Pure cobalt(Co)thin films were fabricated by direct current magnetron sputtering,and the effects of sputtering power and pres-sure on the microstructure and electromagnetic properties of the films were investigated.As...Pure cobalt(Co)thin films were fabricated by direct current magnetron sputtering,and the effects of sputtering power and pres-sure on the microstructure and electromagnetic properties of the films were investigated.As the sputtering power increases from 15 to 60 W,the Co thin films transition from an amorphous to a polycrystalline state,accompanied by an increase in the intercrystal pore width.Simultaneously,the resistivity decreases from 276 to 99μΩ·cm,coercivity increases from 162 to 293 Oe,and in-plane magnetic aniso-tropy disappears.As the sputtering pressure decreases from 1.6 to 0.2 Pa,grain size significantly increases,resistivity significantly de-creases,and the coercivity significantly increases(from 67 to 280 Oe),which can be attributed to the increase in defect width.Corres-pondingly,a quantitative model for the coercivity of Co thin films was formulated.The polycrystalline films sputtered under pressures of 0.2 and 0.4 Pa exhibit significant in-plane magnetic anisotropy,which is primarily attributable to increased microstress.展开更多
The BRI is not just a Chinese proposal for economic development,but also a platform for international cooperation and a global public good for realizing the right to development.LAST year marked the 10th anniversary o...The BRI is not just a Chinese proposal for economic development,but also a platform for international cooperation and a global public good for realizing the right to development.LAST year marked the 10th anniversary of the Belt and Road Initiative(BRI).Over the last decade,against the backdrop of a sluggish global economy and rising sentiment against globalization,the BRI has played an important role in advancing economic globalization,improving global governance,and boosting common prosperity.The initiative has generated more opportunities,resources,and conditions for participating countries,and facilitated the free flow of production factors,opening-up,and prosperity.展开更多
基金the financial support from the National Key Research and Development Program of China(No.2017YFB0305500)the State Key Laboratory of Powder Metallurgy,Central South University,Changsha,China.
文摘Pure cobalt(Co)thin films were fabricated by direct current magnetron sputtering,and the effects of sputtering power and pres-sure on the microstructure and electromagnetic properties of the films were investigated.As the sputtering power increases from 15 to 60 W,the Co thin films transition from an amorphous to a polycrystalline state,accompanied by an increase in the intercrystal pore width.Simultaneously,the resistivity decreases from 276 to 99μΩ·cm,coercivity increases from 162 to 293 Oe,and in-plane magnetic aniso-tropy disappears.As the sputtering pressure decreases from 1.6 to 0.2 Pa,grain size significantly increases,resistivity significantly de-creases,and the coercivity significantly increases(from 67 to 280 Oe),which can be attributed to the increase in defect width.Corres-pondingly,a quantitative model for the coercivity of Co thin films was formulated.The polycrystalline films sputtered under pressures of 0.2 and 0.4 Pa exhibit significant in-plane magnetic anisotropy,which is primarily attributable to increased microstress.
文摘The BRI is not just a Chinese proposal for economic development,but also a platform for international cooperation and a global public good for realizing the right to development.LAST year marked the 10th anniversary of the Belt and Road Initiative(BRI).Over the last decade,against the backdrop of a sluggish global economy and rising sentiment against globalization,the BRI has played an important role in advancing economic globalization,improving global governance,and boosting common prosperity.The initiative has generated more opportunities,resources,and conditions for participating countries,and facilitated the free flow of production factors,opening-up,and prosperity.
