物理学报Issue(9)：415-420,6.DOI:10.7498/aps.62.097501
BiFeO3/Ni81Fe19磁性双层膜中的交换偏置及其热稳定性研究*
Exchange bias in BiFeO3/Ni81Fe19 magnetic films and its thermal stability∗
摘要
Abstract
This paper deals with the exchange bias and its thermal stability in magnetic BiFeO3/Ni81Fe19 bilayer sputtered under an electro-magnetic field. The results show that the BiFeO3/Ni18Fe19 bilayer presents an in-plane uniaxial magnetic anisotropy and a significant exchange bias effect, however the exchange bias field Hex in the BiFeO3/Ni18Fe19 bilayer does not show a visible training effect. The forward and recoil loop shifts towards positive fields, while holding the film in a negative saturation field. Hex decreases monotonously with the increase in the holding time (tsat), whereas Hc is almost the same. With increasing temperature Tm, Hex will not alter signif-icantly, which means that Hex is not sensitive to the temperature, showing a good thermal stability. However, Hc may reduce rapidly with the increase in temperature. We believe that the good thermal stability may result from the coupling between ferroelectric and antiferromagnetic moments in BiFeO3.关键词
多铁性/磁性薄膜/交换偏置/热稳定性Key words
multiferroic/magnetic films/exchange bias/thermal stability引用本文复制引用
周广宏,潘旋,朱雨富..BiFeO3/Ni81Fe19磁性双层膜中的交换偏置及其热稳定性研究*[J].物理学报,2013,(9):415-420,6.基金项目
黑龙江省普通高等学校青年学术骨干支持计划项目(批准号:1252G032)资助的课题.*Project supported by the Foundation for Young Key Scholars of Higher Education Institution of Heilongjiang Province, China (Grant No.1252G032) （批准号:1252G032）
