We measure the diamagnetic deflection of anthracene and adamantane in a long-baseline matter-wave interferometer. From the nanometer-level deflection we extract the magnetic susceptibilities of the molecules which we compare with calculations and previous results. Adamantane yields an isotropic average mass susceptibility of −8.0 ± 1.1 m3 kg−1, consistent with expectations, while anthracene yields a higher-than-anticipated value of −13.6 ± 1.3 m3 kg−1. We attribute the high anthracene value to the planar aromatic molecule's magnetic anisotropy and partial alignment in the molecular beam, and estimate the magnitude of the effect on the observed deflection.
- Y.Y. Fein, A. Shayeghi, F. Kiałka, P. Geyer, S. Gerlich, and M. Arndt,
Quantum-assisted diamagnetic deflection of molecules,
Phys. Chem. Chem. Phys. 10.1039/d0cp02211j (2020). - Website of the Arndt Group
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