Magnetoelastic coupling through the antiferromagnet-to-ferromagnet transition of quasi-two-dimensional [Cu(HF2)(pyz)2]BF4 using infrared spectroscopy.
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.
Musfeldt
J L
JL
Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA.
Vergara
L I
LI
Brinzari
T V
TV
Lee
C
C
Tung
L C
LC
Kang
J
J
Wang
Y J
YJ
Schlueter
J A
JA
Manson
J L
JL
Whangbo
M-H
MH