کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1798419 | 1524821 | 2016 | 4 صفحه PDF | دانلود رایگان |
• Nonlinear strain dependence of magnetic anisotropy.
• The FeCo film undergoes a spin reorientation at a critical strain between 2 and 4%.
• The underlying mechanism is the strain-induced shift of the spin–orbit coupled d-states of the Fe atoms.
• Giant magnetostriction coefficient of about 420×10-6 in the heterostructure.
Employing ab initio electronic structure calculations we have investigated the magnetostrictive properties and the effect of epitaxial strain on the magnetic anisotropy (MA) of Au/FeCo/MgO heterostructure. Under small expansive strain on the FeCo layer the system exhibits an in-plane MA. The calculations reveal that the strain dependence of the MA is nonlinear and that the FeCo film undergoes a spin reorientation at a critical strain between 2 and 4%. The underlying mechanism is the strain-induced shift of the spin–orbit coupled d-states of the Fe atoms. We predict a giant magnetostriction coefficient of about 420×10−6 in the heterostructure.
Journal: Journal of Magnetism and Magnetic Materials - Volume 400, 15 February 2016, Pages 262–265