Spin–Lattice Coupling in [Ni(HF2)(pyrazine)2]SbF6 Involving the HF2– Superexchange Pathway

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• 作者：Kenneth R. O’Neal ; Brian S. Holinsworth ; Zhiguo Chen ; Peter K. Peterson ; Kimberly E. Carreiro ; Changhoon Lee ; Jamie L. Manson ; Myung-Hwan Whangbo ; Zhiqiang Li ; Zhenxian Liu ; Janice L. Musfeldt
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：December 5, 2016
• 年：2016
• 卷：55
• 期：23
• 页码：12172-12178
• 全文大小：446K
• ISSN：1520-510X

文摘

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.