The crystallographic and magnetic properties are presented for van der Waals antiferromagnetic FePS_3. High-quality single crystals of millimeter size have been successfully synthesized through the chemical vapor tran...The crystallographic and magnetic properties are presented for van der Waals antiferromagnetic FePS_3. High-quality single crystals of millimeter size have been successfully synthesized through the chemical vapor transport method. The layered structure and cleavability of the compound are apparent, which are beneficial for a potential exploration of the interesting low dimensional magnetism, as well as for incorporation of FePS_3 into van der Waals heterostructures. For the sake of completeness, we have measured both direct current(dc) and alternating current(ac) magnetic susceptibility.The paramagnetic to antiferromagnetic transition occurs at approximately T_N 115 K. The effective moment is larger than the spin-only effective moment, suggesting that an orbital contribution to the total angular momentum of the Fe^(2+) could be present. The ac susceptibility is independent of frequency, which means that the spin freezing effect is excluded.Strong anisotropy of out-of-plane and in-plane susceptibility has been shown, demonstrating the Ising-type magnetic order in FePS_3 system.展开更多
A new intercalation compound,Fe_(0.85)PS_(3)(4,4-bipyH)_(0.30)(4,4-bipy=4,4-bipyridine),is obtained by the intercalation of 4,4-bipyridine-2HCl with lamellar FePS_(3),which is characterized by elemental analysis,powde...A new intercalation compound,Fe_(0.85)PS_(3)(4,4-bipyH)_(0.30)(4,4-bipy=4,4-bipyridine),is obtained by the intercalation of 4,4-bipyridine-2HCl with lamellar FePS_(3),which is characterized by elemental analysis,powder X-ray diffraction,infrared spectroscopy.By comparison with the pure FePS_(3),the lattice spacing of Fe0.85PS_(3)(4,4-bipyH)0.30 is expanded by~5.7,indicating that the ring plane of the vip is perpendicular to the layer of the host.The magnetic property of Fe0.85PS_(3)(4,4-bipyH)0.30 is studied with SQUID.It exhibits an antiferromagnetic phase transition with TN of about 70 K.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11404169,51602159,and 11704196)the Scientific Research Foundation of Nanjing University of Posts&Telecommunications,China(Grant Nos.NY217043 and NY218021)the Postgraduate Research&Practice Innovation Program of Jiangsu Province,China(Grant Nos.KYCX17 0754 and SJCX18 0287)
文摘The crystallographic and magnetic properties are presented for van der Waals antiferromagnetic FePS_3. High-quality single crystals of millimeter size have been successfully synthesized through the chemical vapor transport method. The layered structure and cleavability of the compound are apparent, which are beneficial for a potential exploration of the interesting low dimensional magnetism, as well as for incorporation of FePS_3 into van der Waals heterostructures. For the sake of completeness, we have measured both direct current(dc) and alternating current(ac) magnetic susceptibility.The paramagnetic to antiferromagnetic transition occurs at approximately T_N 115 K. The effective moment is larger than the spin-only effective moment, suggesting that an orbital contribution to the total angular momentum of the Fe^(2+) could be present. The ac susceptibility is independent of frequency, which means that the spin freezing effect is excluded.Strong anisotropy of out-of-plane and in-plane susceptibility has been shown, demonstrating the Ising-type magnetic order in FePS_3 system.
基金the National Natural Science Foundation of China for financial support.
文摘A new intercalation compound,Fe_(0.85)PS_(3)(4,4-bipyH)_(0.30)(4,4-bipy=4,4-bipyridine),is obtained by the intercalation of 4,4-bipyridine-2HCl with lamellar FePS_(3),which is characterized by elemental analysis,powder X-ray diffraction,infrared spectroscopy.By comparison with the pure FePS_(3),the lattice spacing of Fe0.85PS_(3)(4,4-bipyH)0.30 is expanded by~5.7,indicating that the ring plane of the vip is perpendicular to the layer of the host.The magnetic property of Fe0.85PS_(3)(4,4-bipyH)0.30 is studied with SQUID.It exhibits an antiferromagnetic phase transition with TN of about 70 K.
