Oscillation of the Fe and Co Magnetic Moments near the Sharp<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mn>1</mml:mn><mml:mi/><mml:mn>0</mml:mn><mml:mo>)</mml:mo></mml:math>Fe/Co Interface

Swinnen, Bart; Meersschaut, Johannes; Dekoster, J; Langouche, Guido; Cottenier, Stefaan; Demuynck, S.; Rots, M.

doi:10.1103/physrevlett.78.362

Cited by 27 publications

(2 citation statements)

References 17 publications

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“…The same sensitive dependence of the mm of the interfacial layer is reported for Fe/V/MgO and Fe/Co heterostructures. 49,50 In the following, we provide a qualitative understanding of this finding. On the one hand, our calculations suggest hybridization of Fe 3d with O 2p states, where the electronic structure of both Fe and O resemble the state of FeO, which explains the formation of polarized oxygen-derived states usually found at the Fe-MgO interface.…”

Section: Discussionmentioning

confidence: 97%

Interfacial geometry dependence of the iron magnetic moment: The case of MgO/Fe/MgO

2012

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The prediction and experimental demonstration of a very large magnetoresistance in Fe/MgO/Fe tunnel junctions have led to intense study of related systems in the last decade. In the present paper, we concentrate on the role of interface coordination, Fe thickness, and magnetization in the MgO/Fe/MgO mirror. By first-principles analysis, it is shown that the iron magnetic moment can rise up to 4 μ B , accounting for observed deviation of the Fe atoms in the vicinity of MgO interfaces. The origin is attributed to site preference predicted by our calculations, namely, that, unlike the case of Fe atoms in the monolayer range sitting just above the oxygen atoms of the MgO(001) substrate, the charge transfer induced by the O p-d Fe interaction leads to a structural distortion that stabilizes the Mg at the very first deposition stages of the capping layer, facing Fe sites.

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Section: Discussionmentioning

confidence: 97%

Interfacial geometry dependence of the iron magnetic moment: The case of MgO/Fe/MgO

2012

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“…It is possible that the reduction observed may be due to a decrease in magnetic polarization in this intermixed region. The magnetic moment of bcc Co across the Co/Fe(1 10) interface in multilayer structures of the form (2 nm Co/1-4 nm Fe) 10 /20 nm Fe/GaAs(1 10) has been determined experimentally by means of perturbed angular correlation (PAC) spectroscopy by Swinnen et al [1119][1120][1121][1122]. In this technique, trace amounts of diamagnetic atoms are implanted across the magnetic structure and modifications in the hyperfine field are used as probes of the local magnetic field, allowing the determination of the magnetization profile across the interface.…”

Section: Magnetic Moments Of Thin Co Filmsmentioning

confidence: 99%

Magnetism in ultrathin film structures

Vaz¹,

Bland²,

2008

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In this paper, we review some of the key concepts in ultrathin film magnetism which underpin nanomagnetism. We survey the results of recent experimental and theoretical studies of well characterized epitaxial structures based on Fe, Co and Ni to illustrate how intrinsic fundamental properties such as the magnetic exchange interactions, magnetic moment and magnetic anisotropies change markedly in ultrathin films as compared with their bulk counterparts, and to emphasize the role of atomic scale structure, strain and crystallinity in determining the magnetic properties. After introducing the key length scales in magnetism, we describe the 2D magnetic phase transition and survey studies of the thickness dependent Curie temperature and the critical exponents which characterize the paramagnetic-ferromagnetic phase transition. We next discuss recent experimental and theoretical results on the determination of the exchange constant, followed by an overview of measurements of the magnetic moment in the elemental 3d transition metal thin films in the various crystal phases that have been successfully stabilized, thereby illustrating the sensitivity of the magnetic moment to the local symmetry and to the atomic environment. Finally, we discuss briefly the magnetic anisotropies of Fe, Co and Ni in the fcc crystalline phase, to emphasize the role of structure and the details of the interface in influencing the magnetic properties. The dramatic effect that adsorbates can have on the magnetic anisotropies of thin magnetic films is also discussed. Our survey demonstrates that the fundamental properties, namely, the magnetic moment and magnetic anisotropies of ultrathin films have dramatically different behaviour compared with those of the bulk while the comparable size of the structural and magnetic contributions to the total energy of ultrathin structures results in an exquisitely sensitive dependence of the magnetic properties on the film structure.

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Surface and Interface Magnetism on the Atomic Scale

Bertschat

Frontiers in Magnetic Materials

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Oscillation of the Fe and Co Magnetic Moments near the Sharp(1−10)Fe/Co Interface

Cited by 27 publications

References 17 publications

Interfacial geometry dependence of the iron magnetic moment: The case of MgO/Fe/MgO

Interfacial geometry dependence of the iron magnetic moment: The case of MgO/Fe/MgO

Magnetism in ultrathin film structures

Surface and Interface Magnetism on the Atomic Scale

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