Studies on the magnetic viscosity and the magnetic anisotropy of gamma-fe2o3 powders | |
Hou, DL; Nie, XF; Luo, HL | |
刊名 | Applied physics a-materials science & processing
![]() |
1998 | |
卷号 | 66期号:1页码:109-114 |
ISSN号 | 0947-8396 |
通讯作者 | Hou, dl() |
英文摘要 | Granular gamma-fe2o3 powders, acicular gamma-fe2o3, and cofe-gamma-fe2o3 powders are prepared by different methods. particle shapes and mean particle sizes of samples are determined by transmission electron microscopy (tem). magnetic parameters are measured by a vibrating sample magnetometer (vsm) at different temperatures. effective magnetic anisotropy constants k-e of granular gamma-fe2o3 powders at different temperatures are obtained by using the law of approach to saturation (lats). k-e values of acicular gamma-fe2o3 and cofe-gamma-fe2o3 powders are measured by a magnetotorquemeter. it is found for the first time that the variation tendency of k-e with temperature for granular gamma-fe2o3 is about the same as that of shape magnetic anisotropy k-sh. fluctuation field h-f and activation volume v-f of samples are measured. a theoretical expression of v-f is derived. for granular gamma-fe2o3 powders, calculated activation volumes are consistent with experimental ones at different temperatures. but as for acicular gamma-fe2o3 powders, calculated activation volumes are larger than experimental ones. experimental results show that magnetization reversal of granular gamma-fe2o3 at different temperatures is close to homogeneous rotation. |
WOS关键词 | PARTICLES ; COERCIVITY ; IRON |
WOS研究方向 | Materials Science ; Physics |
WOS类目 | Materials Science, Multidisciplinary ; Physics, Applied |
语种 | 英语 |
出版者 | SPRINGER VERLAG |
WOS记录号 | WOS:000072420100017 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2373821 |
专题 | 物理研究所 |
通讯作者 | Hou, DL |
作者单位 | 1.Hebei Normal Univ, Dept Phys, Shijiazhuang 050016, Peoples R China 2.Acad Sinica, Inst Phys, Beijing 100080, Peoples R China |
推荐引用方式 GB/T 7714 | Hou, DL,Nie, XF,Luo, HL. Studies on the magnetic viscosity and the magnetic anisotropy of gamma-fe2o3 powders[J]. Applied physics a-materials science & processing,1998,66(1):109-114. |
APA | Hou, DL,Nie, XF,&Luo, HL.(1998).Studies on the magnetic viscosity and the magnetic anisotropy of gamma-fe2o3 powders.Applied physics a-materials science & processing,66(1),109-114. |
MLA | Hou, DL,et al."Studies on the magnetic viscosity and the magnetic anisotropy of gamma-fe2o3 powders".Applied physics a-materials science & processing 66.1(1998):109-114. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论