Chemical Structure and Magnetism of FeOx/Fe2O3 Interface Studied by X-ray Absorption Spectroscopy

被引：12
作者：
Mohamed, Ahmed Yousef [1 ,2 ,3 ]
Park, Won Goo [4 ]
Cho, Deok-Yong [1 ,2 ]
机构：
[1] Jeonbuk Natl Univ, IPIT, Jeonju 54896, South Korea
[2] Jeonbuk Natl Univ, Dept Phys, Jeonju 54896, South Korea
[3] South Valley Univ, Dept Phys, Qena 83523, Egypt
[4] Seoul Natl Univ, Inst Basic Sci, Ctr Correlated Electron Syst, Seoul 08826, South Korea
来源：
MAGNETOCHEMISTRY | 2020年 / 6卷 / 03期
基金：
新加坡国家研究基金会;
关键词：
FeOx; Fe2O3; X-ray absorption spectroscopy; X-ray magnetic circular dichroism; ferromagnet; antiferromagnet; ELECTRONIC-STRUCTURE; CIRCULAR-DICHROISM; FE-OXIDE; GAMMA-FE2O3; ORIGIN; FE3O4; FILMS; XMCD;
D O I：
10.3390/magnetochemistry6030033
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The chemical and magnetic states of Fe/Fe2O3 thin films prepared by e-beam evaporation were investigated by using element-specific techniques, X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD). It was clearly shown that the Fe layers are oxidized to form an antiferromagnetic (AFM) FeOx<1, while the bottom oxide remained a weak ferromagnet (wFM) (alpha+ gamma)-type Fe2O3. Dependences of the peak intensities and lineshapes on the Fe thickness and measurement geometry further demonstrate that FeOx<1 layers reside mostly at the interface realizing an FM (Fe)/AFM (FeOx)/wFM (Fe2O3), whilst the spin directions lie in the sample plane for all the samples. The self-stabilized intermediate oxide can act as a physical barrier for spins to be injected into the wFM oxide, implying a substantial influence on tailoring the spin tunneling efficiency for spintronics application.
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页码：1 / 10
页数：10
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共 49 条
  • [1] Evolution of structural properties of iron oxide nano particles during temperature treatment from 250 °C-900 °C: X-ray diffraction and Fe K-shell pre-edge X-ray absorption study
    Bora, Debajeet K.
    Braun, Artur
    Erat, Selma
    Safonova, Olga
    Graule, Thomas
    Constable, Edwin C.
    [J]. CURRENT APPLIED PHYSICS, 2012, 12 (03) : 817 - 825
  • [2] Evolution of an Oxygen Near-Edge X-ray Absorption Fine Structure Transition in the Upper Hubbard Band in α-Fe2O3 upon Electrochemical Oxidation
    Bora, Debajeet K.
    Braun, Artur
    Erat, Selma
    Ariffin, Ahmad K.
    Loehnert, Romy
    Sivula, Kevin
    Toepfer, Joerg
    Graetzel, Michael
    Manzke, Recardo
    Graule, Thomas
    Constable, Edwin C.
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (13) : 5619 - 5625
  • [3] Magnetic order in γ-Fe2O3 nanoparticles:: a XMCD study
    Brice-Profeta, S
    Arrio, MA
    Tronc, E
    Menguy, N
    Letard, I
    Moulin, CCD
    Noguès, M
    Chanéac, C
    Jolivet, JP
    Sainctavit, P
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 288 : 354 - 365
  • [4] Origin of Magnetism in Hydrothermally Aged 2-Line Ferrihydrite Suspensions
    Cao, Liang
    Jiang, Zhao-Xia
    Du, Yong-Hua
    Yin, Xin-Mao
    Xi, Shi-Bo
    Wen, Wen
    Roberts, Andrew P.
    Wee, Andrew T. S.
    Xiong, Yi-Min
    Liu, Qing-Song
    Gao, Xing-Yu
    [J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2017, 51 (05) : 2643 - 2651
  • [5] Investigation of the valence states of Fe and Co in Fe1-xCoxOy (0 &lt; x &lt; 1) thin films by x-ray absorption spectroscopy
    Chen, C. L.
    Dong, C. L.
    Rao, S. M.
    Chern, G.
    Chen, M. C.
    Wu, M. K.
    Chang, C. L.
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (25)
  • [6] Structure and magnetic properties of Fe/Fe oxide clusters
    Crisan, O.
    von Haeften, K.
    Ellis, A. M.
    Binns, C.
    [J]. JOURNAL OF NANOPARTICLE RESEARCH, 2008, 10 (Suppl 1) : 193 - 199
  • [7] XAS and XMCD studies of amorphous FeCo-based ribbons
    Gautam, Sanjeev
    Kane, Shanshank N.
    Park, B. -G.
    Kim, J. -Y.
    Varga, L. K.
    Song, J. -H.
    Chae, Keun Hwa
    [J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 2011, 357 (11-13) : 2228 - 2231
  • [8] Chemistry-dependent magnetic properties at the FeNi oxide-metal interface
    Genuzio, F.
    Mentes, T. O.
    Freindl, K.
    Spiridis, N.
    Korecki, J.
    Locatelli, A.
    [J]. JOURNAL OF MATERIALS CHEMISTRY C, 2020, 8 (17) : 5777 - 5785
  • [9] Epitaxial Growth and Magnetic Properties of Half-Metallic Fe3O4 on Si(100) Using MgO Buffer Layer
    Hassan, Sameh S. A.
    Xu, Yongbing
    Wu, Jing
    Thompson, Sarah M.
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 2009, 45 (10) : 4357 - 4359
  • [10] X-ray magnetic circular dichroism study of the blocking process in nanostructured iron-iron oxide core-shell systems
    Jimenez-Villacorta, F.
    Prieto, C.
    Huttel, Y.
    Telling, N. D.
    van der Laan, G.
    [J]. PHYSICAL REVIEW B, 2011, 84 (17):
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