[14p-PA1-1~74] 10 スピントロニクス・マグネティクス

▲ [14p-PA1-6] Anatomy of Large Perpendicular Magnetic Anisotropy Energy in Co/Ni (111) multilayer

〇(P)Indra Pardede¹、Daiki Yoshikawa²、Tomosato Kanagawa²、Nurul Ikhsan²、Itsuki Murata²、Masao Obata^1,2、Tatsuki Oda^1,2 (1.Institute of Science and Engineering, Kanazawa Univ.、2.Graduate School of Natural Science and Technology, Kanazawa Univ.)

キーワード：Spintronics and Magnetics, Magnetic Anisotropy, First-principles calculation

In this work, we investigated the magnetic anisotropy energy (MAE) in the free-standing Co/Ni (111) multilayer as both Ni thickness dependence (t_Ni=1-4MLs) and number of multilayer repetition times (N=1-3) by means of a first-principles electronic structure calculation based on spin density functional theory. We included both contributions to the MAE from magnetocrystalline anisotropy energy (MCAE) originating from spin-orbit coupling and shape magnetic anisotropy energy (SMAE) originating from spin dipole-dipole interaction. The MCAE part was evaluated from both methods of total energy (TE) and grand-canonical force theorem (GCFT). The SMAE part was calculated by using a spin density approach (SDA). All MCAE values from the TE are well reproduced by those from the GCFT method. The present comprehensive study may provide a better understanding of magnetic properties in Co/Ni multilayers as widely used in spintronic devices.