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• W4200430894 startingPage "168841" @default.
• W4200430894 abstract "Co-rich Co 1 − x Mn x alloys have hcp or fcc disordered phase and those ferromagnetic orderings are significantly deteriorated with increasing Mn concentration x in bulk. On the other hand, those metastable bcc phases show properties attractive to magnetics and spintronics , as studied recently. Here, we report systematic study of structure and magnetism for epitaxial thin films. The single phase bcc Co 1 − x Mn x (001) films were pseudomorphically grown on Cr(001) for 0 . 14 < x < 0 . 50 with a sputtering technique. The saturation magnetization was larger than that of pure Co for the films with x = 0.14 and 0.25 and smaller for the x = 0.34 films, disappearing completely for the x = 0.5 films. X-ray magnetic circular dichroism unveiled that this behavior stemmed from the composition dependence of elemental magnetic moments. Slight enhancement of magnetic moment of Co was observed in bcc alloy films. We also found that magnetic moments of Mn exceeded 2 μ B at the maximum and were not as high as theoretical values, approximately 3 μ B , obtained from ab-initio calculation with coherent potential approximation. This difference is qualitatively understood in terms of microscopic Mn atom pairing with antiferromagnetic coupling, being suggested from the ab-initio band structure calculations based on special quasi-random structure of bcc Co 1 − x Mn x . • Metastable bcc CoMn alloy shows properties attractive to magnetics and spintronics. • bcc Co 1 − x Mn x (001) films were grown on Cr(001) for 0.14 < x < 0.50 with sputtering. • The saturation magnetization was larger than that of pure Co for the films with x = 0 . 14 and 0.25. • Magnetic moments of Mn exceeded 2 μ B at the maximum. • Ab-initio calculations suggested Mn atom pairing with antiferromagnetic coupling." @default.
• W4200430894 created "2021-12-31" @default.
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• W4200430894 date "2022-04-01" @default.
• W4200430894 modified "2023-10-16" @default.
• W4200430894 title "Structure and magnetism in metastable bcc Co<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=d1e604 altimg=si65.svg><mml:msub><mml:mrow /><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>Mn<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=d1e616 altimg=si66.svg><mml:msub><mml:mrow /><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math> epitaxial films" @default.
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• W4200430894 doi "https://doi.org/10.1016/j.jmmm.2021.168841" @default.
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