2018/09/30 by Yoshishige Suzuki, Shinji Miwa · 23 citations
Energy · Materials Science · Physics and Astronomy · #Anisotropy #Condensed matter physics #Dipole #Electron #Ferromagnetism #Heusler alloys: electronic and magnetic properties #Iron oxide chemistry and applications #Magnetic anisotropy #Magnetic circular dichroism #Magnetic field #Magnetic moment #Magnetic properties of thin films #Magnetization #Physics #Quantum mechanics #Spectral line #Spin polarization #cond-mat.mtrl-sci
paper · pdf · doi:10.1016/j.physleta.2019.01.020
published in Physics Letters A 383(11), 1203-1206 (Elsevier BV)
arxiv created 2019/01/08 · openalex publication_date 2019/01/16 · arxiv updated 2019/03/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We have constructed an analytic formula to treat the perpendicular magnetic anisotropy energy in ferromagnetic metals with low symmetry, such as C4V and C3V. We find that the anisotropy energy is proportional to a part of the expectation values of the orbital angular momentum and magnetic dipole operator. Although the result is similar to the model proposed by Laan [J. Phys.: Condens. Matter 10, 3239 (1998)], we have derived a concrete expression for the spin-flip virtual excitation process term, which can be dominant in atoms with small magnetic moments and/or small exchange splitting. Pt monatomic layer with proximity-induced spin polarization grown on Fe is an example of this. Other multilayer systems such as Co/Pd and Co/Ni and bilayer systems such as Fe(CoB)/MgO can be discussed similarly. Moreover, the relation between perpendicular magnetic anisotropy energy and measurable physical parameters is discussed based on X-ray magnetic circular dichroism spectroscopy.