Influence of controlled surface oxidation on the magnetic anisotropy of Co ultrathin films

被引：25
作者：
Di, N. [1 ]
Kubal, J. [2 ]
Zeng, Z. [2 ]
Greeley, J. [2 ]
Maroun, F. [1 ]
Allongue, P. [1 ]
机构：
[1] Ecole Polytech, Phys Matiere Condensee, CNRS, F-91128 Palaiseau, France
[2] Purdue Univ, Sch Chem Engn, W Lafayette, IN 47907 USA
来源：
APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 12期
关键词：
AUGMENTED-WAVE METHOD; IN-SITU STM; TRENDS; LAYERS; WATER; OXIDE;
D O I：
10.1063/1.4916554
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We studied the influence of controlled surface-limited oxidation of electrodeposited epitaxial Co(0001)/Au(111) films on their magnetic anisotropy energy using real time in situ magneto optical Kerr effect and density functional theory (DFT) calculations. We investigated the Co first electrochemical oxidation step which we demonstrate to be completely reversible and determined the structure of this oxide layer. We show that the interface magnetic anisotropy of the Co film increases by 0.36 erg/cm(2) upon Co surface oxidation. We performed DFT calculations to determine the different surface structures in a wide potential range as well as the charge transfer at the Co surface. Our results suggest that the magnetic anisotropy change is correlated with a positive charge increase of 0.54e(-) for the Co surface atom upon oxidation. (C) 2015 AIP Publishing LLC.
引用
收藏
页数：4
相关论文
共 23 条
  • [1] Electrodeposition of Co and Ni/Au(111) ultrathin layers.: Part I:: nucleation and growth mechanisms from in situ STM
    Allongue, P
    Cagnon, L
    Gomes, C
    Gündel, A
    Costa, V
    [J]. SURFACE SCIENCE, 2004, 557 (1-3) : 41 - 56
  • [2] Bauer U, 2015, NAT MATER, V14, P174, DOI [10.1038/nmat4134, 10.1038/NMAT4134]
  • [3] Magnetoelectric Charge Trap Memory
    Bauer, Uwe
    Przybylski, Marek
    Kirschner, Juergen
    Beach, Geoffrey S. D.
    [J]. NANO LETTERS, 2012, 12 (03) : 1437 - 1442
  • [4] PROJECTOR AUGMENTED-WAVE METHOD
    BLOCHL, PE
    [J]. PHYSICAL REVIEW B, 1994, 50 (24): : 17953 - 17979
  • [5] Reversible change in the oxidation state and magnetic circular dichroism of Fe driven by an electric field at the FeCo/MgO interface
    Bonell, F.
    Takahashi, Y. T.
    Lam, D. D.
    Yoshida, S.
    Shiota, Y.
    Miwa, S.
    Nakamura, T.
    Suzuki, Y.
    [J]. APPLIED PHYSICS LETTERS, 2013, 102 (15)
  • [6] Enhanced interface perpendicular magnetic anisotrophy in electrodeposited Co/Au(111) layers
    Cagnon, L
    Devolder, T
    Cortes, R
    Morrone, A
    Schmidt, JE
    Chappert, C
    Allongue, P
    [J]. PHYSICAL REVIEW B, 2001, 63 (10) : 1044191 - 10441912
  • [7] Chazalviel J.-N., 1998, COULOMB SCREENING MO
  • [8] Chiba D, 2011, NAT MATER, V10, P853, DOI [10.1038/NMAT3130, 10.1038/nmat3130]
  • [9] Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study
    Dudarev, SL
    Botton, GA
    Savrasov, SY
    Humphreys, CJ
    Sutton, AP
    [J]. PHYSICAL REVIEW B, 1998, 57 (03) : 1505 - 1509
  • [10] Feitknecht W., 1935, HELV CHIM ACTA, V18, P1369
123