Fe–N alloy films prepared using a nitrogen atom source

Telling, N.D; Jones, G.A; Grundy, P.J; Blythe, H.J

doi:10.1016/s0304-8853(00)01103-3

Interfacial structure and half-metallic ferromagnetism inCo2MnSi-based magnetic tunnel junctions (2006)
Journal Article
Telling, N. D., Keatley, P. S., van der Laan, G., Hicken, R. J., Arenholz, E., Sakuraba, Y., …Miyazaki, T. Interfacial structure and half-metallic ferromagnetism inCo2MnSi-based magnetic tunnel junctions. Physical review B: Condensed matter and materials physics, 74(22), https://doi.org/10.1103/physrevb.74.224439

X-ray absorption (XAS) and x-ray magnetic circular dichroism (XMCD) techniques are utilized to explore the ferromagnetic/barrier interface in Co 2 Mn Si full Heusler alloy magnetic tunnel junctions. Structural and magnetic properties of the in... Read More about Interfacial structure and half-metallic ferromagnetism inCo2MnSi-based magnetic tunnel junctions.

XAS and XMCD Evidence for Species-Dependent Partitioning of Arsenic During Microbial Reduction of Ferrihydrite to Magnetite (2006)
Journal Article
Coker, V. S., Gault, A. G., Pearce, C. I., van der Laan, G., Telling, N. D., Charnock, J. M., …Lloyd, J. R. (2006). XAS and XMCD Evidence for Species-Dependent Partitioning of Arsenic During Microbial Reduction of Ferrihydrite to Magnetite. Environmental Science and Technology, 40(24), 7745-7750. https://doi.org/10.1021/es060990%2B

Poorly crystalline Fe(III) oxyhydroxides, ubiquitously distributed as mineral coatings and discrete particles in aquifer sediments, are well-known hosts of sedimentary As. Microbial reduction of these phases is widely thought to be responsible for th... Read More about XAS and XMCD Evidence for Species-Dependent Partitioning of Arsenic During Microbial Reduction of Ferrihydrite to Magnetite.

Facility for combined in situ magnetron sputtering and soft x-ray magnetic circular dichroism (2006)
Journal Article
Telling, N. D., van der Laan, G., Georgieva, M. T., & Farley, N. R. S. (2006). Facility for combined in situ magnetron sputtering and soft x-ray magnetic circular dichroism. Review of Scientific Instruments, 77(7), https://doi.org/10.1063/1.2219719

An ultrahigh vacuum chamber that enables the in situ growth of thin films and multilayers by magnetron sputtering techniques is described. Following film preparation, x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) me... Read More about Facility for combined in situ magnetron sputtering and soft x-ray magnetic circular dichroism.

Evidence of a barrier oxidation dependence on the interfacial magnetism in Co/alumina based magnetic tunnel junctions (2006)
Journal Article
Telling, N. D., van der Laan, G., Ladak, S., Hicken, R. J., & Arenholz, E. (2006). Evidence of a barrier oxidation dependence on the interfacial magnetism in Co/alumina based magnetic tunnel junctions. Journal of Applied Physics, 99(8), https://doi.org/10.1063/1.2171002

edge have been applied to explore the near-interfacial magnetism of Co electrodes in Co/alumina based magnetic tunnel junctions. By taking into account the formation of CoO at the ferromagnetic (FM)/barrier interface, the change in the total magneti... Read More about Evidence of a barrier oxidation dependence on the interfacial magnetism in Co/alumina based magnetic tunnel junctions.

A link between the coercivity and microstructure of high moment Fe films and their use in magnetic tunnel junctions (2005)
Journal Article
Georgieva, M., Telling, N., & Grundy, P. (2006). A link between the coercivity and microstructure of high moment Fe films and their use in magnetic tunnel junctions. Materials Science and Engineering: B, 126(2-3), 287-291. https://doi.org/10.1016/j.mseb.2005.09.026

Magnetron sputtered single Fe films have been “softened” magnetically by controlled N-doping during the sputter deposition. This technique allows a reduction in grain size and coercivity of the Fe films, without decreasing the saturation magnetizatio... Read More about A link between the coercivity and microstructure of high moment Fe films and their use in magnetic tunnel junctions.

Spin and orbital moments of ultra-thin Fe films on various semiconductor surfaces (2005)
Journal Article
Claydon, J. S., Niu, D., Xu, Y., Telling, N. D., Kirkman, I. W., & van der Laan, G. (2005). Spin and orbital moments of ultra-thin Fe films on various semiconductor surfaces. IEEE Transactions on Magnetics, 41(10), 3325-3327. https://doi.org/10.1109/tmag.2005.855201

Probing magnetic ordering in multilayers using soft x-ray resonant magnetic scattering (2005)
Journal Article
Marrows, C. H., Steadman, P., Hampson, A. C., Michez, L., Hickey, B. J., Telling, N. D., …Langridge, S. Probing magnetic ordering in multilayers using soft x-ray resonant magnetic scattering. Physical review B: Condensed matter and materials physics, 72(2), Article 024421. https://doi.org/10.1103/physrevb.72.024421

We have carried out resonant magnetic x-ray scattering from Co ∕ Ru multilayers with weak antiferromagnetic coupling. We have measured hysteresis loops at different points in reciprocal space (specular or diffuse, integer or half-order peaks),... Read More about Probing magnetic ordering in multilayers using soft x-ray resonant magnetic scattering.

