Fe-W supermirrors for polarizing neutrons

Title: Fe-W supermirrors for polarizing neutrons

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Abstract

Polarized neutrons play an important role in scattering studies of condensed matter. Consequently, an efficient means of polarizing a neutron beam is very valuable. In addition to conventional, bulk single-crystal polarizers such as the Heusler alloy Cu{sub 2}MnAl, polarizing mirrors are often used for this purpose. Thin film bilayers of ferromagnetic Fe and nonmagnetic W have been deposited by sputtering on flat glass substreates according to a sequence of gradually varying bilayer thicknesses which in effect extends the critical angle for external mirror reflection for neutrons of one spin state when the Fe is magnetized in the plane of the film. The measured reflectivity of this Fe-W multilayer system is compared with that of other supermirror polarizers consisting of different materials and layer sequences. 14 refs., 3 figs.

Authors:

Majkrzak, C F; Neumann, D A ^[1]; Copley, J R.D. ^[2]; Dinardo, R P ^[3]

National Bureau of Standards, Washington, DC (USA). Inst. for Materials Science and Engineering
Maryland Univ., College Park, MD (USA). Dept. of Physics and Astronomy
Brookhaven National Lab., Upton, NY (USA)

Publication Date:: 1988-01-01

Research Org.:: Brookhaven National Lab., Upton, NY (United States)

Sponsoring Org.:: USDOE; USDOE, Washington, DC (United States)

OSTI Identifier:: 5694488

Report Number(s):: BNL-39912; CONF-871124-109
ON: DE91015228

DOE Contract Number:: AC02-76CH00016

Resource Type:: Conference

Resource Relation:: Conference: Fall meeting of the Materials Research Society, Boston, MA (United States), 30 Nov - 5 Dec 1987

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 07 ISOTOPES AND RADIATION SOURCES; IRON; SPUTTERING; MIRRORS; FABRICATION; NEUTRON BEAMS; POLARIZATION; TUNGSTEN; GLASS; LAYERS; REFLECTIVITY; SUBSTRATES; THIN FILMS; BEAMS; ELEMENTS; FILMS; METALS; NUCLEON BEAMS; OPTICAL PROPERTIES; PARTICLE BEAMS; PHYSICAL PROPERTIES; SURFACE PROPERTIES; TRANSITION ELEMENTS; 360101* - Metals & Alloys- Preparation & Fabrication; 070201 - Radiation Sources- Design, Fabrication & Operation

Citation Formats


                    Majkrzak, C F, Neumann, D A, Copley, J R.D., and Dinardo, R P. Fe-W supermirrors for polarizing neutrons.  United States: N. p., 1988. 
        Web.

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                    Majkrzak, C F, Neumann, D A, Copley, J R.D., & Dinardo, R P. Fe-W supermirrors for polarizing neutrons.  United States.

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                    Majkrzak, C F, Neumann, D A, Copley, J R.D., and Dinardo, R P. Fri .  
        "Fe-W supermirrors for polarizing neutrons".  United States.  https://www.osti.gov/servlets/purl/5694488.

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@article{osti_5694488,

  title        = {Fe-W supermirrors for polarizing neutrons},

  author       = {Majkrzak, C F and Neumann, D A and Copley, J R.D. and Dinardo, R P},

  abstractNote = {Polarized neutrons play an important role in scattering studies of condensed matter. Consequently, an efficient means of polarizing a neutron beam is very valuable. In addition to conventional, bulk single-crystal polarizers such as the Heusler alloy Cu{sub 2}MnAl, polarizing mirrors are often used for this purpose. Thin film bilayers of ferromagnetic Fe and nonmagnetic W have been deposited by sputtering on flat glass substreates according to a sequence of gradually varying bilayer thicknesses which in effect extends the critical angle for external mirror reflection for neutrons of one spin state when the Fe is magnetized in the plane of the film. The measured reflectivity of this Fe-W multilayer system is compared with that of other supermirror polarizers consisting of different materials and layer sequences. 14 refs., 3 figs.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/5694488},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1988},

  month        = {1}

}

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