Fig. 2: EFM-EPR spectra.
From: Electric control of magnetic exchange in a molecular spin triangle
EPR spectra (top panels) and corresponding EFM-EPR spectra (bottom panels) acquired on a single crystal of Cu3 at 30 K in different experimental configurations (a schematic representation of the crystal in the sample holder for EFM-EPR viewed from the top and orientation of A’/B triangles are reported at the bottom of the figure. For the conventional EPR spectra the Em is not present, and replaced by Bm || B0): (a) The a crystallographic axis, B0, and Em all are oriented toward the same direction (φM = 0°, φE = 0°); (b) The a axis is parallel to B0 and antiparallel to Em (φM = 0°, φE = 180°); (c) A –150° rotation of the crystal about the c axis and B0 parallel to –Em (φM = 150°, φE = –30°); (d) The c axis, B0, and Em all are oriented toward the same direction. The EFM-EPR spectra intensities are rescaled by the number of acquisitions n (n = 15, 16, 59, and 8, respectively), necessary to achieve a reasonable signal-to-noise ratio. Gray dash lines indicate the EPR resonance field. In the top panels, red lines represent the simulations with the SH model given in Eq. (1) with parameters reported in Table 1. In the bottom panels, red lines represent the simulations performed using the SH model from Eq. (1) with the δg and δJ from ab initio and DFT calculations (see Table 2). Source data are provided with this paper.
