Exchange bias studied with polarized neutron reflectivity

Title: Exchange bias studied with polarized neutron reflectivity

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Abstract

The role of Polarized Neutron Reflectivity (PNR) for studying natural and synthetic exchange biased systems is illustrated. For a partially oxidized thin film of Co, cycling of the magnetic field causes a considerable reduction of the bias, which the onset of diffuse neutron scattering shows to be due to the loosening of the ferromagnetic domains. On the other hand, PNR measurements of a model exchange bias junction consisting of an n-layered Fe/Cr antiferromagnetic (AF) superlattice coupled with an m-layered Fe/Cr ferromagnetic (F) superlattice confirm the predicted collinear magnetization in the two superlattices. The two magnetized states of the F (along or opposite to the bias field) differ only in the relative orientation of the F and adjacent AF layer. The possibility of reading clearly the magnetic state at the interface pinpoints the commanding role that PNR is having in solving this intriguing problem.

Authors:: te Velthuis, S. G. E.

Publication Date:: Wed Jan 05 00:00:00 EST 2000

Research Org.:: Argonne National Lab., IL (US)

Sponsoring Org.:: US Department of Energy (US)

OSTI Identifier:: 751869

Report Number(s):: ANL/IPNS/CP-100838
TRN: US0003294

DOE Contract Number:: W-31109-ENG-38

Resource Type:: Conference

Resource Relation:: Conference: Hercules X Euro Conference, Grenoble (FR), 04/06/2000--04/09/2000; Other Information: PBD: 5 Jan 2000

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; POLARIZED BEAMS; NEUTRONS; REFLECTIVITY; DIAGNOSTIC TECHNIQUES; COBALT; IRON; CHROMIUM; SUPERLATTICES; MAGNETIZATION; MAGNETIC PROPERTIES

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                    te Velthuis, S. G. E. Exchange bias studied with polarized neutron reflectivity.  United States: N. p., 2000. 
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                    te Velthuis, S. G. E. Exchange bias studied with polarized neutron reflectivity.  United States.

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                    te Velthuis, S. G. E. 2000.  
        "Exchange bias studied with polarized neutron reflectivity".  United States.  https://www.osti.gov/servlets/purl/751869.

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@article{osti_751869,

  title        = {Exchange bias studied with polarized neutron reflectivity},

  author       = {te Velthuis, S. G. E.},

  abstractNote = {The role of Polarized Neutron Reflectivity (PNR) for studying natural and synthetic exchange biased systems is illustrated. For a partially oxidized thin film of Co, cycling of the magnetic field causes a considerable reduction of the bias, which the onset of diffuse neutron scattering shows to be due to the loosening of the ferromagnetic domains. On the other hand, PNR measurements of a model exchange bias junction consisting of an n-layered Fe/Cr antiferromagnetic (AF) superlattice coupled with an m-layered Fe/Cr ferromagnetic (F) superlattice confirm the predicted collinear magnetization in the two superlattices. The two magnetized states of the F (along or opposite to the bias field) differ only in the relative orientation of the F and adjacent AF layer. The possibility of reading clearly the magnetic state at the interface pinpoints the commanding role that PNR is having in solving this intriguing problem.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/751869},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Jan 05 00:00:00 EST 2000},

  month        = {Wed Jan 05 00:00:00 EST 2000}

}

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