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that the SmCo film possessed good magnetic anisotropy, a high coercivity of 3019 kA/m and low magnetic exchange coupling. Microstructure analysis showed that crystallized SmCo_5 magnetic phase, non-magnetic SmCo_2 phase and Sm_2Co_7 phase co-existed ill the film. The non-magnetic SmCo2 phase might function as isolator of SmCo grains, leading to a decrease of magnetic exchange coupling. Moreover, a Cr_2O_3......
SmCo磁记录薄膜中磁耦合作用的研究 李帅1,孙文星2,李宝河1,李宁1,冯春1,于广华1 (1.北京科技大学材料物理与化学系,北京,100083;2.山东师范大学管理与经济学院,山东,济南,250014) 摘要:采用磁控溅射方法,在玻璃基片上制备了Cr/SmCo/Cr结构的SmCo薄膜,实验结果表明:在低Sm含量(20.5%(原子分数))和高Sm含量(大于30.7%)的SmCo薄膜中都能形成SmCO_5磁性相,在Sm含量较高的SmCo薄膜中同时还形成了SmCo_2等非磁性相,非磁性相的存在对磁性相有隔离作用,从而降低了磁性晶粒之间的磁耦合作用.因此可以用提高Sm含量的方法来降低SmCo薄膜磁性晶粒之间的磁耦合作用. 关键词:SmCo薄膜; 磁记录; 交换耦合; 稀土; SmCo thin film; magnetic recording; magnetic exchange......
="ChDivSummary">Cr/SmCo/Cr thin films with Sm concentration of 37.7 at.% were deposited on glass substrates by magnetron sputtering. Measurement of magnetic properties showed that the SmCo film possessed good... co-existed in the film. The non-magnetic SmCo2 phase might function as isolator of SmCo grains, leading to a decrease of magnetic exchange coupling. Moreover, a Cr2O3 oxide layer which could protect......
law with the exponents, A=A0+H0αωβ; (2) the x composition of SmxCo5 film has evident effect on the scaling behavior and magnetic properties; (3) the anisotropy scaling exponents exist clearly in the anisotropy SmxCo5 thin films. Moreover, the scaling behavior of the anisotropy magnetic film was also simulated with Monte Carlo method. The simulated results are consistent with the experimental fact......
2∶17型SmCo永磁材料的研究进展与展望杜娟,易健宏,彭元东,李丽娅,罗述东,唐新文摘 要:2:17型SmCo永磁体自1977年问世以来,其研究得到很大发展,性能不断提高.因其具有优异的磁性能,已在微波通讯技术,航空航天,国防工业,交通运输业等领域广泛应用.因2:17型SmCo永磁体具有较高的居里温度和较高的磁能积,而成为永磁材料的首选材料.作者介绍了2:17型SmCo永磁的发展过程,磁体的磁性能,制备工艺,应用情况及其发展趋势.关键词:2型SmCo永磁材料;高温磁体;发展;展望;......
Effect of film thickness on magnetic properties of Cr/SmCo/Cr films李宁1,李宝河2,冯春1,李明华1,于广华11. Department of Materials Physics and Chemistry,University of Science and Technology Beijing2. Department... sputtering,followed by an annealing process at 550 °C for 20 min.Experimental results showed that the SmCo film of 30 nm exhibited two-phase behavior in the demagnetization process,the obvious kink......
Effect of film thickness on magnetic properties of Cr/SmCo/Cr films李宁1,李宝河2,冯春1,李明华1,于广华11. Department of Materials Physics and Chemistry,University of Science and Technology Beijing2. Department... sputtering,followed by an annealing process at 550 °C for 20 min.Experimental results showed that the SmCo film of 30 nm exhibited two-phase behavior in the demagnetization process,the obvious kink......
不同基体SmCo颗粒膜的组织和磁性 祝要民1,宋晓平1 (1.西安交通大学;2.河南科技大学) 摘要:用磁控溅射方法制备了Cu,Mo和Al基体的SmCo颗粒薄膜.用能谱EDAX,透射电镜TEM和振动样品磁强计VSM分别表征和测量了薄膜的结构和磁性能.结果表明,Cu基体溅射态已晶化而Mo和Al溅射态为非晶态,在500℃回火30 min后磁性相的析出特性有一定差异.对溅射的SmCo薄膜在500℃回火30 min后,Cu基体的SmCo薄膜磁性能较好,并有一定的磁各向异性,其原因是Cu在SmCo晶界的聚集对晶粒有钉扎作用. 关键词:金属材料; SmCo颗粒薄膜; 磁性能; [全文内容正在添加中] ......
微机电系统用TbCu7型SmCo基薄膜的合成(英文)彭龙,李乐中,陈松,李元勋成都信息工程学院摘 要:微机电系统(MEMS)的发展要求Si基片上的永磁薄膜具有良好的热稳定性.采用磁控溅射工艺在单晶Si(100)基片上沉积了SmCo基永磁薄膜,研究了溅射参数对薄膜沉积速率,微观结构,晶体结构和磁性能的影响.结果表明:通过调整溅射参数可以获得TbCu7型结构的SmCo基永磁薄膜.该薄膜具有良好的晶粒取向和微观结构,因而获得了较好的面内磁性能,其反磁化过程主要受控于畴壁钉扎机制.关键词:SmCo合金;永磁薄膜;溅射;MEMS;......
