Peculiarities of magneto-infrared reflectivity of nanostructured manganite filmsстатья
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Дата последнего поиска статьи во внешних источниках: 4 мая 2020 г.
Аннотация:The electrical resistance and reflectance of unpolarized infrared radiation have been
studied in the La2/3Ba1/3MnO3 films with and without a variant structure. Applying of an external
magnetic field leads to appearance of magnetoreflection and colossal magnetoresistance effects
with maxima near the Curie temperature of the films. The high-angle boundaries markedly
enhance the electric and magnetooptical properties of nanostructured epitaxial films with the
variant structure. For example, an additional low-temperature contribution to the
magnetoreflection has been revealed in La2/3Ba1/3MnO3/ZrO2(Y2O3) films. This peculiarity is
associated with the change of the high-frequency conductivity of the films with the variant
structure due to the processes of tunnelling of spin-polarized electrons across the boundaries of
structural domains far below the Curie temperature of the sample. The detection of “tunnel
magnetoreflection” in the doped lanthanum manganite films could promote extension of the
scope of their application in the modern optoelectronics.