一、前言
耗散结构论(Thory of the DissipativeStructure)是比利时的布鲁塞尔自由大学的教授普利高津(I.Prigogine)从热力学不可逆现象中总结来的一个科学理论.由于热力学是一个普适性的科学,而耗散结构论则抓住了不同事物的各种系统...一、前言
耗散结构论(Thory of the DissipativeStructure)是比利时的布鲁塞尔自由大学的教授普利高津(I.Prigogine)从热力学不可逆现象中总结来的一个科学理论.由于热力学是一个普适性的科学,而耗散结构论则抓住了不同事物的各种系统中都存在着对能量"耗散"的共性,因此可以用共同的数学模型来研究不同学科上所存在的问题,在研究上具有方法论的意义.普利高津也由此而荣获了1977年的诺贝尔奖.展开更多
Co87Nb10Zr3,Co76Nb19Zr5,Co64Nb26Zr10 and Co64Nb16Zr20 amorphous films were deposited on noncrystalline glass substrates by DC unbalanced magnetron sputtering. The compositions of amorphous films were tailored in the l...Co87Nb10Zr3,Co76Nb19Zr5,Co64Nb26Zr10 and Co64Nb16Zr20 amorphous films were deposited on noncrystalline glass substrates by DC unbalanced magnetron sputtering. The compositions of amorphous films were tailored in the light of the individual deposition rate of Co,Nb and Zr. The amorphous films with the anticipated composition were prepared by means of co-sputtering Co,Nb and Zr targets simultaneously. It is indicated that there is interaction among three targets during co-sputtering. The morphology and composition of the films were observed by SEM,AFM and EDS. The structure and magnetic property were measured by XRD and physical property measurement system(PPMS) . The coercivity changes with the composition,varying from 240 to 1 600 A/m. After vacuum isothermal annealing at temperatures of 475,500,525 and 550 ℃ for 15 and 30 min,respectively,it is found that high Nb content is beneficial to improving thermal stability of amorphous films. The crystallized films have the mean grain size of 2-19 nm.展开更多
文摘一、前言
耗散结构论(Thory of the DissipativeStructure)是比利时的布鲁塞尔自由大学的教授普利高津(I.Prigogine)从热力学不可逆现象中总结来的一个科学理论.由于热力学是一个普适性的科学,而耗散结构论则抓住了不同事物的各种系统中都存在着对能量"耗散"的共性,因此可以用共同的数学模型来研究不同学科上所存在的问题,在研究上具有方法论的意义.普利高津也由此而荣获了1977年的诺贝尔奖.
基金Project(2007CB607602) supported by the National Basic Research Program of China
文摘Co87Nb10Zr3,Co76Nb19Zr5,Co64Nb26Zr10 and Co64Nb16Zr20 amorphous films were deposited on noncrystalline glass substrates by DC unbalanced magnetron sputtering. The compositions of amorphous films were tailored in the light of the individual deposition rate of Co,Nb and Zr. The amorphous films with the anticipated composition were prepared by means of co-sputtering Co,Nb and Zr targets simultaneously. It is indicated that there is interaction among three targets during co-sputtering. The morphology and composition of the films were observed by SEM,AFM and EDS. The structure and magnetic property were measured by XRD and physical property measurement system(PPMS) . The coercivity changes with the composition,varying from 240 to 1 600 A/m. After vacuum isothermal annealing at temperatures of 475,500,525 and 550 ℃ for 15 and 30 min,respectively,it is found that high Nb content is beneficial to improving thermal stability of amorphous films. The crystallized films have the mean grain size of 2-19 nm.
