High Magnetic Field X-ray Diffraction at the National High Magnetic Field Laboratory (NHMFL)

ORAL

Abstract

We develop a custom high magnetic field x-ray diffraction system for measurements in the 25 T Florida split coil magnet at the DC Field Facility of NHMFL, Tallahassee, FL, to probe spin-lattice coupling at extreme steady-state magnetic fields. This allows thermal cycling of materials with first order transitions and thermal relaxation of highly conductive or magnetocaloric materials. The system utilizes a Mo rotating anode X-ray source and PILATUS 300K-W X hybrid pixel array detector customized to tolerate the fringe fields of the split coil magnet. We plan to further modify the diffractometer with an elliptical mirror system which will enhance intensity and create a convergent x-ray beam configuration. We present a study of the magnetocaloric material, AlFe2B2, highlighting the evolution of the unit cell volume in field and a study of the magnetostrictive material, GdNi, highlighting the evolution of the crystal axes at high field.

*This research is supported by NSF-DMR grant MRI-1625780. NHMFL is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida. The Ames Laboratory is operated for the U. S. Department of Energy by Iowa State University of Science and Technology under contract No. DE-AC02-07CH11358.

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Presenters

  • Drew Rebar

    • National High Magnetic Field Laboratory

Authors

  • Drew Rebar

    • National High Magnetic Field Laboratory

  • Alexey E Kovalev

    • National High Magnetic Field Laboratory
    • University of Nebraska - Lincoln

  • Dallas Mann

    • Chemistry and Biochemistry, Florida State University

  • Michael Shatruk

    • Chemistry and Biochemistry, Florida State University

  • Yaroslav Mudryk

    • Ames Laboratory, Iowa State University
    • Materials sciences and engineering, Ames Laboratory, US DOE, Ames IA

  • Vitalij K Pecharsky

    • Ames Laboratory, Iowa State University
    • Ames Laboratory
    • Materials sciences and engineering, Ames Laboratory, US DOE, Ames IA
    • Dept. of Material Science and Engineering, Ames Laboratory, Iowa State University, Ames, IA 50011

  • Kaya Wei

    • National High Magnetic Field Laboratory
    • Florida State University
    • NHMFL

  • Julia H. Smith

    • National High Magnetic Field Laboratory

  • Alexey Suslov

    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory, Tallahassee, Florida 32310
    • National High Magnetic Field Lab

  • Theo Siegrist

    • National High Magnetic Field Laboratory
    • Florida State University