Measurement and modeling of polarized specular neutron reflectivity in large magnetic fields

Maranville, Brian B.; Kirby, Brian J.; Grutter, Alexander J.; Kienzle, Paul A.; Majkrzak, Charles F.; Liu, Yaohua; Dennis, Cindi L.

doi:10.1107/S1600576716007135

Title: Measurement and modeling of polarized specular neutron reflectivity in large magnetic fields

Abstract

The presence of a large applied magnetic field removes the degeneracy of the vacuum energy states for spin-up and spin-down neutrons. For polarized neutron reflectometry, this must be included in the reference potential energy of the Schrödinger equation that is used to calculate the expected scattering from a magnetic layered structure. For samples with magnetization that is purely parallel or antiparallel to the applied field which defines the quantization axis, there is no mixing of the spin states (no spin-flip scattering) and so this additional potential is constant throughout the scattering region. When there is non-collinear magnetization in the sample, however, there will be significant scattering from one spin state into the other, and the reference potentials will differ between the incoming and outgoing wavefunctions, changing the angle and intensities of the scattering. In conclusion, the theory of the scattering and recommended experimental practices for this type of measurement are presented, as well as an example measurement.

Authors:

Maranville, Brian B. ^[1]; Kirby, Brian J. ^[1]; Grutter, Alexander J. ^[1]; Kienzle, Paul A. ^[1]; Majkrzak, Charles F. ^[1]; Liu, Yaohua ^[2]; Dennis, Cindi L. ^[3]

National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Material Measurement Lab.

Publication Date:: 2016-06-09

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1311226

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Crystallography (Online)

Additional Journal Information:: Journal Name: Journal of Applied Crystallography (Online); Journal Volume: 49; Journal Issue: 4; Journal ID: ISSN 1600-5767

Publisher:: International Union of Crystallography

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; polarized neutron reflectometry; applied magnetic fields; Zeeman corrections; non-collinear magnetization

Citation Formats


                    Maranville, Brian B., Kirby, Brian J., Grutter, Alexander J., Kienzle, Paul A., Majkrzak, Charles F., Liu, Yaohua, and Dennis, Cindi L. Measurement and modeling of polarized specular neutron reflectivity in large magnetic fields.  United States: N. p., 2016. 
Web.  doi:10.1107/S1600576716007135.

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                    Maranville, Brian B., Kirby, Brian J., Grutter, Alexander J., Kienzle, Paul A., Majkrzak, Charles F., Liu, Yaohua, & Dennis, Cindi L. Measurement and modeling of polarized specular neutron reflectivity in large magnetic fields.  United States.  https://doi.org/10.1107/S1600576716007135

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                    Maranville, Brian B., Kirby, Brian J., Grutter, Alexander J., Kienzle, Paul A., Majkrzak, Charles F., Liu, Yaohua, and Dennis, Cindi L. Thu .  
"Measurement and modeling of polarized specular neutron reflectivity in large magnetic fields".  United States.  https://doi.org/10.1107/S1600576716007135.  https://www.osti.gov/servlets/purl/1311226.

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@article{osti_1311226,

  title        = {Measurement and modeling of polarized specular neutron reflectivity in large magnetic fields},

  author       = {Maranville, Brian B. and Kirby, Brian J. and Grutter, Alexander J. and Kienzle, Paul A. and Majkrzak, Charles F. and Liu, Yaohua and Dennis, Cindi L.},

  abstractNote = {The presence of a large applied magnetic field removes the degeneracy of the vacuum energy states for spin-up and spin-down neutrons. For polarized neutron reflectometry, this must be included in the reference potential energy of the Schrödinger equation that is used to calculate the expected scattering from a magnetic layered structure. For samples with magnetization that is purely parallel or antiparallel to the applied field which defines the quantization axis, there is no mixing of the spin states (no spin-flip scattering) and so this additional potential is constant throughout the scattering region. When there is non-collinear magnetization in the sample, however, there will be significant scattering from one spin state into the other, and the reference potentials will differ between the incoming and outgoing wavefunctions, changing the angle and intensities of the scattering. In conclusion, the theory of the scattering and recommended experimental practices for this type of measurement are presented, as well as an example measurement.},

  doi          = {10.1107/S1600576716007135},

  journal      = {Journal of Applied Crystallography (Online)},

  number       = 4,

  volume       = 49,

  place        = {United States},

  year         = {2016},

  month        = {6}

}

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Works referenced in this record:

AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences
journal, July 2006

Dura, Joseph A.; Pierce, Donald J.; Majkrzak, Charles F.
Review of Scientific Instruments, Vol. 77, Issue 7
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Zeeman splitting of surface-scattered neutrons
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Felcher, G. P.; Adenwalla, S.; De Haan, V. O.
Nature, Vol. 377, Issue 6548
DOI: 10.1038/377409a0

Observation of the Zeeman splitting for neutrons reflected by magnetic layers
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Felcher, G. P.; Adenwalla, S.; De Haan, V. O.
Physica B: Condensed Matter, Vol. 221, Issue 1-4
DOI: 10.1016/0921-4526(95)00970-1

Vector magnetization depth profile of a Laves-phase exchange-coupled superlattice obtained using a combined approach of micromagnetic simulation and neutron reflectometry
journal, April 2006

Fitzsimmons, M. R.; Park, S.; Dumesnil, K.
Physical Review B, Vol. 73, Issue 13
DOI: 10.1103/PhysRevB.73.134413

Phase-sensitive specular neutron reflectometry for imaging the nanometer scale composition depth profile of thin-film materials
journal, February 2012

Kirby, B. J.; Kienzle, P. A.; Maranville, B. B.
Current Opinion in Colloid & Interface Science, Vol. 17, Issue 1
DOI: 10.1016/j.cocis.2011.11.001

Data representations of Zeeman spatial beam splitting in polarized neutron reflectometry
journal, July 2012

Kozhevnikov, Sergey; Ott, Frédéric; Radu, Florin
Journal of Applied Crystallography, Vol. 45, Issue 4
DOI: 10.1107/S0021889812018043

Polarization analysis of neutron reflectometry on non-collinear magnetic media: polarized neutron reflectometry experiments on a thin cobalt film
journal, June 2000

van de Kruijs, R. W. E.; Fredrikze, H.; Rekveldt, M. Th
Physica B: Condensed Matter, Vol. 283, Issue 1-3
DOI: 10.1016/S0921-4526(99)01935-3

Magnetic structure in Fe/Sm-Co exchange spring bilayers with intermixed interfaces
journal, May 2011

Liu, Yaohua; te Velthuis, S. G. E.; Jiang, J. S.
Physical Review B, Vol. 83, Issue 17
DOI: 10.1103/PhysRevB.83.174418

Works referencing / citing this record:

Optimization of reflectometry experiments using information theory
journal, February 2019

Treece, Bradley W.; Kienzle, Paul A.; Hoogerheide, David P.
Journal of Applied Crystallography, Vol. 52, Issue 1
DOI: 10.1107/s1600576718017016

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Similar Records

Title: Measurement and modeling of polarized specular neutron reflectivity in large magnetic fields

Abstract

Citation Formats

AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences journal, July 2006

Zeeman splitting of surface-scattered neutrons journal, October 1995

Observation of the Zeeman splitting for neutrons reflected by magnetic layers journal, April 1996

Vector magnetization depth profile of a Laves-phase exchange-coupled superlattice obtained using a combined approach of micromagnetic simulation and neutron reflectometry journal, April 2006

Phase-sensitive specular neutron reflectometry for imaging the nanometer scale composition depth profile of thin-film materials journal, February 2012

Data representations of Zeeman spatial beam splitting in polarized neutron reflectometry journal, July 2012

Polarization analysis of neutron reflectometry on non-collinear magnetic media: polarized neutron reflectometry experiments on a thin cobalt film journal, June 2000

Magnetic structure in Fe/Sm-Co exchange spring bilayers with intermixed interfaces journal, May 2011

Optimization of reflectometry experiments using information theory journal, February 2019

AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences
journal, July 2006

Zeeman splitting of surface-scattered neutrons
journal, October 1995

Observation of the Zeeman splitting for neutrons reflected by magnetic layers
journal, April 1996

Vector magnetization depth profile of a Laves-phase exchange-coupled superlattice obtained using a combined approach of micromagnetic simulation and neutron reflectometry
journal, April 2006

Phase-sensitive specular neutron reflectometry for imaging the nanometer scale composition depth profile of thin-film materials
journal, February 2012

Data representations of Zeeman spatial beam splitting in polarized neutron reflectometry
journal, July 2012

Polarization analysis of neutron reflectometry on non-collinear magnetic media: polarized neutron reflectometry experiments on a thin cobalt film
journal, June 2000

Magnetic structure in Fe/Sm-Co exchange spring bilayers with intermixed interfaces
journal, May 2011

Optimization of reflectometry experiments using information theory
journal, February 2019