Polarized neutron reflection as a probe of magnetic films and multilayers

Blundell, S. J.; Bland, J. A. C.

doi:10.1103/physrevb.46.3391

Cited by 188 publications

(90 citation statements)

References 16 publications

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“…It is known that PNR is a very precise tool to measure accurate average magnetic moment specially for magnetic thin films, as it is insensitive to thin film dimensions. [42] Figure 4 shows PNR patterns of Fe-N thin films deposited using HiPIMS(a) and dc-MS(b) prepared at varying R N2 . The obtained PNR patterns were fitted using a computer program based on the Parratt formalism [43] and the average magnetic moment was calculated.…”

Section: Resultsmentioning

confidence: 99%

Study of magnetic iron nitride thin films deposited by high power impulse magnetron sputtering

Tayal

Gupta

et al. 2015

Surface and Coatings Technology

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In this work, we studied phase formation, structural and magnetic properties of iron-nitride (Fe-N) thin films deposited using high power impulse magnetron sputtering (HiPIMS) and direct current magnetron sputtering (dc-MS). The nitrogen partial pressure during deposition was systematically varied both in HiPIMS and dc-MS. Resulting Fe-N films were characterized for their microstructure, magnetic properties and nitrogen concentration. We found that HiPIMS deposited Fe-N films show a globular nanocrystalline microstructure and improved soft magnetic properties. In addition, it was found that the nitrogen reactivity impedes in HiPIMS as compared to dc-MS. Obtained results can be understood in terms of distinct plasma properties of HiPIMS.

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Section: Resultsmentioning

confidence: 99%

Study of magnetic iron nitride thin films deposited by high power impulse magnetron sputtering

Tayal

Gupta

et al. 2015

Surface and Coatings Technology

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“…Figure 2 shows s͑Q͒ calculated for an In layer with the "local" and "nonlocal" field profiles; details on the formalism are available in Ref. 19. The simulations indicate that the difference between spin asymmetries for the local and nonlocal approaches can be of the order of 10%, which is feasible for state-of-the-art PNR facilities.…”

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confidence: 91%

Evidence for nonmonotonic magnetic field penetration in a type-I superconductor

et al. 2008

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Polarized neutron reflectometry (PNR) provides evidence that nonlocal electrodynamics governs the magnetic field penetration in an extreme low-κ superconductor. The sample is an indium film with a large elastic mean free path (11 µm) deposited on a silicon oxide wafer. It is shown that PNR can resolve the difference between the reflected neutron spin asymmetries predicted by the local and nonlocal theories of superconductivity. The experimental data support the nonlocal theory, which predicts a nonmonotonic decay of the magnetic field.

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“…The solutions of the particle wave equations in these slabs are implemented in a matrix formalism that calculates the spin-dependent neutron reflectivities of magnetically noncollinear media as a function of the neutron wave vector transfer Qϭ4 sin( )/ . 37 The influence of absorption ͑imaginary part of b i ) on calculations of the reflectivity is negligible in the wave vector range used in the present PNR experiments. To our knowledge, no analytical expressions exist that describe the influence of both the nuclear and the magnetic roughness of noncollinear systems on PNR simulations in a similar way as the expressions derived by Névot and Croce for GIXR.…”

Section: To Obtain the Reflectivities R(↑↑) R(↓↓) R(↑↓) And R(↓↑)mentioning

confidence: 88%

Magnetic interlayer exchange coupling in epitaxialFe/Si/Fe(001)studied by polarized neutron reflectometry

et al. 2002

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Polarized neutron reflectometry ͑PNR͒ has been used to investigate the magnetic interlayer coupling in a MBE-grown Fe/Si/Fe͑001͒ sandwich at room temperature and at 10 K. Both the magnitude and orientation of the magnetic moments of the Fe layers are obtained from a rigorous analysis of the PNR data. Orthogonal configurations of the Fe magnetizations were observed, providing unambiguous evidence for the presence of a biquadratic term in the exchange coupling energy. The competition between the bilinear and biquadratic exchange couplings results in distinct orthogonal and antiparallel configurations of the Fe magnetizations at room temperature. A previously unresolved magnetic configuration in the room-temperature hysteresis curve was identified by the PNR measurements as a 180°spin-flop transition. The dominant role of the biquadratic coupling at low temperatures is evident from the orthogonal configuration of the magnetizations at remanence in the measurements at Tϭ10 K. The magnetic configurations deduced by PNR are in good agreement with those obtained by fitting the magnetic hysteresis loops using a global energy minimum calculation.

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Polarized neutron reflection as a probe of magnetic films and multilayers

Cited by 188 publications

References 16 publications

Study of magnetic iron nitride thin films deposited by high power impulse magnetron sputtering

Study of magnetic iron nitride thin films deposited by high power impulse magnetron sputtering

Evidence for nonmonotonic magnetic field penetration in a type-I superconductor

Magnetic interlayer exchange coupling in epitaxialFe/Si/Fe(001)studied by polarized neutron reflectometry

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