Spin–Lattice Coupling in [Ni(HF2)(pyrazine)2]SbF6 Involving the HF2– Superexchange Pathway
Kenneth R. O’NealB. S. HolinsworthZhiguo ChenPeter K. PetersonKimberly E. CarreiroChanghoon LeeJamie L. MansonMyung‐Hwan WhangboZhiqiang LiZhenxian LiuJ. L. Musfeldt
Abstract
Magnetoelastic coupling in the quantum magnet [Ni(HF2)(pyrazine)2]SbF6 has been investigated via vibrational spectroscopy using temperature, magnetic field, and pressure as tuning parameters. While pyrazine is known to be a malleable magnetic superexchange ligand, we find that HF2- is surprisingly sensitive to external stimuli and is actively involved in both the magnetic quantum phase transition and the series of pressure-induced structural distortions. The amplified spin-lattice interactions involving the bifluoride ligand can be understood in terms of the relative importance of the intra- and interplanar magnetic energy scales.
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