Magnetic Properties of Fe Films on Cr(100)

Berger, Andreas; Hopster, H.

doi:10.1103/physrevlett.73.193

Cited by 74 publications

(56 citation statements)

References 17 publications

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“…In the last few years there has been a great deal of interest in studying the unique properties of magnetic nanostructures, involving small magnetic entities whose sizes are comparable to the DW width d, in which there is a coexistence of ferromagnetic (FM) and antiferromagnetic (AF) exchange interactions [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. One important class of nanostructures involves FM/AF bilayers [7][8][9][10][11][12][13][14][15][16][17][18], prominently featured in spin-valve field sensing devices with technological importance [19].…”

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Asymmetry in Elementary Events of Magnetization Reversal in a Ferromagnetic/Antiferromagnetic Bilayer

et al. 2000

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Real-time magneto-optical indicator film images reveal distinct asymmetry in the motion of a single domain wall in a wedged-NiFe /uniform-FeMn bilayer due to the nucleation and behavior of an exchange spring in the antiferromagnetic layer. Magnetization reversal from the ground state begins at the thick end of the wedge where the exchange anisotropy field ͑H E ͒ is minimal and the magnetostatic field ͑H MS ͒ is maximal, whereas reversal into the ground state begins from the thin end where H E is maximal and H MS is minimal.

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“…One important class of nanostructures involves FM/AF bilayers [7][8][9][10][11][12][13][14][15][16][17][18], prominently featured in spin-valve field sensing devices with technological importance [19]. When a FM/AF bilayer is cooled in a magnetic field ͑H͒ to below the Néel temperature, a unidirectional (exchange) anisotropy is created [3].…”

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Asymmetry in Elementary Events of Magnetization Reversal in a Ferromagnetic/Antiferromagnetic Bilayer

et al. 2000

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“…Despite the importance of the AFM/FM system in technology, the AFM/FM interfacial interaction is much more complicated than the FM/FM interfacial interaction because of the magnetic frustration that the nearest neighbor interaction energy cannot be minimized for all pairs of spins at the same time [3]. The magnetic interfacial frustration becomes even more complicated when interfacial roughness is present in real experimental systems.…”

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FeMn/Fe/Co/Cu(1,1,10) films studied using the magneto-optic Kerr effect and photoemission electron microscopy

Meng

Tan

et al. 2011

Phys. Rev. B

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FeMn/Fe/Co/Cu(1,1,10) films were grown epitaxially and investigated using Magneto-Optic Kerr Effect and Photoemission Electron Microscopy. We found that the FeMn/Fe/Co/Cu(1,1,10) exhibits the same property as FeMn/Co/Cu(1,1,10) for ferromagnetic phase of the fcc Fe film, but a different property for non-ferromagnetic phase of the fcc Fe film. The result indicates that the characteristic property reported in the literature for FeMn/Co/Cu(001) comes from the FeMn spin structure, and is independent of the ferromagnetic layer.

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“…75.60.Ch, 75.70.Ak In many experiments, which had been performed for ultrathin ferromagnetic films and multilayers, either a nonlinear or almost linear law of the coercivity decrease with the increase in the film temperature has been found (for a review see Refs. [1][2][3][4]). This decrease can be understood as coming from a mechanism of thermally activated domain wall (DW) motion.…”

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“…[1][2][3][4]). This decrease can be understood as coming from a mechanism of thermally activated domain wall (DW) motion.…”

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Coercivity of Ultrathin Magnetic Films with Perpendicular Anisotropy

et al. 2000

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The calculation of the temperature dependence of the domain wall coercivity of ultrathin magnetic films with perpendicular anisotropy is reported. In this case, the magnetization reversal is supposed to occur through domain wall motion. The proposed model takes into account thermal bending fluctuations of the domain wall , which is pinned by crystal defects such as grain boundaries. A fitting procedure, applied to recently published experimental data on the field induced domain wall velocity in Au/Co films, allows us to find out realistic values of the involved parameters.PACS numbers: 75.60. 75.60.Ch, 75.70.Ak In many experiments, which had been performed for ultrathin ferromagnetic films and multilayers, either a nonlinear or almost linear law of the coercivity decrease with the increase in the film temperature has been found (for a review see Refs. [1][2][3][4]). This decrease can be understood as coming from a mechanism of thermally activated domain wall (DW) motion. Indeed, the DW coercivity at T = 0 is determined by a value of the energy barrier which separates two different positions of a DW segment. At T > 0 the energy of thermal oscillations of the . DW segment favours to overcome the coercivity barrier and decreases its effective value.The goal of this paper is to thermodynamically examine the bending oscillation of DW and the mechanism of their movement in ultrathin magnetic films with a perpendicular anisotropy. The basis is the DW vibration model similar to that applied in Ref. [5] for the description of the bend fluctuations of long molecules.Let us suppose that a segment of the DW is pinned to two defects (or to grain boundaries) and that the distance between them is 2R. We consider a limp type of DW and a weak DW pinning regime. For T > 0 the DW can change its form owing to the effect of the temperature fluctuations. We will describe the form of the DW bend by the following equation y = b/ch(x/R) (here b is the amplitude of the DW bending). The magnetic field is directed perpendicular to the film surface.(471)

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Magnetic Properties of Fe Films on Cr(100)

Cited by 74 publications

References 17 publications

Asymmetry in Elementary Events of Magnetization Reversal in a Ferromagnetic/Antiferromagnetic Bilayer

Asymmetry in Elementary Events of Magnetization Reversal in a Ferromagnetic/Antiferromagnetic Bilayer

FeMn/Fe/Co/Cu(1,1,10) films studied using the magneto-optic Kerr effect and photoemission electron microscopy

Coercivity of Ultrathin Magnetic Films with Perpendicular Anisotropy

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