Spin polarization and barrier-oxidation effects at the Co∕alumina interface in magnetic tunnel junctions (2004)
Journal Article
Telling, N. D., van der Laan, G., Ladak, S., & Hicken, R. J. (2004). Spin polarization and barrier-oxidation effects at the Co∕alumina interface in magnetic tunnel junctions. Applied Physics Letters, 85(17), 3803-3805. https://doi.org/10.1063/1.1812383

The electronic structure and polarization in magnetic tunnel junctions prepared with varying degrees of barrier-layer oxidation have been studied using x-ray absorption spectroscopy across the absorption edges. It was found that the electron... Read More about Spin polarization and barrier-oxidation effects at the Co∕alumina interface in magnetic tunnel junctions.

Magnetically soft, high moment grain-refined Fe films: Application to magnetic tunnel junctions (2004)
Journal Article
Georgieva, M. T., Telling, N. D., Grundy, P. J., Faunce, C. A., & Jones, G. A. (2004). Magnetically soft, high moment grain-refined Fe films: Application to magnetic tunnel junctions. Journal of Applied Physics, 96(5), 2923-2926. https://doi.org/10.1063/1.1776627

The effect of -doping on the microstructure and magnetic properties of thin layers has been employed to construct all -electrode magnetic tunnel junctions that displayed the tunneling magnetoresistance (TMR) effect. Using low nitrogen doses, a... Read More about Magnetically soft, high moment grain-refined Fe films: Application to magnetic tunnel junctions.

Fe M2,3 X-ray resonant magnetic reflectivity on epitaxial Fe3−δO4 thin films (2003)
Journal Article
Telling, N., Haznar, A., van der Laan, G., Roper, M., Schedin, F., & Thornton, G. (2004). Fe M2,3 X-ray resonant magnetic reflectivity on epitaxial Fe3−δO4 thin films. Physica B: Condensed Matter, 345(1-4), 157-160. https://doi.org/10.1016/j.physb.2003.11.044

We report the use of soft X-ray resonant reflectivity at the Fe M2,3 edges to probe the magnetic circular dichroism of non-stoichiometric Fe3−δO4 thin films grown epitaxially on Al2O3. Photon energy scans of the magnetic dichroism display features th... Read More about Fe M2,3 X-ray resonant magnetic reflectivity on epitaxial Fe3−δO4 thin films.

Effect of local variations in interlayer coupling on magnetization reversal in spin-valve multilayers (2003)
Journal Article
Telling, N., Jones, G., Georgieva, M., & Grundy, P. (2004). Effect of local variations in interlayer coupling on magnetization reversal in spin-valve multilayers. Journal of Magnetism and Magnetic Materials, 272-276, 1274-1275. https://doi.org/10.1016/j.jmmm.2003.12.452

Using a simple phenomenological model we have studied magnetization reversal in spin-valve systems in the presence of local variations in interlayer coupling. By considering a Gaussian distribution of the coupling energy it is shown that for a suffic... Read More about Effect of local variations in interlayer coupling on magnetization reversal in spin-valve multilayers.

Induced V and reduced Co magnetic moments at the V/Co interface (2003)
Journal Article
Huttel, Y., van der Laan, G., Johal, T. K., Telling, N. D., & Bencok, P. Induced V and reduced Co magnetic moments at the V/Co interface. Physical Review B (Condensed Matter), 68(17), https://doi.org/10.1103/physrevb.68.174405

Using x-ray magnetic circular dichroism (XMCD) the vanadium and cobalt magnetic moments at the V/Co interface have been extracted for different V and Co thicknesses. We find a large magnetic moment induced on the V that is coupled antiferromagnetic t... Read More about Induced V and reduced Co magnetic moments at the V/Co interface.

Ion irradiation of Co/Pt multilayer films (2003)
Journal Article
Bonder, M. J., Telling, N. D., Grundy, P. J., Faunce, C. A., Shen, T., & Vishnyakov, V. M. (2003). Ion irradiation of Co/Pt multilayer films. Journal of Applied Physics, 93(10), 7226-7228. https://doi.org/10.1063/1.1557311

This article describes a microstructural and magnetic investigation of the modification of Co/Pt multilayer films by Ar ion irradiation which results in a change of the orientation of the magnetization from perpendicular to the film plane to the in-p... Read More about Ion irradiation of Co/Pt multilayer films.

