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Cho, Jaehun,Kim, Nam-Hui,Jung, Jinyong,Han, Dong-Soo,Swagten, Henk J. M.,Kim, June-Seo,You, Chun-Yeol IEEE 2018 IEEE transactions on magnetics Vol.54 No.6
<P>We investigate the interfacial Dzyaloshinskii–Moriya interaction (iDMI) and the perpendicular magnetic anisotropy (PMA) in the annealed inversion symmetry breaking structures (Pt/Co (CoFeB)/AlO<SUB><I>x</I></SUB> and Ta/CoFeB/AlO<SUB><I>x</I></SUB>) by Brillouin light scattering. The iDMI energy density of Pt/Co and Pt/CoFeB samples decreases while increasing annealing temperature, but the iDMI energy density of Ta/CoFeB sample slightly increases by increasing annealing temperature. By applying the thermal annealing process, PMA energies slightly increase at the Pt/Co interface; however, Pt/CoFeB, (Ta/CoFeB) structures are dramatically decreased (increased) by the annealing process. The effects of the annealing show complicate variation for iDMI and PMA for each structure; however, we find overall weak correlations between iDMI and PMA despite different materials and annealing process.</P>
Heinen Jan,Schulz Tomek,Kl¨aui Mathias,Boulle Olivier,Malinowski Gregory,Swagten Henk,Koopmans Bert,Ulysse Christian,Faini Giancarlo,Ocker Berthold,Wrona Jerzy,Ahn Sung-Min,Nguyen Ngoc-Minh,Ravelosona 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.10
We determine in high anisotropy Pt/Co- and Ni/Co-based multilayer materials, which are candidates for high density storage applications, the contributions to the extraordinary Hall effect. In order to gain more insight into the physics underlying these processes, the dependence of the extraordinary Hall resistivity on the longitudinal resistivity is used to identify the skew scattering and the combined intrinsic and side jump effects when analyzing their variation with temperature. Furthermore, the influence of an additional amorphous CoFeB layer is shown, revealing a possibility to enhance the extraordinary Hall effect using this material.