摘要
利用表面磁光克尔效应和铁磁共振对分子束外延生长的Fe/Fe50 Mn50 双层膜的交换偏置场和矫顽力进行了研究 ,实验结果表明 ,当反铁磁层厚度小于 5 5nm时 ,不出现交换偏置 ,而当大于这一厚度时 ,出现交换偏置 ;大约在7nm时 ,达到极大值 .随着反铁磁层厚度的继续增大 ,偏置场和矫顽力随Fe50 Mn50 膜厚的增大而下降 .铁磁共振实验结果表明样品的磁性存在单向各向异性 .并对上述结果进行了讨论 .
Exchange biasing and coercive field of molecular\|beam\|epitaxy\|grown Fe/Fe\-\{50\}Mn\-\{50\} bilayers have been investigated by Surface Magneto\|optical Kerr Effect(SMOKE) and ferromagnetic resonance measurements. The results indicate that there is no exchange biasing when the thickness of antiferromagnetic layer is less than 5 5?nm. The exchange biasing appears when the thickness of antiferromagnetic layer is greater than 5 5?nm,and the maximum value is reached when the thickness is about 7?nm. Exchange biasing and coercive field decrease with further increase of the thickness of the antiferr\|magnetic layer. The ferromagnetic resonance measurement results show that there exists unidirectional anisotropy. The above results are discussed in the paper.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第10期2022-2026,共5页
Acta Physica Sinica
基金
国家自然科学基金!(批准号 :1962 5 410
1973 4 0 0 2 )
上海市自然科学基金资助的课题&&
关键词
分子束外延
双层膜
交换偏置
MBE, Fe/Fe 50 Mn 50 , Bilayer, Exchange biasing
