Pressure-Induced Enhancement of the Magnetic Anisotropy in Mn(N(CN))
arXiv:1412.2318 · doi:10.1103/PhysRevB.91.014439
Abstract
Using dc and ac magnetometry, the pressure dependence of the magnetization of the three-dimensional antiferromagnetic coordination polymer Mn(N(CN)) was studied up to 12 kbar and down to 8K. The magnetic transition temperature, , increases dramatically with applied pressure , where a change from K to ~kbar K was observed. In addition, a marked difference in the magnetic behavior is observed above and below 7.1 kbar. Specifically, for kbar, the differences between the field-cooled and zero-field-cooled (fc-zfc) magnetizations, the coercive field, and the remanent magnetization decrease with increasing pressure. However, for kbar, the behavior is inverted. Additionally, for kbar, minor hysteresis loops are observed. All of these effects are evidence of the increase of the superexchange interaction and the appearance of an enhanced exchange anisotropy with applied pressure.
9 pages, 7 figures, with 7 additional figures as Supplemental Material