排序方式: 共有12条查询结果,搜索用时 0 毫秒
1.
2.
3.
A new sol-foam-gel method was developed to fabricate La-doped BiFeO3 muttiferroic materials. It was demonstrated that a gradual increase in the content of La-doped into BiFeO3 results in its structure changing from rhombohedral to orthorhombic. A study of other property changes indicates that La-doping in BiFeO3 enhances its ferromagnetism and ferroelectricity. A temperature-dependent magnetization study suggests that the magnetic property of La-doped BiFeO3 samples varied from antiferromagnetic to ferromagnetic as the content of La-doped into BiFeO3 increased from 0 to 20%. Unique temperature-dependent zero field cooling (ZFC) and field cooling (FC) magnetization behaviors were observed in 15% La-doped BiFeO3 -- its ZFC temperature-dependent magnetization being ferromagnetic and its FC temperature- dependent magnetization being antiferromagnetic. A possible mechanism of such an interesting M-T behavior is discussed. 相似文献
4.
A new sol-foam-gel method was developed to fabricate La-doped BiFeO3multiferroic materials. It was demonstrated that a gradual increase in the content of La-doped into BiFeO3results in its structure changing from rhombohedral to orthorhombic. A study of other property changes indicates that La-doping in BiFeO3enhances its ferromagnetism and ferroelectricity. A temperature-dependent magnetization study suggests that the magnetic property of La-doped BiFeO3samples varied from antiferromagnetic to ferromagnetic as the content of La-doped into BiFeO3increased from 0 to 20%.Unique temperature-dependent zero field cooling(ZFC) and field cooling(FC) magnetization behaviors were observed in 15% La-doped BiFeO3— its ZFC temperature-dependent magnetization being ferromagnetic and its FC temperaturedependent magnetization being antiferromagnetic. A possible mechanism of such an interesting M–T behavior is discussed. 相似文献
5.
6.
Effect of magnetic properties of soft magnetic phase on the energy product of an exchange-spring magnet 下载免费PDF全文
Research on exchange-spring magnets has focused on the microstructures of the materials.However,research has seldom been concerned with the effect of magnetic properties of soft magnetic phase on the energy product of an exchangespring magnet.In this paper,a simple one-dimensional numerical simulation is used to investigate this effect in a Nd2Fe14Bbased exchange-spring magnet.The results reveal that the larger the anisotropy constant,the stronger the exchange coupling,and the higher the magnetization of the soft magnetic4 phase,the larger the energy product of an exchange-spring magnet.This provides evidence for choosing a soft magnetic phase in an exchange-spring magnet. 相似文献
7.
The interaction and its variation between magnetic grains
in two kinds of magnetic recording tapes are investigated by
first-order reversal curves (FORC) and the $\delta M$ method. The
composition and microstructure of the samples are characterised by
x-ray diffraction and scanning electron microscope. The FORC diagram
can provide more accurate information of the interaction and its
variation, but the $\delta M$ curves cannot. The positive
interaction field and the large variation of the interaction field
have opposite effects on the $\delta M$ curve. 相似文献
8.
硬盘磁记录介质是磁性材料应用的一个重要方面,目前在信息存储领域占有重要的地位.文章概述了磁记录硬盘介质的发展过程以及研究和开发的状况,并对硬盘未来的发展前景作了分析. 相似文献
9.
用X射线衍射仪,振动样品磁强计,扫描电镜及透射电镜对Sm2Fe15.3Zr0.2Al1.5C1.5合金的微结构和磁性进行了研究。合金主要由2/17相、α-Fe相和ZrC要组成。 相似文献
10.
硬盘磁记录介质足磁性材料应用的一个重要方面,目前在信息存储领域占有重要的地位.文章概述了磁记录硬盘介质的发展过程以及研究和开发的状况,并对硬盘未来的发展前景作了分析. 相似文献