Martin Plumer




Magnetic North

Magnetic North is an organization of magnetism researchers in Canada and their international collaborators. It is a forum for information exchange on individual and group research activities, providing a list of researchers with links to home pages and recent reprints and preprints.

Computational Science: Master's Degree Program

Computational science uses computers in analyzing, interpreting and solving complex scientific problems arising in natural sciences (chemistry, physics, earth sciences and mathematics) and engineering.

Research Group

Ahmad Almudallal. Research Assistant.
Jason Mercer. Research Assistant (part time).
Martin Leblanc. Ph.D. Physics.
Hennadii Yerzhakov. M.Sc. Physics.
Shane Holden. B.Sc. Honors Math/Physics.

Former Research Group Members

Tim Fal. Postdoctoral Fellow 2011-13.
Renan Villarreal. M.Sc. Physics 2012.
Vahid Hemmati. M.Sc. Computational Science 2011.
Matthew Seymour. M.Sc. Physics 2011.
Martin Leblanc. M.Sc. Physics 2010.
Ian Wilding. Summer student 2010.
Jason Mercer. Research Assoc. (part time) 2009-11.
Trinh Nguyen. Postdoctoral Fellow 2008-10.
Stephen Condran. M.Sc. Computational Science 2009.
Tagore Mariathas. M.Sc. Physics 2008.
Matthew Rogers. NSERC summer student 2008.
Eric Meloche. Postdoctoral Fellow 2006-7.

Collaborations

Kris Poduska. Memorial.
Guy Quirion. Memorial.
John Whitehead. Memorial.
Johannes van Ek. Western Digital Corporation.
Johan van Lierop. Manitoba.
Byron Southern. Manitoba.

Funding

- NSERC Discovery Grant
- CFI (Canada Foundation for Innovation) Leaders Oppurtunity Fund
- ACEnet (Atlantic Computational Excellence Network)
- Western Digital Corporation (Computer Hard Drives).

Research

Long: Magnetic Recording and Kagome.
  • Magnetic Recording, and Monte Carlo Simulations Fcc Kagome Lattice


    Short: Magnetic Recording and Kagome.

  • Magnetic Recording, and Monte Carlo Simulations Fcc Kagome Lattice


  • Magnetoelectric Antiferromagnets CuFeO2 and HoMnO3


  • Symposium Jacques Cartier Grenoble 2010



    The study of systems with competing interactions often reveals exotic magnetic states, phase transitions and phase diagrams. Strong antiferromagnetic exchange forces which cannot be fully satisfied due to geometrical constraints imposed by certain crystal symmetries (e.g., triangular) provide a rich variety of new phenomena realized in a number of large classes of real magnetic materials. Much weaker and long-ranged ferromagnetic dipole interactions can then be important in breaking otherwise degenerate states of such frustrated systems.
    Systems with strong ferromagnetic exchange interactions can also experience geometrical frustration in nanometer size thin films. The much weaker but more long-range dipole forces are strongly influenced by sample geometry and a large number of magnetic configurations can occur. Investigations by numerical techniques of such systems provides a challenge due to the long-range nature of dipole forces as well as the large number of nearly degenerates states which are possible.
    Micromagnetics is a particular formalism (the Landau-Lifshitz-Gilbert equations) developed to study static and dynamical behavior of thin ferromagnetic films and has not been widely applied to other systems. For systems which exhibit phase transitions, much understanding is available through analytic techniques provided by development and analysis of an appropriate Landau free energy. Critical phenomena associated with these transitions can often be investigated using simple numerical Monte Carlo techniques.


    Martin Plumer
    Department of Physics and Physical Oceanography
    Memorial University of Newfoundland
    St. John's, NL
    A1B 3X7
    Canada
    Office: C3025
    Phone: (709) 864-2679
    Fax: (709) 864-8739
    email: plumer@mun.ca



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