Stephen Etzkorn

PREVIOUS INSTITUTION: BS, University of Dallas, Dallas, Texas; PhD, The Ohio State University
DATE JOINED GROUP: June 1997
AREAS OF STUDY: Organic based magnets, fractal magnetism
EMAIL: etzkorn@mps.ohio-state.edu

CURRENT RESEARCH
Current research involves the study of spin dependent transport in layered magnetic devices which incorporate organic layers.

Graduate work involved the study of the magnetic behavior in the quasi-one-dimensional organic-based magnet [MnTPP]⁺[TCNE]^-. This material was shown to have spin glass properties including a frequency dependent cusp in the ac susceptibility as well as long-time relaxation above the spin glass transition temperature. The magnetic behavior was modeled with a critical fractal cluster scaling approach. The results suggest that the spin clusters formed in this system are fractal in nature, with the fractals largely concentrated along a single chain of the material.

PUBLICATIONS

• S.J. Etzkorn, Wendy Hibbs, Joel S. Miller, and A.J. Epstein, Physical Review Letters 89, 207201 (2002).
• S.J. Etzkorn, Wendy Hibbs, Joel S. Miller, and A.J. Epstein, Polyhedron, in press (2003).

PRESENTATIONS

• S.J. Etzkorn, Wendy Hibbs, Joel S. Miller, and A.J. Epstein, Magnetic Reversal and Relaxation in a Quasi-1D Fractal Cluster Glass, APS March National Meeting (2003), Austin, TX USA.
• S.J. Etzkorn, Wendy Hibbs, Joel S. Miller, and A.J. Epstein, Viscous Glassy Behavior in a Quasi-1D Organic-based Magnet APS March National Meeting (2002), Indianapolis, IN USA.
• S.J. Etzkorn, Wendy Hibbs, Joel S. Miller, and A.J. Epstein, Viscous Behavior in an Organic-Based Quasi-1D Fractal Cluster Glass, VIIIth International Conference on Molecule-Based Magnets (2002), Valencia, Spain.
• S.J. Etzkorn, Wendy Hibbs, Joel S. Miller, and A.J. Epstein, Anomalous coercivity of a quasi-1D organic-based magnet, APS March National Meeting (2001), Seattle, WA USA.
• S.J. Etzkorn, Wendy Hibbs, Joel S. Miller, and A.J. Epstein, Anomalous Coercivity of [Mn^IIITPP]⁺ [TCNE]^- 2(1,3-C₆H₄C_l2), VIIth International Conference on Molecule-Based Magnets (2000), San Antonio, TX USA.
• D.A. Pejaković, S.J. Etzkorn, A.J. Epstein, J.L. Manson, and J.S. Miller, Study of Light-Induced Magnetization in Molecule-Based Magnets, APS March National Meeting (1999), Atlanta, GA USA.

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