Alignment of Iron Nanoparticles in a Magnetic Field Due to Shape Anisotropy

Radhakrishnan, Balasubramaniam; Nicholson, Don M; Eisenbach, Markus; Ludtka, Gerard Michael; Rios, Orlando; Parish, Chad M

doi:10.1016/j.jmmm.2015.07.007

Title: Alignment of Iron Nanoparticles in a Magnetic Field Due to Shape Anisotropy

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Abstract

During high magnetic field processing there is evidence for alignment of non-spherical metallic particles above the Curie temperature in alloys with negligible magneto-crystalline anisotropy. The main driving force for alignment is the magnetic shape anisotropy. Current understanding of the phenomenon is not adequate to quantify the effect of particle size, aspect ratio, temperature and the magnetic field on particle alignment. We demonstrate a Monte Carlo approach coupled with size scaling to show the conditions under which alignment is possible.

Authors:

Radhakrishnan, Balasubramaniam ^[1]; Nicholson, Don M ^[1]; Eisenbach, Markus ^[1]; Ludtka, Gerard Michael ^[1]; Rios, Orlando ^[1]; Parish, Chad M ^[1]

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

Publication Date:: Thu Jul 09 00:00:00 EDT 2015

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

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1207049

Alternate Identifier(s):: OSTI ID: 1247838

Grant/Contract Number:: AC05-00OR22725; De-AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Magnetism and Magnetic Materials

Additional Journal Information:: Journal Volume: 394; Journal ID: ISSN 0304-8853

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE

Citation Formats


                    Radhakrishnan, Balasubramaniam, Nicholson, Don M, Eisenbach, Markus, Ludtka, Gerard Michael, Rios, Orlando, and Parish, Chad M. Alignment of Iron Nanoparticles in a Magnetic Field Due to Shape Anisotropy.  United States: N. p., 2015. 
Web.  doi:10.1016/j.jmmm.2015.07.007.

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                    Radhakrishnan, Balasubramaniam, Nicholson, Don M, Eisenbach, Markus, Ludtka, Gerard Michael, Rios, Orlando, & Parish, Chad M. Alignment of Iron Nanoparticles in a Magnetic Field Due to Shape Anisotropy.  United States.  https://doi.org/10.1016/j.jmmm.2015.07.007

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                    Radhakrishnan, Balasubramaniam, Nicholson, Don M, Eisenbach, Markus, Ludtka, Gerard Michael, Rios, Orlando, and Parish, Chad M. Thu .  
"Alignment of Iron Nanoparticles in a Magnetic Field Due to Shape Anisotropy".  United States.  https://doi.org/10.1016/j.jmmm.2015.07.007.  https://www.osti.gov/servlets/purl/1207049.

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@article{osti_1207049,

  title        = {Alignment of Iron Nanoparticles in a Magnetic Field Due to Shape Anisotropy},

  author       = {Radhakrishnan, Balasubramaniam and Nicholson, Don M and Eisenbach, Markus and Ludtka, Gerard Michael and Rios, Orlando and Parish, Chad M},

  abstractNote = {During high magnetic field processing there is evidence for alignment of non-spherical metallic particles above the Curie temperature in alloys with negligible magneto-crystalline anisotropy. The main driving force for alignment is the magnetic shape anisotropy. Current understanding of the phenomenon is not adequate to quantify the effect of particle size, aspect ratio, temperature and the magnetic field on particle alignment. We demonstrate a Monte Carlo approach coupled with size scaling to show the conditions under which alignment is possible.},

  doi          = {10.1016/j.jmmm.2015.07.007},

  journal      = {Journal of Magnetism and Magnetic Materials},

  number       = ,

  volume       = 394,

  place        = {United States},

  year         = {Thu Jul 09 00:00:00 EDT 2015},

  month        = {Thu Jul 09 00:00:00 EDT 2015}

}

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