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  • Magnetoelastic coupling through the antiferromagnet-to-ferromagnet transition of quasi-two-dimensional [Cu(HF2)(pyz)2]BF4 using infrared spectroscopy
    Musfeldt, J L; Vergara, L I; Brinzari, T V; Lee, C; Tung, L C; Kang, J; Wang, Y J; Schlueter, J A; Manson, J L; Whangbo, M-H

    Physical review letters, 10/2009, Letnik: 103, Številka: 15
    Journal Article

    We investigated magnetoelastic coupling through the field-driven transition to the fully polarized magnetic state in quasi-two-dimensional Cu(HF2)(pyz)2BF4 by magnetoinfrared spectroscopy. This transition modifies out-of-plane ring distortion and bending vibrational modes of the pyrazine ligand. The extent of these distortions increases with the field, systematically tracking the low-temperature magnetization. These distortions weaken the antiferromagnetic spin exchange, a finding that provides important insight into magnetic transitions in other copper halides.

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