular width of each diffractive beam is calculated using the law of the conservation of momentum and the isofrequency dependence of the spin wave.
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