Exchange bias studied with polarized neutron reflectivity

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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 ... continued below

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4 p.

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te Velthuis, S. G. E. January 5, 2000.

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Description

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.

Physical Description

4 p.

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INIS; OSTI as DE00751869

Medium: P; Size: 4 pages

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  • Hercules X Euro Conference, Grenoble (FR), 04/06/2000--04/09/2000

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  • Report No.: ANL/IPNS/CP-100838
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 751869
  • Archival Resource Key: ark:/67531/metadc703869

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 5, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 10, 2017, 7:55 p.m.

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te Velthuis, S. G. E. Exchange bias studied with polarized neutron reflectivity, article, January 5, 2000; Illinois. (digital.library.unt.edu/ark:/67531/metadc703869/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.