Journal
JOURNAL OF APPLIED PHYSICS
Volume 108, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3524273
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- Japanese Government
- U.S. Department of Energy [BES-ER45987]
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The micromagnetic structure and magnetization process of perpendicular Y(3)Fe(5)O(12) (YIG) films were studied by Lorentz microscopy and electron holography. The closure domain structure inside the thin transmission electron microscopy specimen exhibits the same period as the magnetization pattern observed by magnetic force microscopy indicating the perpendicular anisotropy of the YIG film. Through observation of stray fields, it is concluded that the shapes of domain and domain walls are sensitive to the specimen thickness; moreover, a closure domain configuration observed in thin specimen is the stable energy state as determined by the balance between the crystalline anisotropy and shape anisotropy. Domain wall movement is observed by applying a magnetic field, in situ, inside the microscope in both horizontal and perpendicular directions; the saturation fields observed are qualitatively in agreement with the results of the hysteresis loop. (C) 2010 American Institute of Physics. [doi:10.1063/1.3524273]
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