Origin of perpendicular magnetic anisotropy in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Co</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi>Fe</mml:mi><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>4</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> thin films studied by x-ray magnetic circular and …
نویسندگان
چکیده
We investigate the element-specific spin and orbital states their roles in magnetic anisotropy Co-ferrite [${\mathrm{Co}}_{x}{\mathrm{Fe}}_{3\ensuremath{-}x}{\mathrm{O}}_{4+\ensuremath{\delta}}$ (001)] thin films which exhibit perpendicular (PMA). The origin of PMA low-$x$ region ($x\phantom{\rule{4pt}{0ex}}<$ 1) can be mainly explained by large moments ${\mathrm{Co}}^{2+}$ ($3{d}^{7}$) detected x-ray circular dichroism linear (XMLD). XMLD for a film ($x=0.2$) with square hysteresis curve shows oblate charge distribution site, is consistent change local nearest-neighbor distance Co extended absorption fine structure analysis. Our finding reveals that microscopic ferrite comes from enhanced along out-of-plane [001] direction through in-plane tensile strain, adds material functionalities spinel viewpoint strain moments.
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2022
ISSN: ['1098-0121', '1550-235X', '1538-4489']
DOI: https://doi.org/10.1103/physrevb.105.134416