We report electrical current switching of noncollinear antiferromagnetic (AFM) Mn 3 GaN/Pt bilayers at room temperature. The Hall resistance of these bilayers can be manipulated by applying a pulse current of 1.5 × 10 6 A/cm 2 , whereas no significant change is observed up to ∼ 10 8 A/cm 2 in Mn 3 GaN single films, indicating that the Pt layer plays an important role. In comparison with ferrimagnetic Mn 3 GaN/Pt bilayers, a lower electrical current switching of noncollinear AFM Mn 3 GaN is demonstrated, with a critical current density two orders of magnitude smaller. Our results highlight that a combination of a noncollinear AFM antiperovskite nitride and a spin-torque technique is a good platform of AFM spintronics.Antiferromagnets (AFMs) are promising materials for spintronics application owing to a number of properties, such as the absence of stray magnetic fields, terahertz spin dynamics, and stability against external perturbations, and, in this context, electrical manipulation of the Néel vector is an important emerging technique. [1][2][3][4] Recent experiments have demonstrated electrical current switching of the AFM Néel vector by Néel spinorbit torque (SOT) in CuMnAs 5,6 and Mn 2 As, 7,8 and by spin torque in NiO/Pt bilayers 9,10 and Pt/NiO/Pt trilayers. 11 These experiments show that the AFM Néel vector can be manipulated by electrical current densities of the order of 10 7 -10 8 A/cm 2 , which are similar to the current densities required with SOT in typical ferromagnet (FM)/heavy metal (HM) bilayers. On the other hand, according to an early study of AFM spintronics, 12 a current density two orders of magnitude smaller may theoretically be capable of manipulating the AFM Néel vector. Indeed, current-induced switching of exchange bias at such lower current densities has been realized in AFM/FM bilayers. [13][14][15] These results suggest the possibility of switching of the AFM Néel vector using lower electrical currents.Recently, noncollinear AFMs become one of the most fascinating classes among AFMs, because they exhibit a large magneto-transport and a novel spin transport phenomena. [16][17][18][19] However, the spin-torque switching of the AFM Néel vector is demonstrated in only collinear AFM, while the theoretical study shows that the domain of noncollinear AFM can be manipulated by spin current with realistic current density of ∼ 10 7 A/cm 2 . 20 Thus, noncollinear AFMs call for the spin current injection thorough spin-Hall effect. The antiperovskite manganese nitrides Mn 3 GaN (MGN) is a good platform to investigate the electrical current manipulation of noncollinear AFMs, as well as for comparisons of the critical current density between FM and AFM materials, because MGN is a noncollinear AFM while a perpendicularly magnetized ferrimagnet can be obtained by applying tetragonal distortion. [21][22][23] Both the Néel and Curie temperatures are reported to be above 380 K 24 and 660-740 K, 21,22 a) Electronic mail: t.hajiri@nagoya-u.jp respectively, which are relatively high for this class of materi...

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Sesame (Sesamum indicum) seedlings were cultured under regimes of differing air temperature and photoperiod in a plant factory under artificial light to evaluate these factors for inducing leaf browning. In experiment 1, plants were cultured under continuous lighting either at a constant air temperature