Perzanowski Marcin, Zarzycki Arkadiusz, Gregor-Pawlowski Jakub, Marszalek Marta
Deparment of Magnetic Materials and Nanostructures, Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland.
ACS Appl Mater Interfaces. 2020 Sep 2;12(35):39926-39934. doi: 10.1021/acsami.0c14115. Epub 2020 Aug 19.
Development of modern spintronic devices requires materials exhibiting specific magnetic effects. In this paper, we investigate a magnetization reversal mechanism in a [Co/Pd]/CoO/[Co/Pd] thin-film composite, where an antiferromagnet is sandwiched between a hard and a soft ferromagnets with different coercivities. The antiferromagnet/ferromagnet interfaces give rise to the exchange bias effect. The application of soft and hard ferromagnetic films causes exchange-spring-like behavior, while the choice of the Co/Pd multilayers provides large out-of-plane magnetic anisotropy. We observed that the magnitude and the sign of the exchange bias anisotropy field are related to the arrangement of the magnetic moments in the antiferromagnetic layer. This ordering is induced by the spin orientation present in neighboring ferromagnetic films, which is, in turn, dependent on the orientation and strength of the external magnetic field.
现代自旋电子器件的发展需要具有特定磁效应的材料。在本文中，我们研究了一种[Co/Pd]/CoO/[Co/Pd]薄膜复合材料中的磁化反转机制，其中反铁磁体夹在具有不同矫顽力的硬铁磁体和软铁磁体之间。反铁磁体/铁磁体界面产生交换偏置效应。软硬铁磁薄膜的应用导致类似交换弹簧的行为，而Co/Pd多层膜的选择提供了大的面外磁各向异性。我们观察到交换偏置各向异性场的大小和符号与反铁磁层中磁矩的排列有关。这种排序是由相邻铁磁薄膜中存在的自旋取向诱导的，而自旋取向又取决于外部磁场的取向和强度。
