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 MnN6 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.
Original Publication Title
Physical Review Letters
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Brinzari, T V.; Chen, P; Sun, Q C.; Liu, J; Tung, L C.; Wang, Y; Schlueter, J A.; Singleton, J; Manson, Jamie L.; Whangbo, M H.; Litvinchuk, A P.; and Musfeldt, J L., "Quantum Critical Transition Amplifies Magnetoelastic Coupling In Mn[N(Cn)(2)](2)" (2013). Chemistry and Biochemistry Faculty Publications. Paper 10.