We report a weak anisotropic ferromagnetic behavior in a purely organic molecule at room temperature, a property rarely reported in organic nanomaterials. The reported 1,2-bis­(tritylthio)­ethane, forming plate- and organic-flower-like morphologies at the nanolevel, is the first organic crystal with an inherent magnetic property at 300 and 2 K. However, at low temperatures, the magnetization value [M max(T) ∼ 116 emu/mol at 2 K] increases drastically at 3 orders higher compared to 300 K. Interestingly, the system exhibits strong anisotropy with an anisotropic constant, K 1 ∼ 3.25 × 103 erg/cc, and anisotropy field, H K ∼ 3.25 kOe. Below 10 K, this system displays unusual temperature dependence of the coercive field [H C(T)] and remanence magnetization [M R(T)] with a hysteresis-peak anomaly (T* ∼ 10–15 K) due to the enhanced spin–orbit coupling. The maximum H C and M R at T* were H C = 220 Oe and M R ∼ 12 emu/mol, respectively. Beyond T*, H C(T) and M R(T) drop continuously and become negligible as the measurement temperature approaches 300 K. Our results demonstrate that the triphenyl molecules can be further exploited for the design and synthesis of organic magnets for possible applications in spintronics and memory storage devices.

We study numerically the fractional Shapiro step response in low-frequency driven Josephson junctions which have a nonsinusoidal current-phase relation. We perform this study within the resistively shunted Josephson junction model. We demonstrate that fractional steps, as a fingerprint of a skewed current phase relation, will manifest themselves only for higher values of the reduced frequency. We compare the theoretical observations with experimental measurements in an anisotropic Josephson junction array containing over 500 superconductornormal-superconductor junctions having a skewed current phase relation. We demonstrate that changing the critical current by applying a magnetic field is a robust method to modify the reduced frequency over a broad range of values. The presence of fractional Shapiro steps at high values of the reduced frequency directly confirm the theoretical results.