Magnetic state modification induced by superconducting response in ferromagnet/superconductor Nb/Co superlattices
Magnetic state modification induced by superconducting response in ferromagnet/superconductor Nb/Co superlattices
复制标题
铁磁体/超导体 Nb/Co 超晶格中超导响应引起的磁态改变
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
J. Guimpel
中科院分区：
文献类型：
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作者：
C. Monton;F. D. L. Cruz;J. Guimpel
超导体/铁磁体 Nb/Co 超晶格中的磁化测量显示出作为温度、应用场和样品历史函数的复杂行为。基于一个简单的模型，表明这种行为是由于超导体磁化温度依赖性、铁磁体磁化时间依赖性以及两种材料的杂散场之间的相互作用造成的。还表明，Co 层的磁性状态被 Nb 超导响应所改变，这意味着超导体/铁磁异质样品的问题必须以自洽的方式解决。
Magnetization measurements in superconductor/ferromagnet Nb/Co superlattices show a complex behavior as a function of temperature, applied field and sample history. In base to a simple model it is shown that this behavior is due to an interplay between the superconductor magnetization temperature dependence, the ferromagnet magnetization time dependence, and the stray fields of both materials. It is also shown that the magnetic state of the Co layers is modified by the Nb superconducting response, implying that the problem of a superconductor/ferromagnetic heterogeneous sample has to be solved in a self-consistent manner.