Jiajun Mo

Elementary magnons and interacting multi-magnon quasiparticles in the effective spin-$\frac{1}{2}$ kagome-staircase magnet Co$_{3}$V$_{2}$O$_{8}$

Yuan Xiao, Jiajun Mo, Zhenmeng Jiang, Haoyang Leng et autres

The excitation spectrum of an anisotropic magnet provides a direct link between its microscopic Hamiltonian and interaction-driven quasiparticles. Here we use high-resolution time-domain terahertz spectroscopy to map the magnetic excitations of the three-dimensional kagome-staircase compound Co$_{3}$V$_{2}$O$_{8}$ as functions of temperature and magnetic …

Emergent Vortex Ordering in a Multiflavor Pyrochlore-Lattice Compound GeCo$_2$O$_4$

Jiajun Mo, Otkur Omar, Shuangkui Guang, Kazuki Iida et autres

Entangled spin and orbital degrees of freedom provide a multiflavor route to novel magnetic states inaccessible in conventional spin systems. Here, we report the experimental identification of an emergent vortex lattice in the multiflavor pyrochlore-lattice compound GeCo$_2$O$_4$. By combining comprehensive neutron scattering …

Emergent Vortex Ordering in a Multiflavor Pyrochlore-Lattice Compound GeCo$_2$O$_4$

Jiajun Mo, Otkur Omar, Shuangkui Guang, Kazuki Iida et autres

Entangled spin and orbital degrees of freedom provide a multiflavor route to novel magnetic states inaccessible in conventional spin systems. Here, we report the experimental identification of an emergent vortex lattice in the multiflavor pyrochlore-lattice compound GeCo$_2$O$_4$. By combining comprehensive neutron scattering …

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Synthesizing Multisubstituted Cyclohexanes via Palladium‐Catalyzed [4+2] Cycloaddition

Jiajun Mo, Xuyang Li, Jie Peng, Yungui Peng et autres

Cyclohexanes bearing three contiguous stereocenters, two of which are all‐carbon quaternary centrers, are synthesized via palladium‐catalyzed [4+2] cycloaddition between methylene‐δ‐valerolactones and electron‐deficient trisubstituted olefins. The reaction proceeds under mild conditions and exhibits broad substrate scope. Preliminary studies using chiral ligands afforded the …

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Skyrmion and Meron Crystals in Intermetallic Gd$_3$Ru$_4$Al$_{12}$: Microscopic Model Insights into Chiral Phases

Jiajun Mo, Leandro M. Chinellato, Fletcher Williams, Akiko Kikkawa et autres

Topological spin textures in frustrated intermetallics hold great promise for spintronics applications. However, understanding their origin and properties remains a significant challenge due to competing and often long-range interactions mediated by conduction electrons. Here, by combining neutron scattering experiments with theoretical modeling …

Skyrmion and Meron Crystals in Intermetallic Gd$_3$Ru$_4$Al$_{12}$: Microscopic Model Insights into Chiral Phases

Jiajun Mo, Leandro M. Chinellato, Fletcher Williams, Akiko Kikkawa et autres

Topological spin textures in frustrated intermetallics hold great promise for spintronics applications. However, understanding their origin and properties remains a significant challenge due to competing and often long-range interactions mediated by conduction electrons. Here, by combining neutron scattering experiments with theoretical modeling …

The Role of B-Site Distribution in Ca2FeReO6

Guoqing Liu, Jiajun Mo, Zeyi Lu, Qinghang Zhang et autres

This study systematically investigates the spin glass behavior of the double perovskite Ca 2 FeReO 6 . Building on previous research, we developed a formula to quantify the distribution of ions at the B-site, incorporating next-nearest-neighbor interactions. Using molecular field theory and …

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Study of the Structure, Multiferroic, and Magnetic Order of Er0.9La0.1Cr0.8Fe0.2O3

Kaiyang Gao, Hengjian Hou, Jiyu Shen, Zeyi Lu et autres

Herein, the multiferroic perovskite Er0.9La0.1Cr0.8Fe0.2O3 was synthesized using the sol–gel method, and its structure and multiferroic properties were investigated. The magnetic order of Er0.9La0.1Cr0.8Fe0.2O3 was analyzed through magnetic entropy change curves. Furthermore, a four‐sublattice molecular field model was constructed to study the …

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Unveiling the Impact of B-site Distribution on the Frustration Effect in Double Perovskite Ca2FeReO6 Using Monte Carlo Simulation and Molecular Field Theory

Guoqing Liu, Jiajun Mo, Zeyi Lu, Qinghang Zhang et autres

This work systematically investigates the spin glass behavior of the double perovskite Ca2FeReO6. Building on previous studies, we have developed a formula to quantify the ions distribution at B-site, incorporating the next-nearest neighbor interactions. Employing molecular field theory and Monte Carlo simulations, …

Study of the magnetism of C-doped MgO based on first-principles calculations and the Ising model

Rui-Da Chen, Jiajun Mo, Fei Mao

is introduced by each C impurity. The polarization energy and formation energy of C-doped MgO are calculated, and the magnetization energy of C-doped MgO is also calculated which is used to obtain the exchange constant between C impurities. By means of the …

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Research on Construction of Cybersecurity Crisis Management System and Decision-making Ability in Universities

Jiajun Mo, Xiangran Cheng, Xiangcheng Li

Universities are an important organization to cultivate talents as well as scientific research for the country, and the continuous occurrence of cybersecurity incidents around the world have posed a great threat to them, and laying a firm foundation for cybersecurity management has …

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Unraveling the Nature of Thermally Induced Spin Reorientation in NdFe1–xCrxO3 (x = 0.1 and 0.9)

Jiyu Shen, Jiajun Mo, Zeyi Lu, Zhongjin Wu et autres

Understanding spin control mechanisms is crucial in condensed matter physics and serves as a theoretical foundation for designing spintronic devices. In this paper, we propose that the primary magnetic mechanism in NdFe 1– x Cr x O 3 is driven by temperature-sensitive …

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