Spin-lattice interactions as revealed by the pressure-temperature phase diagram of Co[N(CN)2]2

ORAL

Abstract

We combined diamond anvil cell techniques, synchrotron-based infrared and Raman spectroscopies, and complementary lattice dynamics calculations to investigate spin-lattice coupling and the magnetic crossover mechanism in the molecule-based quantum magnet Co[N(CN)2]2. These findings along with prior magnetic properties work were brought together to create a pressure-temperature phase diagram in which the second-order structural boundaries converge on key areas of activity involving the spin state, exposing how the pressure-induced local lattice distortions trigger the ferromagnetic to antiferromagnetic crossover transition. Similar triggering events may take place in other materials.

*We thank the NSF and PRF for support of this work.

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Authors

  • Janice Musfeldt

    • Univ of Tennessee, Knoxville

  • T. V. Brinzari

    • University of Tennessee

  • K. R. O'Neal

    • University of Tennessee
    • University of Tennessee, Knoxville, USA

  • P. Chen

    • University of Tennessee

  • J. A. Schleuter

    • Argonne National Laboratory

  • J. L. Manson

    • Eastern Washington University
    • Dept. of Chem. and Biochem., Eastern Washington Univ.

  • A. P. Litvinchuk

    • University of Houston

  • Z. Liu

    • Carnegie Institute