Observation of ion beam induced magnetic patterning using off-specular polarized neutron reflectometry (2003)
Journal Article
Telling, N. D., Langridge, S., Dalgliesh, R. M., Grundy, P. J., & Vishnyakov, V. M. (2003). Observation of ion beam induced magnetic patterning using off-specular polarized neutron reflectometry. Journal of Applied Physics, 93(10), 7420-7422. https://doi.org/10.1063/1.1544496

The long-range magnetic structure in Co/Pt multilayers magnetically patterned by ion irradiation is observed by off-specular polarized neutron reflectivity. While both specular and off-specular measurements indicate the formation of an artificial dom... Read More about Observation of ion beam induced magnetic patterning using off-specular polarized neutron reflectometry.

Spin-valve magnetization reversal obtained by N-doping in Fe/insulator/Fe trilayers (2003)
Journal Article
Georgieva, M. T., Telling, N. D., Jones, G. A., Grundy, P. J., Hase, T. P. A., & Tanner, B. K. (2003). Spin-valve magnetization reversal obtained by N-doping in Fe/insulator/Fe trilayers. Journal of Physics: Condensed Matter, 15(4), 617-624. https://doi.org/10.1088/0953-8984/15/4/302

The effect of N-doping on the microstructure and coercivity of the 'free' Fe layer in Fe/insulator/Fe trilayers has been examined. It was found that N-doping leads to a magnetic softening of the Fe layer and a corresponding reduction in the grain siz... Read More about Spin-valve magnetization reversal obtained by N-doping in Fe/insulator/Fe trilayers.

Synchrotron X-ray diffraction measurements of the FCC/FCT phase transformation in PtMnCr pinning layers (2001)
Journal Article
Holloway, L., Laidler, H., Hughes, T., Telling, N., Linville, E., Mao, S., & Kief, M. (2002). Synchrotron X-ray diffraction measurements of the FCC/FCT phase transformation in PtMnCr pinning layers. Journal of Magnetism and Magnetic Materials, 242-245, 1112-1114. https://doi.org/10.1016/s0304-8853%2801%2901120-9

We examine the change in structure of the pinning layer of PtMnCr/NiFe bilayers in the as-deposited state and upon annealing, using synchrotron radiation. The X-ray measurements show that the degree of transformation of the FCC phase of PtMnCr to the... Read More about Synchrotron X-ray diffraction measurements of the FCC/FCT phase transformation in PtMnCr pinning layers.

Role of crystallographic structure on magnetization reversal of (101̄0) and (112̄0) textured thin film media (2001)
Journal Article
Holloway, L., Laidler, H., Telling, N. D., & Wu, S. Z. (2001). Role of crystallographic structure on magnetization reversal of (101̄0) and (112̄0) textured thin film media. Journal of Applied Physics, 90(8), 4056-4062. https://doi.org/10.1063/1.1400101

In this study we examine the role of crystallographic structure on the magnetization reversal of two CoCrPtTa thin films grown on different underlayers which provide either a [112̄0] or a [101̄0] preferred orientation. We report synchrotron x-ray mea... Read More about Role of crystallographic structure on magnetization reversal of (101̄0) and (112̄0) textured thin film media.

Preparation of short-period Fe-N magnetic multilayers using an atomic nitrogen beam (2001)
Journal Article
Telling, N., Bonder, M., Jones, G., Faunce, C., Grundy, P., Lord, D., & Joyce, D. (2001). Preparation of short-period Fe-N magnetic multilayers using an atomic nitrogen beam. IEEE Transactions on Magnetics, 37(4), 2308-2310. https://doi.org/10.1109/20.951156

Magnetic multilayers containing Fe-N layers with bilayer periods of between /spl sim/15-84 /spl Aring/ and sharp interfaces, are successfully grown using an atomic (free radical) nitrogen beam. The phase composition and microstructure is found to be... Read More about Preparation of short-period Fe-N magnetic multilayers using an atomic nitrogen beam.

Interdiffusion in direct ion beam deposited isotopic Fe/Si trilayers (2001)
Journal Article
Telling, N. D., Faunce, C. A., Bonder, M. J., Grundy, P. J., Lord, D. G., Van den Berg, J. A., & Langridge, S. (2001). Interdiffusion in direct ion beam deposited isotopic Fe/Si trilayers. Journal of Applied Physics, 89(11), 7074-7076. https://doi.org/10.1063/1.1357151

Interdiffusion and intermixing have been examined in Fe/Si trilayers prepared with ions of different energies, using the direct ion beam deposition technique. Isotope-pure layers were deposited and spin-polarized neutron reflectivity used to determin... Read More about Interdiffusion in direct ion beam deposited isotopic Fe/Si trilayers.

Fe–N alloy films prepared using a nitrogen atom source (2001)
Journal Article
Telling, N., Jones, G., Grundy, P., & Blythe, H. (2001). Fe–N alloy films prepared using a nitrogen atom source. Journal of Magnetism and Magnetic Materials, 226-230, 1659-1661. https://doi.org/10.1016/s0304-8853%2800%2901103-3

We have studied the magnetic and structural properties of Fe–N alloy films prepared by magnetron sputtering in the presence of a highly reactive beam of atomic nitrogen. The nitrogen content was varied by altering the exposure time of the growing fil... Read More about Fe–N alloy films prepared using a nitrogen atom source.

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