title: Magnetoelastic coupling through the antiferromagnet-to-ferromagnet transition of quasi-two-dimensional [Cu(HF2)(pyz)2]BF4 using infrared spectroscopy.
abstract: We investigated magnetoelastic coupling through the field-driven transition to the fully polarized magnetic state in quasi-two-dimensional [Cu(HF2)(pyz)2]BF4 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.
authors.affiliation: Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Musfeldt
authors.forename: L I
authors.initials: LI
authors.lastname: Vergara
authors.forename: T V
authors.initials: TV
authors.lastname: Brinzari
authors.forename: C
authors.initials: C
authors.lastname: Lee
authors.forename: L C
authors.initials: LC
authors.lastname: Tung
authors.forename: J
authors.initials: J
authors.lastname: Kang
authors.forename: Y J
authors.initials: YJ
authors.lastname: Wang
authors.forename: J A
authors.initials: JA
authors.lastname: Schlueter
authors.forename: J L
authors.initials: JL
authors.lastname: Manson
authors.forename: M-H
authors.initials: MH
authors.lastname: Whangbo