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Stark anisotrope magnetische Eigenschaften von ultradünnen (La,Na) MnO 3 ‐Filmen auf LaAlO 3 (001)‐Substraten
Author(s) -
Tovstolytkin A. I.,
Matviyenko A. I.,
Tsmots V. M.,
Pankiv L. I.,
Pankiv I. S.
Publication year - 2011
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201100748
Subject(s) - magnetization , manganite , materials science , curie temperature , condensed matter physics , magnetic anisotropy , anisotropy , sputter deposition , substrate (aquarium) , magnetoresistance , thin film , nuclear magnetic resonance , sputtering , nanotechnology , ferromagnetism , optics , magnetic field , oceanography , physics , quantum mechanics , geology
Abstract Magnetic measurements and resonance measurements have been carried out on ultrathin (20 nm) films of sodium‐doped lanthanum manganite fabricated by magnetron sputtering on single crystalline LaAlO 3 (001) substrates. Complex behavior of magnetization and magnetic anisotropy has been revealed. It is shown that an out‐of‐plane alignment of the film magnetization is characteristic of the films at low temperatures. As temperature increases, a spin‐reorientation transition occurs at about 160 K and in‐plane alignment of magnetization becomes more preferable. Further increase in temperature results in an isotropic behavior of magnetization as temperature approaches and crosses the Curie point (≈270 K). It is concluded that anisotropy energy, originated from a substrate‐induced compressive strain, is responsible for the unusual behavior of the ultrathin films of sodium‐doped manganites.