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Published on: June 7, 2018
Quantum critical transition amplifies magnetoelastic coupling in Mn[N(CN)2]2
T V Brinzari1, P Chen1, Q-C Sun1
1Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA.
Abstract:
We report the discovery of a magnetic quantum critical transition in Mn[N(CN)(2)](2) that drives the system from a canted antiferromagnetic state to the fully polarized state with amplified magnetoelastic coupling as an intrinsic part of the process. The local lattice distortions, revealed through systematic phonon frequency shifts, suggest a combined MnN(6) octahedra distortion+counterrotation mechanism that reduces antiferromagnetic interactions and acts to accommodate the field-induced state. These findings deepen our understanding of magnetoelastic coupling near a magnetic quantum critical point and away from the static limit.
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